FNUS55 KMSO 211034 FWFMSO Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho National Weather Service Missoula MT 434 AM MDT Sun Jun 21 2026 .DISCUSSION... Idaho (Zones 102 and 103): Temperatures will be slightly cooler today then a ridge of high pressure will be over the region Monday through Thursday. This ridge will bring hot and dry conditions over the region. Next weekend a significant low pressure system will move over the area causing cool and showery conditions. Northwest MT (Zones 104 and 105): Showers and thunderstorms are expected this afternoon and once again on Monday. Then a ridge of high pressure will be over the region Tuesday through Thursday. This ridge will bring hot and dry conditions over the region. Next weekend a significant low pressure system will move over the area causing cool and showery conditions. West Central MT (Zones 106, 107 and 108): Temperatures will be slightly cooler today. On Monday a few showers is expected to develop near the divide. Then a ridge of high pressure will be over the region Tuesday through Thursday. This ridge will bring hot and dry conditions over the region. Next weekend a significant low pressure system will move over the area causing cool and showery conditions. Southwest MT (Zones 109, 110 and 111): A few showers and thunderstorms are expected to develop this afternoon across the southern portion of zone 110/111. Then a ridge of high pressure will be over the region starting Tuesday through Thursday. This ridge will bring hot and dry conditions over the region. Next weekend a significant low pressure system will move over the area causing cool and showery conditions. View Weather Briefing videos on our YouTube channel at https://www.youtube.com/NWSMissoula IDZ102-103-221045- Palouse/Hells Canyon-Clearwater/Nez Perce- 334 AM PDT Sun Jun 21 2026 .TODAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....78-88 valleys and 65-75 ridges. * Min Humidity........19-29 percent. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph. * Ridge Top............West 5-15 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 0900. 8 kft agl after 1300. * Transport Winds.....West 10 mph until 1700, then 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .TONIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....40-50. * Max Humidity........60-70 percent valleys and 54-64 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 5-10 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............Northwest 10-20 mph decreasing to 5-10 mph after midnight. * Mixing Height.......7 kft agl until 2000. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....Northwest 15 mph until 2200, then variable less than 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....80-90 valleys and 65-75 ridges. * Min Humidity........13-23 percent valleys and 21-31 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph. * Ridge Top............Northwest 5-15 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 0900. 9 kft agl after 1200. * Transport Winds.....Variable less than 10 mph until 0800, then northwest 10 mph. * Chance Lightning....0 percent over the Palouse/Hells Canyon...and near 0 percent toward the Clearwater/Nez Perce. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Mostly clear. Lows 50-60. Highs 80-90. Min humidities 10-20 percent. Northeast winds 10-15 mph. .WEDNESDAY...Mostly clear. Lows 50-60. Highs 80-90. Min humidities 15-25 percent. North winds 5-10 mph. .THURSDAY...Partly cloudy. Lows 55-65. Highs 80-90. West winds 10-15 mph. .FRIDAY...Cooler. Partly cloudy with chance of rain showers. Chance of showers 40 percent. Lows 50-60. Highs 65-75. .SATURDAY...Mostly cloudy with rain likely and slight chance of thunderstorms. Chance of precipitation 60 percent. Lows 45-55. Highs 60-70. $$ MTZ104-105-221045- Kootenai-Flathead/Glacier Park- 434 AM MDT Sun Jun 21 2026 .TODAY... * Sky/Weather.........Partly cloudy. Slight chance of thunderstorms in the afternoon. * Max Temperature.....75-80 valleys and 58-68 ridges. * Min Humidity........19-29 percent valleys and 34-44 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 10-15 mph. * Ridge Top............West 10-20 mph. * Mixing Height.......1-2 kft agl until 0900. 9 kft agl after 1500. * Transport Winds.....Northwest 10 mph until 1100, then west 15 mph. * Chance Lightning....20 percent over the Kootenai...and 25 percent toward the Flathead/Glacier Park. * CWR (> 0.10 Inch)...10 percent. .TONIGHT... * Sky/Weather.........Partly cloudy. Chance of rain showers. * Min Temperature.....40-50. * Max Humidity........84-94 percent valleys and 71-81 percent ridges. * 20-Foot Winds....... * Lower Elevation......Downslope/downvalley 1-3 mph. * Ridge Top............Northwest 10-20 mph becoming west 5-10 mph after midnight. * Mixing Height.......8 kft agl until 2000. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....Northwest 15 mph until 0100, then north 10 mph. * Chance Lightning....Near 0 percent over the Kootenai...and 20 percent toward the Flathead/Glacier Park. * CWR (> 0.10 Inch)...10 percent. .MONDAY... * Sky/Weather.........Partly cloudy. Slight chance of thunderstorms in the afternoon. * Max Temperature.....70-80 valleys and 55-65 ridges. * Min Humidity........25-35 percent valleys and 45-55 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Northwest 5-10 mph. * Mixing Height.......1-2 kft agl until 0900. 10 kft agl after 1300. * Transport Winds.....Northwest 15 mph. * Chance Lightning....25 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Mostly clear. Lows 45-55. Highs 70-80. Min humidities 15-25 percent. Northeast winds 5-10 mph. .WEDNESDAY...Partly cloudy. Lows 50-60. Highs 75-85. Min humidities 10-20 percent. East winds 5-10 mph. .THURSDAY...Partly cloudy. Lows 50-60. Highs 75-85. South winds 10-15 mph. .FRIDAY...Cooler. Mostly cloudy with chance of rain. Chance of rain 30 percent. Lows 50-60. Highs 65-75. .SATURDAY...Cooler. Mostly cloudy with rain showers likely and slight chance of thunderstorms. Chance of precipitation 60 percent. Lows 45-55. Highs 55-65. $$ MTZ106-108-221045- West Lolo-East Lolo- 434 AM MDT Sun Jun 21 2026 .TODAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....70-80 valleys and 63-73 ridges. * Min Humidity........14-24 percent valleys and 24-34 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph. * Ridge Top............West 10-20 mph. * Mixing Height.......1-2 kft agl until 0900. 10 kft agl after 1300. * Transport Winds.....West 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .TONIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....40-50. * Max Humidity........66-76 percent valleys and 57-67 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 10-15 mph. * Ridge Top............Northwest 10-20 mph decreasing to 5-10 mph after midnight. * Mixing Height.......8 kft agl until 2000. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....West 15 mph until 2400, then variable less than 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Partly cloudy. Slight chance of thunderstorms in the afternoon. * Max Temperature.....70-80 valleys and 63-73 ridges. * Min Humidity........21-31 percent valleys and 29-39 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Northwest 10-15 mph. * Mixing Height.......1-2 kft agl until 0900. 9 kft agl after 1200. * Transport Winds.....Northwest 10 mph until 1200, then 15 mph. * Chance Lightning....20 percent over the West Lolo...and 25 percent toward the East Lolo. * CWR (> 0.10 Inch)...10 percent. .TUESDAY...Mostly clear. Lows 45-55. Highs 75-85. Min humidities 10-20 percent. Northeast winds 5-10 mph. .WEDNESDAY...Partly cloudy. Lows 50-60. Highs 75-85. Min humidities 10-20 percent. Northeast winds 5-10 mph. .THURSDAY...Partly cloudy. Lows 50-60. Highs 80-90. West winds 5-10 mph. .FRIDAY...Cooler. Mostly cloudy with chance of rain. Chance of rain 30 percent. Lows 55-65. Highs 65-75. .SATURDAY...Cooler. Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Chance of precipitation 40 percent. Lows 45-55. Highs 55-65. $$ MTZ107-221045- Flathead Reservation- 434 AM MDT Sun Jun 21 2026 .TODAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....80-85 valleys and 60-65 ridges. * Min Humidity........16-26 percent valleys and 25-35 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph. * Ridge Top............West 10-20 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 0900. 10 kft agl after 1300. * Transport Winds.....West 10 mph until 1100, then 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...10 percent. .TONIGHT... * Sky/Weather.........Partly cloudy. Slight chance of rain. * Min Temperature.....50-55 valleys and 40-45 ridges. * Max Humidity........57-67 percent. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............Northwest 10-20 mph becoming west 5-10 mph after midnight. * Mixing Height.......8 kft agl until 2000. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....West 15 mph until 0100, then variable less than 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Partly cloudy. Slight chance of thunderstorms in the afternoon. * Max Temperature.....75-80 valleys and 55-60 ridges. * Min Humidity........25-35 percent valleys and 33-43 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Northwest 5-15 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 0900. 8 kft agl after 1300. * Transport Winds.....Northwest 10 mph until 1600, then 15 mph. * Chance Lightning....20 percent. * CWR (> 0.10 Inch)...10 percent. .TUESDAY...Mostly clear. Lows 45-55. Highs 75-85. Min humidities 15-25 percent. Northeast winds 10-15 mph. .WEDNESDAY...Partly cloudy. Lows 50-60. Highs 80-90. Min humidities 10-20 percent. Northeast winds 5-10 mph. .THURSDAY...Partly cloudy. Lows 55-65. Highs 85-95. South winds 5-10 mph. .FRIDAY...Not as warm. Mostly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 55-65. Highs 70-80. .SATURDAY...Cooler. Mostly cloudy with chance of rain. Chance of rain 40 percent. Lows 50-60. Highs 60-70. $$ MTZ109-221045- Bitterroot- 434 AM MDT Sun Jun 21 2026 .TODAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....80-85 valleys and 60-65 ridges. * Min Humidity........10-20 percent valleys and 19-29 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to becoming northwest 5-15 mph in the afternoon. * Ridge Top............West 10-20 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 0900. 9 kft agl after 1300. * Transport Winds.....West 10 mph until 1200, then 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .TONIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....40-50. * Max Humidity........49-59 percent. * 20-Foot Winds....... * Lower Elevation......Northwest 10-15 mph in the evening becoming downslope/downvalley 5-10 mph. * Ridge Top............Northwest 10-20 mph decreasing to 5-10 mph after midnight. * Mixing Height.......7 kft agl until 2000. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....Northwest 15 mph until 2400, then variable less than 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....75-80 valleys and 60-65 ridges. * Min Humidity........17-27 percent valleys and 25-35 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 5-15 mph. * Ridge Top............Northwest 5-15 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 0800. 10 kft agl after 1300. * Transport Winds.....Northwest 10 mph until 1300, then 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Mostly clear. Lows 45-55. Highs 75-85. Min humidities 10-20 percent. Northeast winds 10-15 mph. .WEDNESDAY...Partly cloudy. Lows 50-60. Highs 75-85. Min humidities 10-20 percent. North winds 10-15 mph. .THURSDAY...Partly cloudy. Lows 50-60. Highs 80-90. West winds 10-15 mph. .FRIDAY...Cooler. Partly cloudy with chance of rain showers and slight chance of thunderstorms. Chance of precipitation 30 percent. Lows 50-60. Highs 65-75. .SATURDAY...Cooler. Mostly cloudy with rain showers likely and slight chance of thunderstorms. Chance of precipitation 60 percent. Lows 45-55. Highs 55-65. $$ MTZ110-111-221045- Deerlodge/West Beaverhead-East Beaverhead- 434 AM MDT Sun Jun 21 2026 .TODAY... * Sky/Weather.........Partly cloudy. Slight chance of showers and thunderstorms this afternoon. * Max Temperature.....70-80 valleys and 60-70 ridges. * Min Humidity........13-23 percent valleys and 23-33 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph. * Ridge Top............West 5-15 mph. * Mixing Height.......1-2 kft agl until 0900. 10 kft agl after 1500. * Transport Winds.....West 10 mph until 1200, then 15 mph. * Chance Lightning....Near 0 percent over the Deerlodge/West Beaverhead...and 20 percent toward the East Beaverhead. * CWR (> 0.10 Inch)...0 percent. .TONIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....40-45. * Max Humidity........69-79 percent valleys and 59-69 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 5-15 mph. * Ridge Top............Northwest 5-15 mph. * Mixing Height.......9 kft agl until 1900. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....West 15 mph until 2100, then north 10 mph. * Chance Lightning....Near 0 percent over the Deerlodge/West Beaverhead...and 20 percent toward the East Beaverhead. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....70-75 valleys and 60-65 ridges. * Min Humidity........17-27 percent. * 20-Foot Winds....... * Lower Elevation......Calm to becoming 5-15 mph in the afternoon. * Ridge Top............Northwest 5-15 mph. * Mixing Height.......Below 500 ft to 1 kft agl until0800. 10 kft agl after 1400. * Transport Winds.....Northwest 10 mph until 1200, then west 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Mostly clear. Lows 40-50. Highs 70-80. Min humidities 10-20 percent. North winds 10-15 mph. .WEDNESDAY...Partly cloudy. Lows 45-55. Highs 75-85. Min humidities 10-20 percent. North winds 10-15 mph. .THURSDAY...Partly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 45-55. Highs 75-85. West winds 10-15 mph. .FRIDAY...Partly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 50-60. Highs 70-80. .SATURDAY...Cooler. Mostly cloudy with chance of rain showers and thunderstorms. Chance of precipitation 40 percent. Lows 45-55. Highs 60-70. $$