FNUS55 KRIW 211001 FWFRIW Fire Weather Planning Forecast for Western and Central Wyoming National Weather Service Riverton WY 401 AM MDT Sun Jun 21 2026 .DISCUSSION... ...Yellowstone NP and Teton dispatch areas (includes fire weather zones 140...414...415...and 416)... The first day of summer will have a mix of clouds and sunshine. A few locations may see a shower or thunderstorms, mainly in Zones 140 and 415, but the chance is less than 20 percent. Relative humidity will remain above critical levels. Wind should remain light to moderate except in and around a any shower or thunderstorm. Mixing and smoke dispersal will be generally good to very good in the afternoon. ...Cody dispatch area (includes fire weather zones 275...276... 282...283...285...286...287...288...and 289)... A weak weather system will move through the area today and bring scattered showers and thunderstorms, most numerous in the afternoon and in the northern zones, Showers and storms should not be as strong as yesterday. Relative humidity will remain above critical levels. Wind should remain light to moderate except in and around any shower or thunderstorm. Mixing and smoke dispersal will be generally good to very good in the afternoon. ...Casper dispatch area (includes fire weather zones 277...278... 279...280...281...285...289...and 300)... A weak weather system will bring scattered showers and thunderstorms to Zones 281, 280 and 300, most numerous in the afternoon and evening. Elsewhere, a stray shower or thunderstorm can't be ruled out but the chance is less than 15 percent. Relative humidity will fall in the teens across southern Wyoming. However, wind should remain light to moderate except in and around any shower or thunderstorm. Mixing and smoke dispersal will be generally good to excellent in the afternoon. ...Thunderstorms imply strong gusty and erratic winds... WYZ280-221215- Natrona County/Casper BLM- Including the cities of Casper and Midwest 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Chance of showers and slight chance of thunderstorms in the morning. Showers likely and chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Chance of thunder...40 percent. Max temperature.....71-76. 24 hr trend......11 degrees cooler. Min humidity........37-43 percent. 24 hr trend......10 percent wetter. 20-foot winds.......Northwest winds around 10 mph until 1500, then north. Gusts up to 25 mph. Ridge top winds.....Northwest around 15 mph. Chc of wetting rain.Less than 5 percent. Transport winds.....Northwest around 15 mph. Mixing Height.......1600-3600 ft agl until 1200, then 5000-6400 ft agl. Smoke dispersal.....Fair to good. .TONIGHT... Sky/weather.........Partly cloudy. Slight chance of thunderstorms in the evening. Slight chance of showers in the evening. Slight chance of showers early in the morning. Chance of precipitation 20 percent. Chance of thunder...10 percent. Min temperature.....45-50. 24 hr trend......2 degrees cooler. Max humidity........79-85 percent. 24 hr trend......7 percent wetter. Humidity recovery...Excellent. 20-foot winds.......Northeast winds around 10 mph until 2400, then downslope/downvalley 4-7 mph. Gusts up to 25 mph. Ridge top winds.....East 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northeast around 15 mph until 2400, then southeast. Mixing Height.......2200-4200 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Poor. .MONDAY... Sky/weather.........Partly cloudy. Slight chance of showers and thunderstorms in the afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....78-83. 24 hr trend......7 degrees warmer. Min humidity........25-31 percent. 24 hr trend......15 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then northwest 10 to 15 mph with gusts to around 30 mph. Ridge top winds.....South around 10 mph until 1200, then northwest around 20 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph until 1200, then west around 20 mph. Mixing Height.......2200-4200 ft agl until 1200, then 7600-9600 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good to excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Partly cloudy. Slight chance of showers and thunderstorms in the evening. Lows in the upper 40s. Northeast winds around 15 mph. .TUESDAY...Mostly clear. Lows in the upper 40s. Highs in the upper 70s. Northeast winds around 10 mph. .WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 47 to 52. Highs 79 to 84. East winds around 10 mph. .FRIDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the lower 90s. .SATURDAY...Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. $$ WYZ283-221215- Upper Wind River Basin/Wind River Basin- Including the cities of Crowheart, Lander, Riverton, and Shoshoni 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of showers in the morning. Slight chance of thunderstorms through the day. Chance of showers in the afternoon. Chance of precipitation 50 percent. Chance of thunder...20 percent. Max temperature.....72-77. 24 hr trend......7 degrees cooler. Min humidity........31-37 percent. 24 hr trend......3 percent wetter. 20-foot winds.......North winds around 10 mph. Gusts up to 20 mph. Ridge top winds.....North 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest 10 to 15 mph. Mixing Height.......2200-4200 ft agl until 1200, then 5800-7600 ft agl. Smoke dispersal.....Fair to good. .TONIGHT... Sky/weather.........Mostly clear. Slight chance of showers and thunderstorms in the evening. Chance of precipitation 20 percent. Chance of thunder...10 percent. Min temperature.....45-50. 24 hr trend......1 degree cooler. Max humidity........66-72 percent. 24 hr trend......1 percent wetter. Humidity recovery...Good. 20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then east around 10 mph until 0300, then downslope/downvalley 4-7 mph. Gusts up to 25 mph. Ridge top winds.....East around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....East around 15 mph. Mixing Height.......2600-4600 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Poor. .MONDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....77-82. 24 hr trend......6 degrees warmer. Min humidity........20-26 percent. 