Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Phoenix, AZ
Issued by NWS Phoenix, AZ
418 FNUS55 KPSR 212022 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 122 PM MST Mon Sep 21 2026 .DISCUSSION... Temperatures will remain near normal with shower and thunderstorm chances increasing over eastern districts. Gusty outflow winds will be the greatest impact for ongoing incidents or prescribed burns with chances for wetting rainfall under 20%. Minimum humidity values will fall into a 15-30% range following fair to good overnight recovery of 30-70%. Winds across eastern districts will begin to maintain a southeast direction with increasing speeds the next couple days, even through the overnight. Winds in western districts will remain light, and nearly calm in many instances. ...Thunderstorms imply gusty winds... Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-220830- 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- 122 PM MST Mon Sep 21 2026 .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................69-79. * 24 hr trend..................4 degrees cooler. * Max Humidity....................41-59 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 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. .TUESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................93-100. * 24 hr trend..................Little change. * Min Humidity....................19-25 pct. * 24 hr trend..................Little change. * Winds - 20 foot...Slope/Valley..Southeast 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...............5 percent. * Mixing Height for Phoenix.......8700 ft AGL. * Transport Wind for Phoenix......Southeast 10 knots. * Dispersion for Phoenix..........Very good. .TUESDAY NIGHT... * Sky/weather.....................Partly cloudy. * Min Temperature.................72-82. * 24 hr trend..................3 degrees warmer. * Max Humidity....................43-60 pct. * 24 hr trend..................4 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............Southeast 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............5 percent. .WEDNESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................93-100. * 24 hr trend..................Little change. * Min Humidity....................24-32 pct. * 24 hr trend..................6 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 15 mph. * Winds...10000 FT MSL............Southeast 5 to 15 mph in the morning becoming light and variable in the afternoon. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............5 percent. * Mixing Height for Phoenix.......8000 ft AGL. * