810 FNUS55 KPSR 250826 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 126 AM MST Thu Sep 25 2025 .DISCUSSION... Today will bring more hot temperatures to the lower deserts, but moisture will be on the increase. Expect isolated to scattered thunderstorms over the eastern districts starting this afternoon with outflow easterly winds into the south-central Arizona lower deserts. MinRH values will hover around 20% today across the lower deserts before increasing Friday into Saturday with values upwards of 50% over the eastern districts. Friday is expected to bring fairly widespread showers and thunderstorms across the eastern districts with heavy rainfall likely in some areas. ...Thunderstorms imply gusty winds... Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-252030- 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- 126 AM MST Thu Sep 25 2025 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................98-106. * 24 hr trend..................Little change. * Min Humidity....................19-24 pct. * 24 hr trend..................4 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 10 mph in the morning becoming southwest 5 to 15 mph in the afternoon. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............3 percent. * Mixing Height for Phoenix.......12700 ft AGL. * Transport Wind for Phoenix......Southwest 16 knots. * Dispersion for Phoenix..........Excellent. .TONIGHT... * Sky/weather.....................Mostly clear. Slight chance of showers and thunderstorms. * Min Temperature.................70-80. * 24 hr trend..................6 degrees cooler. * Max Humidity....................46-66 pct. * 24 hr trend..................16 pct wetter. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............Southwest 20 to 30 mph. * Chance of Precip................10 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............7 percent. .FRIDAY... * Sky/weather.....................Partly sunny. Chance of thunderstorms in the morning. chance of showers . slight chance of thunderstorms in the afternoon. * Max Temperature.................87-94. * 24 hr trend..................12 degrees cooler. * Min Humidity....................22-41 pct. * 24 hr trend..................9 pct wetter. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 20 to 30 mph. * Chance of Precip................30 percent. * CWR (>= 0.10 IN)................0 percent west portion...40 percent east portion. * Chance of Thunder...............16 percent. * Mixing Height for Phoenix.......10000 ft AGL. * Transport Wind for Phoenix......South 14 knots. * Dispersion for Phoenix..........Excellent. .EXTENDED... .SATURDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 66-76. Highs 84-91. Southeast winds 5 to 15 mph. .SUNDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 66-76. Highs 84-91. Southeast winds 5 to 10 mph. .MONDAY...Clear. Lows 66-76. Highs 87-94. Southeast winds 5 to 10 mph. .TUESDAY...Mostly clear. Lows 67-77. Highs 89-96. .WEDNESDAY...Mostly clear. Lows 66-76. Highs 88-95. $$ AZZ131-CAZ231-252030- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 126 AM MST Thu Sep 25 2025 /126 AM PDT Thu Sep 25 2025/ .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................99-104. * 24 hr trend..................3 degrees cooler. * Min Humidity....................16-21 pct. * 24 hr trend..................3 pct drier. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............South 25 to 35 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. * Mixing Height for Yuma..........7200 ft AGL. * Transport Wind for Yuma.........Southwest 9 knots. * Dispersion for Yuma.............Good. .TONIGHT... * Sky/weather.....................Clear. * Min Temperature.................68-73. * 24 hr trend..................8 degrees cooler. * Max Humidity....................46-64 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............South 25 to 35 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .FRIDAY... * Sky/weather.....................Mostly sunny. Slight chance of showers in the afternoon. * Max Temperature.................89-94. * 24 hr trend..................9 degrees cooler. * Min Humidity....................24-31 pct. * 24 hr trend..................8 pct wetter. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph in the morning becoming southeast 5 to 15 mph in the afternoon. * Chance of Precip................0 percent in the morning becoming 10 percent in the afternoon. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............1 percent. * Mixing Height for Yuma..........8600 ft AGL. * Transport Wind for Yuma.........West 8 knots. * Dispersion for Yuma.............Fair. .EXTENDED... .SATURDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 67-74. Highs 87-92. Southeast winds 5 to 15 mph. .SUNDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 67-73. Highs 87-92. Southeast winds 5 to 10 mph. .MONDAY...Clear. Lows 68-73. Highs 91-96. South winds 5 to 10 mph. .TUESDAY...Mostly clear. Lows 66-73. Highs 91-96. .WEDNESDAY...Mostly clear. Lows 66-71. Highs 90-95. $$ AZZ133-252030- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 126 AM MST Thu Sep 25 2025 .TODAY... * Sky/weather.....................Sunny in the morning becoming partly sunny in the afternoon. Chance of showers and thunderstorms in the afternoon. * Max Temperature.................84-101. * 24 hr trend..................Little change. * Min Humidity....................25-36 pct. * 24 hr trend..................10 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 15 mph in the morning becoming