24 hr trend......12 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then northwest 10 to 15 mph with gusts to around 30 mph. Ridge top winds.....West 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph until 1200, then around 20 mph. Mixing Height.......2400-4400 ft agl until 1200, then 9000-11000 ft agl. Smoke dispersal.....Poor to fair until 1200, then excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Clear. Lows in the upper 40s. Northeast winds around 10 mph. .TUESDAY...Mostly clear. Lows in the upper 40s. Highs in the upper 70s. Northeast winds around 10 mph. .WEDNESDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows around 50. Highs in the lower 80s. Northeast winds around 10 mph. .THURSDAY...Mostly clear. Lows in the lower 50s. Highs in the mid 80s. Northwest winds around 10 mph. .FRIDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the upper 80s. .SATURDAY...Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. $$ WYZ285-221215- South Bighorn Mountains- 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Mostly cloudy then becoming partly cloudy. Slight chance of thunderstorms in the morning. Chance of showers through the day. Chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Chance of thunder...30 percent. Max temperature.....65-70. 24 hr trend......9 degrees cooler. Min humidity........43-49 percent. 24 hr trend......12 percent wetter. 20-foot winds.......Northwest winds 10 to 15 mph with gusts to around 25 mph. Ridge top winds.....Northwest 15 to 20 mph. Chc of wetting rain.Less than 5 percent. Transport winds.....Northwest 15 to 20 mph. Mixing Height.......1200-3200 ft agl until 1200, then 4200-6200 ft agl. Smoke dispersal.....Fair to good. .TONIGHT... Sky/weather.........Partly cloudy. Slight chance of thunderstorms until early morning. Slight chance of showers through the night. Chance of precipitation 20 percent. Chance of thunder...20 percent. Min temperature.....45-50. 24 hr trend......1 degree cooler. Max humidity........75-81 percent. 24 hr trend......1 percent drier. Humidity recovery...Excellent. 20-foot winds.......North winds around 10 mph until 2100, then southeast until 0300, then south. Gusts up to 20 mph. Ridge top winds.....Northeast around 15 mph until 2400, then south. Chc of wetting rain.Zero percent. Transport winds.....Northeast around 15 mph until 2400, then southeast. Mixing Height.......2000-4000 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Poor. .MONDAY... Sky/weather.........Mostly sunny. Slight chance of thunderstorms in the morning. Chance of showers through the day. Chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Chance of thunder...20 percent. Max temperature.....69-74. 24 hr trend......5 degrees warmer. Min humidity........32-38 percent. 24 hr trend......9 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then southwest 10 to 15 mph with gusts to around 30 mph until 1500, then northwest with gusts to around 30 mph. Ridge top winds.....Southwest around 15 mph until 1200, then northwest. Chc of wetting rain.Zero percent. Transport winds.....West 15 to 20 mph. Mixing Height.......2400-4400 ft agl until 1200, then 5800-7800 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .Forecast days 3 through 7...... .MONDAY NIGHT...Mostly clear. Slight chance of showers and thunderstorms in the evening. Lows in the mid 40s. North winds around 10 mph. .TUESDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the mid 40s. Highs in the upper 60s. East winds around 10 mph. .WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 48 to 53. Highs 71 to 76. West winds around 10 mph. .FRIDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the lower 80s. .SATURDAY...Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. $$ WYZ281-221215- Johnson County/Casper BLM- Including the cities of Buffalo and Kaycee 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Mostly cloudy then becoming partly cloudy. Slight chance of thunderstorms in the morning. Showers likely through the day. Chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Chance of thunder...40 percent. Max temperature.....68-73. 24 hr trend......11 degrees cooler. Min humidity........44-50 percent. 24 hr trend......21 percent wetter. 20-foot winds.......North winds 10 to 15 mph until 1200, then 15 to 20 mph. Gusts up to 35 mph. Ridge top winds.....North 15 to 20 mph. Chc of wetting rain.5 percent until 1200, then 15 percent. Transport winds.....North 15 to 20 mph. Mixing Height.......1400-3400 ft agl until 1200, then 4200-5600 ft agl. Smoke dispersal.....Fair to good. .TONIGHT... Sky/weather.........Partly cloudy. Slight chance of showers. Slight chance of thunderstorms through the night. Chance of showers early in the morning. Chance of precipitation 50 percent. Chance of thunder...20 percent. Min temperature.....47-52. 24 hr trend......2 degrees cooler. Max humidity........79-85 percent. 24 hr trend......2 percent wetter. Humidity recovery...Excellent. 20-foot winds.......Northeast winds around 10 mph and gusty until 2100, then downslope/downvalley 4-7 mph. Ridge top winds.....East around 10 mph until 2400, then south. Chc of wetting rain.Zero percent. Transport winds.....Northeast around 10 mph until 2400, then south. Mixing Height.......1400-3400 ft agl until 2400, then 400 ft agl. Smoke dispersal.....Poor. .MONDAY... Sky/weather.........Partly cloudy. Slight chance of thunderstorms in the morning. Chance of showers through the day. Chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Chance of thunder...40 percent. Max temperature.....70-75. 24 hr trend......3 degrees warmer. Min humidity........43-49 percent. 24 hr trend......1 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then southeast around 10 mph and gusty until 1200, then northeast with gusts to around 30 mph until 1500, then north with gusts to around 30 mph. Ridge top winds.....South around 10 mph until 1200, then north around 20 mph. Chc of wetting rain.Zero percent until 1200, then 10 percent. Transport winds.....South around 10 mph until 1200, then northwest around 20 mph. Mixing Height.......1800-3800 ft agl until 1200, then 4200-6200 ft agl. Smoke dispersal.....Poor to fair until 1200, then good. .Forecast days 3 through 7...... .MONDAY NIGHT...Partly cloudy. Chance of showers and slight chance of thunderstorms in the evening, then slight chance of showers after midnight. Lows in the upper 40s. North winds around 10 mph. .TUESDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the lower 70s. Winds generally less than 10 mph. .WEDNESDAY THROUGH THURSDAY...Partly cloudy with chance of showers and thunderstorms. Lows 49 to 54. Highs 76 to 81. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the lower 90s. .SATURDAY...Partly cloudy. Chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. $$ WYZ282-221215- South Bighorn Basin/Worland BLM- Including the cities of Ten Sleep, Thermopolis, and Worland 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of showers through the day. Slight chance of thunderstorms in the late morning and afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....69-74. 24 hr trend......6 degrees cooler. Min humidity........29-35 percent. 24 hr trend......5 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then northwest 10 to 15 mph. Gusts up to 25 mph. Ridge top winds.....Northwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 15 mph. Mixing Height.......2200-4200 ft agl until 1200, then 6200-8200 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .TONIGHT... Sky/weather.........Partly cloudy. Slight chance of showers and thunderstorms through the night. Chance of precipitation 20 percent. Chance of thunder...20 percent. Min temperature.....45-50. 24 hr trend......1 degree cooler. Max humidity........75-81 percent. 24 hr trend......8 percent drier. Humidity recovery...Excellent. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....Northeast around 10 mph until 2400, then south. Chc of wetting rain.Zero percent. Transport winds.....Northeast around 10 mph until 2400, then south. Mixing Height.......3200-5200 ft agl until 2400, then 400 ft agl. Smoke dispersal.....Poor. .MONDAY... Sky/weather.........Mostly sunny. Slight chance of thunderstorms late in the morning. Slight chance of showers in the late morning and afternoon. Slight chance of thunderstorms in the afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....72-77. 24 hr trend......2 degrees warmer. Min humidity........31-37 percent. 24 hr trend......2 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then northwest 10 to 15 mph with gusts to around 35 mph. Ridge top winds.....South around 10 mph until 1200, then northwest around 20 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph until 1200, then northwest around 20 mph. Mixing Height.......2000-4000 ft agl until 1200, then 5400-7400 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .Forecast days 3 through 7...... .MONDAY NIGHT...Mostly clear. Lows around 50. Northwest winds around 15 mph. .TUESDAY...Mostly clear. Lows in the lower 50s. Highs in the upper 70s. Winds generally less than 10 mph. .WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 52 to 57. Highs 81 to 86. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the upper 50s. Highs in the lower 90s. .SATURDAY...Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. $$ WYZ275-221215- North Bighorn Basin/Worland BLM- Including the cities of Greybull, Lovell, and Powell 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of showers through the day. Slight chance of thunderstorms in the late morning and afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....67-72. 24 hr trend......3 degrees cooler. Min humidity........31-37 percent. 24 hr trend......Unchanged. 20-foot winds.......Northwest winds 10 to 15 mph with gusts to around 25 mph. Ridge top winds.....Northwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest 15 to 20 mph. Mixing Height.......2400-4400 ft agl until 1200, then 6600-8600 ft agl. Smoke dispersal.....Fair to good until 1200, then very good. .TONIGHT... Sky/weather.........Partly cloudy. Slight chance of showers in the evening. Slight chance of thunderstorms through the night. Chance of showers after midnight. Chance of precipitation 50 percent. Chance of thunder...20 percent. Min temperature.....46-51. 24 hr trend......1 degree cooler. Max humidity........76-82 percent. 24 hr trend......4 percent drier. Humidity recovery...Excellent. 20-foot winds.......North winds around 10 mph and gusty until 2100, then downslope/downvalley 4-7 mph. Ridge top winds.....Northwest around 15 mph until 2400, then south. Chc of wetting rain.Zero percent. Transport winds.....North around 15 mph until 2400, then southeast. Mixing Height.......3200-5200 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .MONDAY... Sky/weather.........Partly cloudy then becoming mostly sunny. Chance of showers and slight chance of thunderstorms in the morning. Chance of thunderstorms and slight chance of showers in the afternoon. Chance of precipitation 50 percent. Chance of thunder...10 percent. Max temperature.....67-72. 24 hr trend......2 degrees cooler. Min humidity........42-48 percent. 24 hr trend......10 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then northwest 10 to 15 mph with gusts to around 40 mph until 1500, then north around 20 mph with gusts to around 40 mph. Ridge top winds.....Northwest around 10 mph until 1200, then around 20 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 10 mph until 1200, then around 20 mph. Mixing Height.......1600-3600 ft agl until 1200, then 4200-6200 ft agl. Smoke dispersal.....Poor to fair until 1200, then good. .Forecast days 3 through 7...... .MONDAY NIGHT...Mostly clear. Lows in the upper 40s. Northwest winds around 15 mph. .TUESDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows around 50. Highs in the mid 70s. North winds around 10 mph. .WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 52 to 57. Highs 80 to 85. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the upper 50s. Highs around 90. .SATURDAY...Partly cloudy. Slight chance of showers in the morning, then chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. $$ WYZ276-221215- Cody Foothills- Including the cities of Clark, Cody, and Meeteetse 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of showers early in the morning. Slight chance of showers and thunderstorms in the late morning and early afternoon, then chance of showers and thunderstorms late in the afternoon. Chance of precipitation 50 percent. Chance of thunder...30 percent. Max temperature.....68-73. 24 hr trend......3 degrees cooler. Min humidity........37-43 percent. 24 hr trend......5 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then north around 10 mph. Gusts up to 20 mph. Ridge top winds.....Northwest around 15 mph until 1200, then north. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 15 mph. Mixing Height.......2200-4200 ft agl until 1200, then 6200-8200 ft agl. Smoke dispersal.....Fair to good. .TONIGHT... Sky/weather.........Partly cloudy. Chance of showers in the evening. Slight chance of thunderstorms through the night. Slight chance of showers after midnight. Chance of precipitation 50 percent. Chance of thunder...20 percent. Min temperature.....47-52. 24 hr trend......2 degrees cooler. Max humidity........66-72 percent. 24 hr trend......8 percent drier. Humidity recovery...Good. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....North around 10 mph until 2400, then west. Chc of wetting rain.Zero percent. Transport winds.....North around 10 mph until 2400, then west. Mixing Height.......2400-4400 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Poor. .MONDAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Chance of showers and thunderstorms early in the afternoon. Slight chance of showers and thunderstorms early in the afternoon. Chance of precipitation 50 percent. Chance of thunder...30 percent. Max temperature.....68-73. 24 hr trend......2 degrees cooler. Min humidity........40-46 percent. 24 hr trend......10 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then north 10 to 15 mph with gusts to around 40 mph until 1500, then around 20 mph with gusts to around 40 mph. Ridge top winds.....North around 15 mph until 1200, then around 25 mph. Chc of wetting rain.Less than 5 percent. Transport winds.....Northwest around 15 mph until 1200, then around 25 mph. Mixing Height.......1600-3600 ft agl until 1200, then 3600-5600 ft agl. Smoke dispersal.....Fair to good. .Forecast days 3 through 7...... .MONDAY NIGHT...Partly cloudy. Slight chance of showers and thunderstorms in the evening. Lows in the upper 40s. Northwest winds around 10 mph. .TUESDAY...Mostly clear. Lows in the upper 40s. Highs in the lower 70s. North winds around 10 mph. .WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 51 to 56. Highs 75 to 80. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the mid 80s. .SATURDAY...Not as warm. Partly cloudy. Slight chance of showers in the morning, then chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. $$ WYZ287-221215- Owl Creek Mountains- 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of showers and thunderstorms in the morning, then chance of showers and thunderstorms in the afternoon. Chance of precipitation 50 percent. Chance of thunder...30 percent. Max temperature.....65-70. 24 hr trend......7 degrees cooler. Min humidity........38-44 percent. 24 hr trend......10 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then north around 10 mph until 1500, then upslope/upvalley 5-9 mph. Gusts up to 20 mph. Ridge top winds.....North 10 to 15 mph. Chc of wetting rain.Less than 5 percent. Transport winds.....Northwest 10 to 15 mph. Mixing Height.......2000-4000 ft agl until 1200, then 5000-6400 ft agl. Smoke dispersal.....Fair to good. .TONIGHT... Sky/weather.........Partly cloudy. Chance of showers and slight chance of thunderstorms in the evening. Chance of precipitation 40 percent. Chance of thunder...20 percent. Min temperature.....45-50. 24 hr trend......1 degree cooler. Max humidity........69-75 percent. 24 hr trend......4 percent drier. Humidity recovery...Good. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....Northeast around 10 mph until 2400, then south. Chc of wetting rain.Zero percent. Transport winds.....North around 10 mph until 2400, then south. Mixing Height.......1800-3800 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Poor. .MONDAY... Sky/weather.........Mostly sunny. Slight chance of showers and thunderstorms early in the afternoon. Slight chance of showers and thunderstorms late in the afternoon. Chance of precipitation 20 percent. Chance of thunder...20 percent. Max temperature.....69-74. 24 hr trend......4 degrees warmer. Min humidity........30-36 percent. 24 hr trend......6 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then south around 10 mph and gusty until 1200, then northwest with gusts to around 35 mph until 1500, then north around 20 mph with gusts to around 35 mph. Ridge top winds.....South around 10 mph until 1200, then north around 20 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph until 1200, then northwest around 20 mph. Mixing Height.......2200-4200 ft agl until 1200, then 5400-7400 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .Forecast days 3 through 7...... .MONDAY NIGHT...Clear. Lows in the upper 40s. North winds around 15 mph. .TUESDAY...Mostly clear. Lows in the upper 40s. Highs around 70. Northeast winds around 10 mph. .WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 50 to 55. Highs 73 to 78. West winds around 10 mph. .FRIDAY...Partly cloudy. Lows in the mid 50s. Highs in the lower 80s. .SATURDAY...Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. $$ WYZ286-221215- Absaroka Mountains/North Shoshone NF- Including the city of Pahaska 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of showers until late afternoon. Slight chance of thunderstorms in the late morning and early afternoon, then chance of showers and thunderstorms late in the afternoon. Chance of precipitation 50 percent. Chance of thunder...30 percent. Max temperature.....60-65. 24 hr trend......4 degrees cooler. Min humidity........43-49 percent. 24 hr trend......2 percent wetter. 20-foot winds.......Northwest winds around 10 mph with higher gusts. Ridge top winds.....Northwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 15 mph. Mixing Height.......2000-4000 ft agl until 1200, then 5600-7600 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .TONIGHT... Sky/weather.........Partly cloudy. Chance of showers in the evening. Slight chance of thunderstorms through the night. Slight chance of showers after midnight. Chance of precipitation 50 percent. Chance of thunder...20 percent. Min temperature.....42-47. 24 hr trend......1 degree cooler. Max humidity........69-75 percent. 24 hr trend......15 percent drier. Humidity recovery...Good. 20-foot winds.......West winds around 10 mph until 2100, then downslope/downvalley 4-7 mph. Gusts up to 20 mph. Ridge top winds.....West around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing Height.......2600-4600 ft agl until 2400, then 600 ft agl. Smoke dispersal.....Poor to fair until 2400, then poor. .MONDAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Slight chance of showers and thunderstorms in the morning. Chance of showers and thunderstorms in the afternoon. Chance of precipitation 50 percent. Chance of thunder...20 percent. Max temperature.....59-64. 24 hr trend......2 degrees warmer. Min humidity........48-54 percent. 24 hr trend......8 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west 10 to 15 mph. Gusts up to 30 mph. Ridge top winds.....West 15 to 20 mph. Chc of wetting rain.Zero percent until 1200, then 10 percent. Transport winds.....West around 15 mph until 1200, then around 25 mph. Mixing Height.......3000-5000 ft agl until 1200, then 6600-8600 ft agl. Smoke dispersal.....Good until 1200, then very good to excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Mostly clear. Chance of showers and slight chance of thunderstorms in the evening. Lows in the lower 40s. Winds generally less than 10 mph. .TUESDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the lower 40s. Highs in the mid 60s. Winds generally less than 10 mph. .WEDNESDAY THROUGH THURSDAY...Partly cloudy with chance of showers and thunderstorms. Lows 43 to 48. Highs 66 to 71. West winds around 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the lower 70s. .SATURDAY...Cooler. Mostly sunny. Chance of showers and slight chance of thunderstorms in the morning, then chance of showers and thunderstorms in the afternoon. Highs in the lower 60s. $$ WYZ140-221215- Yellowstone National Park- Including the cities of Lake, Mammoth, and Old Faithful 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of showers and thunderstorms late in the afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....63-68. 24 hr trend......1 degree cooler. Min humidity........38-44 percent. 24 hr trend......7 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west around 10 mph. Gusts up to 15 mph. Ridge top winds.....West 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing Height.......2000-4000 ft agl until 1200, then 6000-8000 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .TONIGHT... Sky/weather.........Partly cloudy. Chance of showers in the evening. Slight chance of thunderstorms through the night. Slight chance of showers after midnight. Chance of precipitation 50 percent. Chance of thunder...20 percent. Min temperature.....39-44. 24 hr trend......1 degree cooler. Max humidity........78-84 percent. 24 hr trend......13 percent drier. Humidity recovery...Excellent. 20-foot winds.......Downslope/downvalley 4-7 mph. Ridge top winds.....Southwest around 10 mph until 2400, then east. Chc of wetting rain.Less than 5 percent. Transport winds.....West around 10 mph until 2400, then southeast. Mixing Height.......2600-4600 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Poor to fair until 2400, then poor. .MONDAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Slight chance of showers and thunderstorms in the afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....64-69. 24 hr trend......1 degree warmer. Min humidity........34-40 percent. 24 hr trend......6 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west around 10 mph with gusts to around 25 mph. Ridge top winds.....West 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph until 1200, then around 20 mph. Mixing Height.......2400-4400 ft agl until 1200, then 7400-9400 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good to excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Mostly clear. Lows in the upper 30s. Winds generally less than 10 mph. .TUESDAY...Mostly clear. Lows in the upper 30s. Highs in the upper 60s. Winds generally less than 10 mph. .WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 40 to 45. Highs in the lower 70s. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows in the lower 40s. Highs in the lower 70s. .SATURDAY...Cooler. Partly cloudy. Chance of showers and slight chance of thunderstorms in the morning, then chance of showers and thunderstorms in the afternoon. Highs in the upper 50s. $$ WYZ415-221215- North Zone Bridger Teton NF and Grand Teton NP- Including the cities of Jackson and Moran 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of showers and thunderstorms early in the afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....61-66. 24 hr trend......2 degrees cooler. Min humidity........43-49 percent. 24 hr trend......3 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west around 10 mph. Gusts up to 20 mph. Ridge top winds.....Northwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest 10 to 15 mph. Mixing Height.......1800-3800 ft agl until 1200, then 5600-7600 ft agl. Smoke dispersal.....Poor until 1200, then good to very good. .TONIGHT... Sky/weather.........Partly cloudy. Slight chance of showers and thunderstorms late in the evening. Chance of precipitation 20 percent. Chance of thunder...0 percent. Min temperature.....38-43. 24 hr trend......1 degree cooler. Max humidity........68-74 percent. 24 hr trend......24 percent drier. Humidity recovery...Good. 20-foot winds.......West winds around 10 mph until 2100, then downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....West around 10 mph until 2400, then south. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph until 2400, then south. Mixing Height.......3200-5200 ft agl until 2400, then 600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .MONDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....64-69. 24 hr trend......3 degrees warmer. Min humidity........25-31 percent. 24 hr trend......13 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west 10 to 15 mph. Gusts up to 25 mph. Ridge top winds.....Southwest around 10 mph until 1200, then west around 20 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph until 1200, then west around 25 mph. Mixing Height.......2800-4800 ft agl until 1200, then 7600-9400 ft agl. Smoke dispersal.....Fair to good until 1200, then excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Clear. Lows around 40. Winds generally less than 10 mph. .TUESDAY...Clear. Lows in the lower 40s. Highs in the lower 70s. Winds generally less than 10 mph. .WEDNESDAY THROUGH THURSDAY...Mostly clear. Lows in the mid 40s. Highs in the lower 70s. Southwest winds around 10 mph. .FRIDAY...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows in the mid 40s. Highs in the lower 70s. .SATURDAY...Cooler. Partly cloudy. Chance of showers and slight chance of thunderstorms in the morning, then chance of showers and thunderstorms in the afternoon. Highs around 60. $$ WYZ416-221215- West Wind River Mountains/East Zone Bridger Teton NF- 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of showers and thunderstorms late in the morning. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....58-63. 24 hr trend......4 degrees cooler. Min humidity........39-45 percent. 24 hr trend......2 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then northwest 10 to 15 mph. Gusts up to 20 mph. Ridge top winds.....Northwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 15 mph. Mixing Height.......2000-4000 ft agl until 1200, then 5600-7600 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....38-43. 24 hr trend......1 degree warmer. Max humidity........67-73 percent. 24 hr trend......27 percent drier. Humidity recovery...Good. 20-foot winds.......West winds around 10 mph and gusty until 2100, then downslope/downvalley 4-7 mph. Ridge top winds.....Northwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 15 mph until 2400, then southwest. Mixing Height.......3000-5000 ft agl until 2400, then 600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .MONDAY... Sky/weather.........Partly cloudy then becoming mostly sunny. Chance of thunder...0 percent. Max temperature.....62-67. 24 hr trend......4 degrees warmer. Min humidity........22-28 percent. 24 hr trend......16 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west 15 to 20 mph with gusts to around 35 mph. Ridge top winds.....West 15 to 20 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph until 1200, then west around 25 mph. Mixing Height.......3000-5000 ft agl until 1200, then 8000-10000 ft agl. Smoke dispersal.....Good until 1200, then excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Clear. Lows in the upper 30s. Winds generally less than 10 mph. .TUESDAY...Clear. Lows around 40. Highs in the upper 60s. West winds around 10 mph. .WEDNESDAY THROUGH THURSDAY...Mostly clear. Lows in the lower 40s. Highs around 70. West winds around 10 mph. .FRIDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the lower 40s. Highs around 70. .SATURDAY...Cooler. Partly cloudy. Chance of showers in the morning, then chance of showers and thunderstorms in the afternoon. Highs around 60. $$ WYZ288-221215- East Wind River Mountains/South Shoshone NF- Including the cities of Dubois and South Pass 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of showers in the morning. Slight chance of thunderstorms through the day. Chance of showers in the afternoon. Chance of precipitation 50 percent. Chance of thunder...20 percent. Max temperature.....60-65. 24 hr trend......6 degrees cooler. Min humidity........43-49 percent. 24 hr trend......8 percent wetter. 20-foot winds.......Northwest winds around 10 mph with higher gusts. Ridge top winds.....Northwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 15 mph. Mixing Height.......1800-3800 ft agl until 1200, then 5400-7400 ft agl. Smoke dispersal.....Fair to good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....40-45. 24 hr trend......Unchanged. Max humidity........60-66 percent. 24 hr trend......13 percent drier. Humidity recovery...Good. 20-foot winds.......Northwest winds around 10 mph until 2100, then downslope/downvalley 4-7 mph. Gusts up to 20 mph. Ridge top winds.....West around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph. Mixing Height.......2800-4800 ft agl until 2400, then 600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .MONDAY... Sky/weather.........Partly cloudy then becoming mostly sunny. Chance of thunder...0 percent. Max temperature.....65-70. 24 hr trend......5 degrees warmer. Min humidity........25-31 percent. 24 hr trend......17 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west 15 to 20 mph. Gusts up to 35 mph. Ridge top winds.....West around 15 mph until 1200, then around 25 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 15 mph until 1200, then around 25 mph. Mixing Height.......3400-5400 ft agl until 1200, then 9000-11000 ft agl. Smoke dispersal.....Good until 1200, then excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Clear. Lows in the lower 40s. Northwest winds around 10 mph. .TUESDAY THROUGH WEDNESDAY...Mostly clear. Lows 43 to 48. Highs in the lower 70s. Northwest winds around 10 mph. .THURSDAY...Mostly clear. Lows in the upper 40s. Highs in the lower 70s. West winds around 10 mph. .FRIDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the mid 70s. .SATURDAY...Mostly sunny. Slight chance of showers in the morning, then chance of showers and thunderstorms in the afternoon. Highs in the mid 60s. $$ WYZ414-221215- Salt and Wyoming Ranges/West Zone Bridger Teton NF- Including the city of Afton 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....63-68. 24 hr trend......2 degrees cooler. Min humidity........33-39 percent. 24 hr trend......5 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then northwest 10 to 15 mph. Gusts up to 25 mph. Ridge top winds.....Northwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest 15 to 20 mph. Mixing Height.......2000-4000 ft agl until 1200, then 6200-8200 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....40-45. 24 hr trend......2 degrees warmer. Max humidity........67-73 percent. 24 hr trend......30 percent drier. Humidity recovery...Good. 20-foot winds.......West winds around 10 mph with gusts to around 25 mph until 2100, then downslope/downvalley 4-7 mph. Ridge top winds.....West around 15 mph until 2400, then south. Chc of wetting rain.Zero percent. Transport winds.....West around 15 mph until 2400, then south. Mixing Height.......3200-5200 ft agl until 2400, then 600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .MONDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....66-71. 24 hr trend......4 degrees warmer. Min humidity........18-24 percent. 24 hr trend......13 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west around 15 mph. Gusts up to 30 mph. Ridge top winds.....West 15 to 20 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph until 1200, then west around 25 mph. Mixing Height.......3000-5000 ft agl until 1200, then 8000-9400 ft agl. Smoke dispersal.....Good until 1200, then excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Clear. Lows in the lower 40s. Winds generally less than 10 mph. .TUESDAY...Clear. Lows in the mid 40s. Highs in the mid 70s. Winds generally less than 10 mph. .WEDNESDAY THROUGH THURSDAY...Mostly clear. Lows in the upper 40s. Highs in the mid 70s. Southwest winds around 10 mph. .FRIDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the mid 40s. Highs in the mid 70s. .SATURDAY...Cooler. Partly cloudy. Chance of showers and slight chance of thunderstorms in the morning, then chance of showers and thunderstorms in the afternoon. Highs in the lower 60s. $$ WYZ278-221215- Upper Green River Basin/Rock Springs BLM- Including the cities of Big Piney, Farson, and Pinedale 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Max temperature.....66-71. 24 hr trend......4 degrees cooler. Min humidity........24-30 percent. 24 hr trend......2 percent wetter. 20-foot winds.......Northwest winds 10 to 15 mph with gusts to around 25 mph. Ridge top winds.....Northwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest 15 to 20 mph. Mixing Height.......2800-4800 ft agl until 1200, then 8200-10200 ft agl. Smoke dispersal.....Fair to good until 1200, then very good to excellent. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....39-44. 24 hr trend......Unchanged. Max humidity........64-70 percent. 24 hr trend......16 percent drier. Humidity recovery...Good. 20-foot winds.......Northwest winds around 10 mph and gusty until 2100, then downslope/downvalley 4-7 mph. Ridge top winds.....Northwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 15 mph until 2400, then northeast. Mixing Height.......4200-6200 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Good until 2400, then poor. .MONDAY... Sky/weather.........Partly cloudy then becoming mostly sunny. Chance of thunder...0 percent. Max temperature.....70-75. 24 hr trend......4 degrees warmer. Min humidity........14-20 percent. 24 hr trend......12 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west 15 to 20 mph with gusts to around 35 mph. Ridge top winds.....West around 10 mph until 1200, then around 25 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph until 1200, then west around 25 mph. Mixing Height.......3400-5400 ft agl until 1200, then 9400-11400 ft agl. Smoke dispersal.....Good until 1200, then excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Clear. Lows in the lower 40s. North winds around 10 mph. .TUESDAY THROUGH THURSDAY...Mostly clear. Lows in the mid 40s. Highs in the lower 80s. West winds around 10 mph. .FRIDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the mid 40s. Highs in the lower 80s. .SATURDAY...Cooler. Mostly sunny. Slight chance of showers in the morning, then slight chance of showers and thunderstorms in the afternoon. Highs in the lower 70s. $$ WYZ277-221215- Lincoln and Uinta Counties/Lower Elevations- Including the cities of Evanston, Fort Bridger, and Kemmerer 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....68-73. 24 hr trend......3 degrees cooler. Min humidity........22-28 percent. 24 hr trend......2 percent drier. 20-foot winds.......West winds 10 to 15 mph. Gusts up to 15 mph until 1200, then 25 mph. Ridge top winds.....West 15 to 20 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest 15 to 20 mph. Mixing Height.......2400-4400 ft agl until 1200, then 7600-9600 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....42-47. 24 hr trend......2 degrees warmer. Max humidity........63-69 percent. 24 hr trend......21 percent drier. Humidity recovery...Good. 20-foot winds.......Northwest winds around 10 mph with gusts to around 25 mph until 2100, then downslope/downvalley 4-7 mph. Ridge top winds.....Northwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest 10 to 15 mph. Mixing Height.......4000-6000 ft agl until 2400, then 600 ft agl. Smoke dispersal.....Good until 2400, then poor. .MONDAY... Sky/weather.........Partly cloudy then becoming sunny. Chance of thunder...0 percent. Max temperature.....72-77. 24 hr trend......4 degrees warmer. Min humidity........14-20 percent. 24 hr trend......7 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900. Winds west around 20 mph with gusts to around 30 mph after 1500. Ridge top winds.....West around 10 mph until 1200, then around 20 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph until 1200, then west around 25 mph. Mixing Height.......3400-5400 ft agl until 1200, then 9200-11200 ft agl. Smoke dispersal.....Fair to good until 1200, then excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Clear. Lows in the mid 40s. Winds generally less than 10 mph. .TUESDAY THROUGH WEDNESDAY...Mostly clear. Lows in the upper 40s. Highs 79 to 84. Northwest winds around 10 mph. .THURSDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the lower 80s. West winds around 10 mph. .FRIDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the lower 80s. .SATURDAY...Cooler. Mostly sunny. Slight chance of showers in the morning, then slight chance of showers and thunderstorms in the afternoon. Highs around 70. $$ WYZ279-221215- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Including the cities of Green River, Rock Springs, and Wamsutter 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....72-77. 24 hr trend......5 degrees cooler. Min humidity........18-24 percent. 24 hr trend......3 percent wetter. 20-foot winds.......West winds around 15 mph with gusts to around 30 mph. Ridge top winds.....West around 20 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 20 mph. Mixing Height.......2400-4400 ft agl until 1200, then 8400-10400 ft agl. Smoke dispersal.....Fair to good until 1200, then very good to excellent. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....47-52. 24 hr trend......Unchanged. Max humidity........58-64 percent. 24 hr trend......9 percent drier. Humidity recovery...Good. 20-foot winds.......Northwest winds 10 to 15 mph with gusts to around 25 mph until 2400, then downslope/downvalley 4-7 mph. Ridge top winds.....Northwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 15 mph until 2400, then north. Mixing Height.......4800-6800 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Good to very good until 2400, then poor. .MONDAY... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Max temperature.....76-81. 24 hr trend......4 degrees warmer. Min humidity........17-23 percent. 24 hr trend......4 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900. Winds west around 20 mph with gusts to around 30 mph after 1500. Ridge top winds.....West around 10 mph until 1200, then around 20 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph until 1200, then around 25 mph. Mixing Height.......3600-5600 ft agl until 1200, then 11000-13000 ft agl. Smoke dispersal.....Good until 1200, then excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Mostly clear. Lows in the mid 40s. North winds around 10 mph. .TUESDAY THROUGH WEDNESDAY...Mostly clear. Lows in the upper 40s. Highs in the mid 80s. North winds around 10 mph. .THURSDAY...Mostly clear. Lows in the upper 40s. Highs in the mid 80s. Southwest winds around 10 mph. .FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of showers and thunderstorms. Lows in the lower 50s. Highs 79 to 84. $$ WYZ289-221215- Granite/Green/Ferris/Rattlesnake Mountains- Including the city of Jeffrey City 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of showers and thunderstorms in the afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....67-72. 24 hr trend......8 degrees cooler. Min humidity........26-32 percent. 24 hr trend......3 percent wetter. 20-foot winds.......Northwest winds 10 to 15 mph with gusts to around 25 mph. Ridge top winds.....Northwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 15 mph. Mixing Height.......2000-4000 ft agl until 1200, then 6200-8200 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....45-50. 24 hr trend......1 degree cooler. Max humidity........71-77 percent. 24 hr trend......7 percent wetter. Humidity recovery...Excellent. 20-foot winds.......North winds around 10 mph until 2100, then east until 2400, then downslope/downvalley 4-7 mph. Gusts up to 20 mph. Ridge top winds.....Northeast around 15 mph until 2400, then east. Chc of wetting rain.Zero percent. Transport winds.....Northeast around 15 mph until 2400, then east. Mixing Height.......3200-5200 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .MONDAY... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Max temperature.....75-80. 24 hr trend......6 degrees warmer. Min humidity........14-20 percent. 24 hr trend......13 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west 10 to 15 mph with gusts to around 30 mph until 1500, then around 20 mph with gusts to around 30 mph. Ridge top winds.....Southwest around 10 mph until 1200, then west around 25 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph until 1200, then west around 25 mph. Mixing Height.......3400-5400 ft agl until 1200, then 10800-12800 ft agl. Smoke dispersal.....Good until 1200, then excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Mostly clear. Lows in the mid 40s. North winds around 15 mph. .TUESDAY...Mostly clear. Lows in the mid 40s. Highs in the upper 70s. Northeast winds around 10 mph. .WEDNESDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the upper 70s. Northeast winds around 10 mph. .THURSDAY...Mostly clear. Lows around 50. Highs in the lower 80s. West winds around 10 mph. .FRIDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the lower 50s. Highs in the mid 80s. .SATURDAY...Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. $$ WYZ300-221215- Casper Mountain- 401 AM MDT Sun Jun 21 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of thunderstorms in the morning. Chance of showers through the day. Chance of thunderstorms in the afternoon. Chance of precipitation 40 percent. Chance of thunder...30 percent. Max temperature.....65-70. 24 hr trend......11 degrees cooler. Min humidity........41-47 percent. 24 hr trend......11 percent wetter. 20-foot winds.......West winds 10 to 15 mph until 1500, then northwest. Gusts up to 25 mph. Ridge top winds.....Northwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest 15 to 20 mph. Mixing Height.......1400-3400 ft agl until 1200, then 4800-6000 ft agl. Smoke dispersal.....Poor to fair until 1200, then good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....44-49. 24 hr trend......2 degrees cooler. Max humidity........73-79 percent. 24 hr trend......1 percent drier. Humidity recovery...Excellent. 20-foot winds.......North winds around 10 mph until 2100, then downslope/downvalley 4-7 mph until 0300, then southeast around 10 mph. Gusts up to 15 mph. Ridge top winds.....Northeast around 10 mph until 2400, then southeast. Chc of wetting rain.Zero percent. Transport winds.....Northeast around 15 mph until 2400, then southeast. Mixing Height.......2000-4000 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Poor. .MONDAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Slight chance of showers and thunderstorms in the afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....73-78. 24 hr trend......8 degrees warmer. Min humidity........25-31 percent. 24 hr trend......17 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west 10 to 15 mph with gusts to around 25 mph until 1500, then northwest with gusts to around 25 mph. Ridge top winds.....South around 10 mph until 1200, then west. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph until 1200, then west around 25 mph. Mixing Height.......3000-5000 ft agl until 1200, then 7800-9800 ft agl. Smoke dispersal.....Fair to good until 1200, then excellent. .Forecast days 3 through 7...... .MONDAY NIGHT...Partly cloudy. Lows in the mid 40s. North winds around 10 mph. .TUESDAY...Partly cloudy. Lows in the mid 40s. Highs in the lower 70s. Winds generally less than 10 mph. .WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 46 to 51. Highs 72 to 77. Southeast winds around 10 mph. .FRIDAY...Partly cloudy. Lows in the mid 50s. Highs in the lower 80s. .SATURDAY...Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. $$