393 FNUS55 KPSR 271058 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 358 AM MST Sat Sep 27 2025 .DISCUSSION... As a low pressure system meanders over Southern California, chances for wetting rainfall and isolated to scattered thunderstorms remain today, mainly focused over the high terrain of the eastern districts (20-50% CWR) and fairly widespread across the western districts (30-60% CWR). Rain chances will end across the area by Sunday evening, with only lingering chances over the AZ high terrain Sunday during the day. MinRHs will continue in the 30-45% range and temperatures in a 5-8 degrees below normal range areawide today and Sunday, with humidity gradually decreasing and temperatures gradually warming early next week. ...Thunderstorms imply gusty winds... Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-272300- 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- 358 AM MST Sat Sep 27 2025 .TODAY... * Sky/weather.....................Partly sunny. Slight chance of showers and thunderstorms in the morning becoming chance of showers and thunderstorms in the afternoon. * Max Temperature.................83-90. * 24 hr trend..................3 degrees cooler. * Min Humidity....................33-45 pct. * 24 hr trend..................9 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................40 percent. * CWR (>= 0.10 IN)................50 percent west portion...10 percent east portion. * Chance of Thunder...............32 percent. * Mixing Height for Phoenix.......9800 ft AGL. * Transport Wind for Phoenix......South 9 knots. * Dispersion for Phoenix..........Very good. .TONIGHT... * Sky/weather.....................Partly cloudy. Chance of thunderstorms in the evening. chance of showers . slight chance of thunderstorms after midnight. * Min Temperature.................65-75. * 24 hr trend..................Little change. * Max Humidity....................70-87 pct. * 24 hr trend..................6 pct wetter. * Winds - 20 foot...Slope/Valley..West 5 to 10 mph in the evening becoming southeast after midnight. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................40 percent. * CWR (>= 0.10 IN)................20 percent. * Chance of Thunder...............33 percent. .SUNDAY... * Sky/weather.....................Partly sunny. Chance of showers in the morning. slight chance of thunderstorms . slight chance of showers in the afternoon. * Max Temperature.................82-90. * 24 hr trend..................Little change. * Min Humidity....................34-48 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 10 to 20 mph. * Chance of Precip................30 percent. * CWR (>= 0.10 IN)................10 percent west portion...0 percent east portion. * Chance of Thunder...............19 percent. * Mixing Height for Phoenix.......9200 ft AGL. * Transport Wind for Phoenix......Southwest 5 knots. * Dispersion for Phoenix..........Good. .EXTENDED... .MONDAY...Mostly clear. Lows 65-75. Highs 86-94. East winds 5 to 10 mph. .TUESDAY...Mostly clear. Lows 66-76. Highs 87-95. South winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 66-76. Highs 89-96. South winds 5 to 10 mph. .THURSDAY...Clear. Lows 66-76. Highs 92-99. .FRIDAY...Clear. Lows 66-76. Highs 91-99. $$ AZZ131-CAZ231-272300- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 358 AM MST Sat Sep 27 2025 /358 AM PDT Sat Sep 27 2025/ .TODAY... * Sky/weather.....................Partly sunny. Slight chance of showers and thunderstorms in the morning becoming chance of showers and thunderstorms in the afternoon. * Max Temperature.................85-91. * 24 hr trend..................4 degrees cooler. * Min Humidity....................42-51 pct. * 24 hr trend..................21 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 15 mph. * Winds...10000 FT MSL............Light and variable in the morning becoming south 5 to 15 mph in the afternoon. * Chance of Precip................60 percent. * CWR (>= 0.10 IN)................50 percent. * Chance of Thunder...............34 percent. * Mixing Height for Yuma..........10200 ft AGL. * Transport Wind for Yuma.........South 6 knots. * Dispersion for Yuma.............Good. .TONIGHT... * Sky/weather.....................Partly cloudy. Chance of thunderstorms in the evening. chance of showers . slight chance of thunderstorms after midnight. * Min Temperature.................66-72. * 24 hr trend..................3 degrees cooler. * Max Humidity....................81-100 pct. * 24 hr trend..................14 pct wetter. * Winds - 20 foot...Slope/Valley..Northeast 5 to 15 mph. * Winds...10000 FT MSL............Southwest 10 to 15 mph. * Chance of Precip................40 percent. * CWR (>= 0.10 IN)................30 percent. * Chance of Thunder...............34 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. Slight chance of showers and thunderstorms. * Max Temperature.................86-91. * 24 hr trend..................Little change. * Min Humidity....................38-48 pct. * 24 hr trend..................3 pct drier. * Winds - 20 foot...Slope/Valley..East 5 to 10 mph in the morning becoming south in the afternoon. * Winds...10000 FT MSL............Southwest 10 to 15 mph. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............12 percent. * Mixing Height for Yuma..........7800 ft AGL. * Transport Wind for Yuma.........South 4 knots. * Dispersion for Yuma.............Fair. .EXTENDED... .MONDAY...Clear. Lows 67-72. Highs 89-94. Southeast winds 5 to 10 mph. .TUESDAY...Mostly clear. Lows 64-72. Highs 90-95. South winds 5 to 15 mph. .WEDNESDAY...Mostly clear. Lows 64-71. Highs 90-95. Southwest winds 5 to 10 mph. .THURSDAY...Clear. Lows 65-71. Highs 92-97. .FRIDAY...Clear. Lows 64-71. Highs 93-98. $$ AZZ133-272300- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 358 AM MST Sat Sep 27 2025 .TODAY... * Sky/weather.....................Partly sunny. Slight chance of thunderstorms in the morning. chance of showers . chance of thunderstorms in the afternoon. * Max Temperature.................71-84. * 24 hr trend..................7 degrees warmer. * Min Humidity....................38-53 pct. * 24 hr trend..................7 pct drier. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................40 percent. * CWR (>= 0.10 IN)................40 percent. * Chance of Thunder...............30 percent. .TONIGHT... * Sky/weather.....................Partly cloudy. Chance of showers and slight chance of thunderstorms. * Min Temperature.................53-67. * 24 hr trend..................Little change. * Max Humidity....................70-93 pct. * 24 hr trend..................12 pct drier. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................50 percent. * CWR (>= 0.10 IN)................20 percent. * Chance of Thunder...............18 percent. .SUNDAY... * Sky/weather.....................Partly sunny. Chance of showers in the morning. slight chance of thunderstorms . slight chance of showers in the afternoon. * Max Temperature.................72-85. * 24 hr trend..................Little change. * Min Humidity....................33-48 pct. * 24 hr trend..................6 pct drier. * Winds - 20 foot...Slope/Valley..Southeast 5 to 10 mph in the morning becoming southwest in the afternoon. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................30 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............17 percent. .EXTENDED... .MONDAY...Mostly clear. Lows 52-68. Highs 74-89. East winds 5 to 15 mph. .TUESDAY...Mostly clear. Lows 53-68. Highs 76-90. Southeast winds 5 to 15 mph. .WEDNESDAY...Clear. Lows 53-69. Highs 77-92. Northeast winds 5 to 10 mph. .THURSDAY...Clear. Lows 55-70. Highs 81-95. .FRIDAY...Clear. Lows 55-70. Highs 81-95. $$ CAZ232-272300- Imperial County And Eastern Riverside County- 358 AM PDT Sat Sep 27 2025 .TODAY... * Sky/weather.....................Partly sunny. Slight chance of thunderstorms in the morning. chance of showers . chance of thunderstorms in the afternoon. * Max Temperature.................79-90. * 24 hr trend..................4 degrees cooler. * Min Humidity....................35-50 pct. * 24 hr trend..................15 pct wetter. * Winds - 20 foot...Slope/Valley..Northeast 5 to 15 mph. * Winds...10000 FT MSL............South 5 to 15 mph. * Chance of Precip................50 percent. * CWR (>= 0.10 IN)................40 percent. * Chance of Thunder...............31 percent. .TONIGHT... * Sky/weather.....................Partly cloudy. Slight chance of thunderstorms in the evening. slight chance of showers . * Min Temperature.................65-71. * 24 hr trend..................Little change. * Max Humidity....................71-87 pct. * 24 hr trend..................10 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 10 mph in the evening becoming north after midnight. * Winds...10000 FT MSL............Southwest 10 to 15 mph. * Chance of Precip................30 percent. * CWR (>= 0.10 IN)................10 percent. * Chance of Thunder...............22 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. Slight chance of showers . slight chance of thunderstorms in the afternoon. * Max Temperature.................82-91. * 24 hr trend..................Little change. * Min Humidity....................32-45 pct. * 24 hr trend..................4 pct drier. * Winds - 20 foot...Slope/Valley..Northeast 5 to 10 mph in the morning becoming south in the afternoon. * Winds...10000 FT MSL............Light and variable in the morning becoming west 5 to 15 mph in the afternoon. * Chance of Precip................10 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............7 percent. .EXTENDED... .MONDAY...Mostly clear. Lows 67-74. Highs 85-94. Southwest winds 5 to 10 mph. .TUESDAY...Mostly clear. Lows 64-72. Highs 84-94. Southwest winds 5 to 15 mph. .WEDNESDAY...Clear. Lows 64-71. Highs 85-93. West winds 5 to 15 mph. .THURSDAY...Clear. Lows 66-72. Highs 87-96. .FRIDAY...Clear. Lows 67-72. Highs 87-95. $$ CAZ230-272300- Joshua Tree National Park- 358 AM PDT Sat Sep 27 2025 .TODAY... * Sky/weather.....................Partly sunny. Chance of showers in the morning. chance of thunderstorms . showers likely in the afternoon. * Max Temperature.................69-81. * 24 hr trend..................5 degrees cooler. * Min Humidity....................45-56 pct. * 24 hr trend..................18 pct wetter. * Winds - 20 foot...Slope/Valley..Northeast 5 to 10 mph in the morning becoming southeast in the afternoon. * Winds...10000 FT MSL............East 5 to 15 mph in the morning becoming light and variable in the afternoon. * Chance of Precip................60 percent. * CWR (>= 0.10 IN)................60 percent. * Chance of Thunder...............34 percent. .TONIGHT... * Sky/weather.....................Mostly clear. Slight chance of showers and thunderstorms in the evening. * Min Temperature.................54-65. * 24 hr trend..................3 degrees cooler. * Max Humidity....................75-90 pct. * 24 hr trend..................11 pct wetter. * Winds - 20 foot...Slope/Valley..Southwest 5 to 10 mph in the evening becoming mostly downslope/downvalley after midnight. * Winds...10000 FT MSL............North 5 to 15 mph. * Chance of Precip................20 percent in the evening becoming 0 percent after midnight. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............20 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. * Max Temperature.................72-83. * 24 hr trend..................3 degrees warmer. * Min Humidity....................41-51 pct. * 24 hr trend..................5 pct drier. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............Light and variable. * Chance of Precip................0 percent in the morning becoming 20 percent in the afternoon. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............9 percent. .EXTENDED... .MONDAY...Mostly clear. Lows 55-68. Highs 74-86. Southwest winds 5 to 15 mph. .TUESDAY...Mostly clear. Lows 54-67. Highs 73-87. Southwest winds 5 to 15 mph. .WEDNESDAY...Clear. Lows 54-65. Highs 74-87. West winds 5 to 10 mph. .THURSDAY...Clear. Lows 56-66. Highs 76-89. .FRIDAY...Clear. Lows 57-66. Highs 76-88. $$ .8 TO 10 DAY OUTLOOK...Saturday October 4th through Monday October 6th: Above normal temperatures and near median precipitation.