south in the afternoon. * Winds...10000 FT MSL............Southwest 10 to 20 mph. * Chance of Precip................0 percent in the morning becoming 50 percent in the afternoon. * CWR (>= 0.10 IN)................20 percent. * Chance of Thunder...............50 percent. .TONIGHT... * Sky/weather.....................Mostly cloudy in the evening becoming partly cloudy after midnight. Chance of showers and thunderstorms. * Min Temperature.................56-71. * 24 hr trend..................6 degrees cooler. * Max Humidity....................65-90 pct. * 24 hr trend..................24 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 15 mph. * Winds...10000 FT MSL............Southwest 20 to 30 mph. * Chance of Precip................60 percent. * CWR (>= 0.10 IN)................40 percent. * Chance of Thunder...............51 percent. .FRIDAY... * Sky/weather.....................Mostly cloudy. Showers likely and chance of thunderstorms in the morning becoming showers with thunderstorms likely in the afternoon. * Max Temperature.................74-88. * 24 hr trend..................12 degrees cooler. * Min Humidity....................39-57 pct. * 24 hr trend..................19 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............South 20 to 30 mph. * Chance of Precip................80 percent. * CWR (>= 0.10 IN)................80 percent. * Chance of Thunder...............60 percent. .EXTENDED... .SATURDAY...Partly cloudy with chance of showers and thunderstorms. Lows 53-69. Highs 71-85. Southeast winds 5 to 15 mph. .SUNDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 52-67. Highs 71-85. Southeast winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 52-69. Highs 74-89. East winds 5 to 15 mph. .TUESDAY...Mostly clear. Lows 54-69. Highs 76-91. .WEDNESDAY...Mostly clear. Lows 54-69. Highs 77-91. $$ CAZ232-252030- Imperial County And Eastern Riverside County- 126 AM PDT Thu Sep 25 2025 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................92-102. * 24 hr trend..................3 degrees cooler. * Min Humidity....................13-21 pct. * 24 hr trend..................7 pct drier. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............Southwest 25 to 35 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .TONIGHT... * Sky/weather.....................Clear. * Min Temperature.................67-74. * 24 hr trend..................7 degrees cooler. * Max Humidity....................46-64 pct. * 24 hr trend..................5 pct wetter. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............Southwest 20 to 30 mph in the evening becoming 10 to 20 mph after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .FRIDAY... * Sky/weather.....................Mostly sunny. Slight chance of showers in the afternoon. * Max Temperature.................85-94. * 24 hr trend..................8 degrees cooler. * Min Humidity....................23-35 pct. * 24 hr trend..................11 pct wetter. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............Light and variable in the morning becoming northeast 5 to 15 mph in the afternoon. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............2 percent. .EXTENDED... .SATURDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 67-74. Highs 82-91. Southeast winds 5 to 15 mph. .SUNDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 67-74. Highs 82-92. South winds 5 to 10 mph. .MONDAY...Clear. Lows 68-74. Highs 86-95. South winds 5 to 10 mph. .TUESDAY...Mostly clear. Lows 65-73. Highs 86-95. .WEDNESDAY...Mostly clear. Lows 65-72. Highs 85-93. $$ CAZ230-252030- Joshua Tree National Park- 126 AM PDT Thu Sep 25 2025 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................81-96. * 24 hr trend..................3 degrees cooler. * Min Humidity....................14-26 pct. * 24 hr trend..................8 pct drier. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............South 20 to 30 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .TONIGHT... * Sky/weather.....................Clear. * Min Temperature.................56-70. * 24 hr trend..................7 degrees cooler. * Max Humidity....................51-64 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph. * Winds...10000 FT MSL............South 5 to 15 mph in the evening becoming light and variable after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............1 percent. .FRIDAY... * Sky/weather.....................Mostly sunny. Slight chance of showers in the afternoon. * Max Temperature.................76-87. * 24 hr trend..................7 degrees cooler. * Min Humidity....................28-39 pct. * 24 hr trend..................14 pct wetter. * Winds - 20 foot...Slope/Valley..North 5 to 15 mph. * Winds...10000 FT MSL............Light and variable in the morning becoming northeast 5 to 15 mph in the afternoon. * Chance of Precip................0 percent in the morning becoming 20 percent in the afternoon. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............5 percent. .EXTENDED... .SATURDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 57-71. Highs 72-84. South winds 5 to 15 mph. .SUNDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 57-69. Highs 72-84. South winds 5 to 15 mph. .MONDAY...Clear. Lows 56-69. Highs 75-87. Southwest winds 5 to 15 mph. .TUESDAY...Mostly clear. Lows 54-68. Highs 73-88. .WEDNESDAY...Mostly clear. Lows 54-66. Highs 74-86. $$ .8 TO 10 DAY OUTLOOK...Thursday October 2nd through Saturday October 4th: Near normal temperatures and above median precipitation.