FNUS55 KPSR 210731 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 1231 AM MST Sun Jun 21 2026 .DISCUSSION... Very dry conditions will continue into Monday with near normal temperatures beginning to rise. Afternoon MinRHs will remain in the single digits through Monday before gradually improving into the middle part of the week. Overnight recoveries will remain poor, ranging between 15-35% through Monday night. Some afternoon and early evening upslope breeziness will be common, but gusts will mostly stay below 20 mph. The very low RHs and afternoon breezes should lead to elevated fire weather conditions during the latter half of the afternoon/early evening hours. Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-211945- West Central Deserts/Northwest Maricopa County/Greater Phoenix Area/Southwest Deserts/Southwest Maricopa County/ Northwest and North-Central Pinal County- Phoenix BLM/YUM BLM/CAZ-CRZ- 1231 AM MST Sun Jun 21 2026 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................100-106. * 24 hr trend..................Little change. * Min Humidity....................5-9 pct. * 24 hr trend..................Little change. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............Southwest 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. * Mixing Height for Phoenix.......8400 ft AGL. * Transport Wind for Phoenix......Southwest 5 knots. * Dispersion for Phoenix..........Good. .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................69-79. * 24 hr trend..................Little change. * Max Humidity....................16-28 pct. * 24 hr trend..................Little change. * Winds - 20 foot...Slope/Valley..Southwest 5 to 10 mph in the evening becoming south after midnight. * Winds...10000 FT MSL............Southwest 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .MONDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................102-108. * 24 hr trend..................Little change. * Min Humidity....................7-11 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southeast 5 to 10 mph in the morning becoming southwest in the afternoon. * Winds...10000 FT MSL............Southwest 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. * Mixing Height for Phoenix.......8100 ft AGL. * Transport Wind for Phoenix......Southwest 9 knots. * Dispersion for Phoenix..........Very good. .EXTENDED... .TUESDAY...Mostly clear. Lows 74-84. Highs 104-110. Southwest winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .WEDNESDAY...Mostly clear. Lows 77-87. Highs 106-112. Southwest winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .THURSDAY...Mostly clear. Lows 79-89. Highs 107-113. Southwest winds 10 to 20 mph. Minimum relative humidity may be lower than 15 percent. .FRIDAY...Mostly clear. Lows 76-86. Highs 105-112. .SATURDAY...Clear. Lows 73-83. Highs 103-109. $$ AZZ131-CAZ231-211945- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 1231 AM MST Sun Jun 21 2026 /1231 AM PDT Sun Jun 21 2026/ .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................102-107. * 24 hr trend..................Little change. * Min Humidity....................6-10 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............Southwest 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. * Mixing Height for Yuma..........7900 ft AGL. * Transport Wind for Yuma.........South 8 knots. * Dispersion for Yuma.............Good. .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................68-73. * 24 hr trend..................Little change. * Max Humidity....................28-42 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............Southwest 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .MONDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................103-109. * 24 hr trend..................Little change. * Min Humidity....................8-12 pct. * 24 hr trend..................3 pct wetter. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. * Mixing Height for Yuma..........6200 ft AGL. * Transport Wind for Yuma.........South 13 knots. * Dispersion for Yuma.............Very good. .EXTENDED... .TUESDAY...Mostly clear. Lows 74-81. Highs 105-111. South winds 10 to 20 mph. Minimum relative humidity may be lower than 15 percent. .WEDNESDAY...Mostly clear. Lows 77-84. Highs 108-113. South winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 79-84. Highs 110-115. Southwest winds 10 to 20 mph. Minimum relative humidity may be lower than 15 percent. .FRIDAY...Mostly clear. Lows 76-83. Highs 108-113. .SATURDAY...Clear. Lows 72-80. Highs 106-111. $$ AZZ133-211945- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 1231 AM MST Sun Jun 21 2026 .TODAY... * Sky/weather.....................Sunny. Areas of smoke in the morning. * Max Temperature.................89-103. * 24 hr trend..................Little change. * Min Humidity....................4-8 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............Southwest 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .TONIGHT... * Sky/weather.....................Mostly clear. Areas of smoke after midnight. * Min Temperature.................57-73. * 24 hr trend..................Little change. * Max Humidity....................15-22 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..West 5 to 10 mph in the evening becoming north after midnight. * Winds...10000 FT MSL............Southwest 10 to 20 mph in the evening becoming 20 to 30 mph after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .MONDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................92-105. * 24 hr trend..................Little change. * Min Humidity....................7-11 pct. * 24 hr trend..................3 pct wetter. * Winds - 20 foot...Slope/Valley..South 5 to 10 mph in the morning becoming west 5 to 15 mph in the afternoon. * Winds...10000 FT MSL............West 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .EXTENDED... .TUESDAY...Mostly clear. Lows 62-80. Highs 95-108. Northwest winds 10 to 20 mph. Minimum relative humidity may be lower than 15 percent. .WEDNESDAY...Mostly clear. Lows 64-82. Highs 95-109. West winds 10 to 20 mph. Minimum relative humidity may be lower than 15 percent. .THURSDAY...Mostly clear. Lows 64-82. Highs 94-108. West winds 10 to 20 mph. .FRIDAY...Mostly clear. Lows 63-81. Highs 91-107. .SATURDAY...Clear. Lows 61-79. Highs 89-104. $$ CAZ232-211945- Imperial County And Eastern Riverside County- 1231 AM PDT Sun Jun 21 2026 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................96-106. * 24 hr trend..................Little change. * Min Humidity....................4-10 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............Southwest 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................70-76. * 24 hr trend..................Little change. * Max Humidity....................19-44 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............Southwest 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .MONDAY... * Sky/weather.....................Sunny. * Max Temperature.................97-107. * 24 hr trend..................Little change. * Min Humidity....................8-14 pct. * 24 hr trend..................4 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .EXTENDED... .TUESDAY...Mostly clear. Lows 74-85. Highs 100-110. South winds 5 to 15 mph. .WEDNESDAY...Mostly clear. Lows 78-87. Highs 102-113. South winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 78-87. Highs 103-114. Southwest winds 15 to 25 mph. Minimum relative humidity may be lower than 15 percent. .FRIDAY...Mostly clear. Lows 75-85. Highs 102-112. .SATURDAY...Clear. Lows 72-81. Highs 99-109. $$ CAZ230-211945- Joshua Tree National Park- 1231 AM PDT Sun Jun 21 2026 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................86-101. * 24 hr trend..................Little change. * Min Humidity....................6-11 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..West 5 to 10 mph in the morning becoming southwest in the afternoon. * Winds...10000 FT MSL............Southwest 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .TONIGHT... * Sky/weather.....................Clear. * Min Temperature.................61-73. * 24 hr trend..................Little change. * Max Humidity....................19-25 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............Light and variable in the evening becoming southwest 5 to 15 mph after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .MONDAY... * Sky/weather.....................Sunny. * Max Temperature.................88-102. * 24 hr trend..................Little change. * Min Humidity....................8-12 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............Southwest 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .EXTENDED... .TUESDAY...Mostly clear. Lows 67-83. Highs 91-105. Southwest winds 10 to 20 mph. Minimum relative humidity may be lower than 15 percent. .WEDNESDAY...Mostly clear. Lows 71-84. Highs 93-107. Southwest winds 10 to 20 mph. .THURSDAY...Mostly clear. Lows 67-84. Highs 92-108. West winds 10 to 20 mph. Minimum relative humidity may be lower than 15 percent. .FRIDAY...Clear. Lows 63-81. Highs 90-106. .SATURDAY...Clear. Lows 60-78. Highs 87-104. $$ .8 TO 10 DAY OUTLOOK...Sunday June 28th through Tuesday June 30th: Near normal temperatures and near median precipitation.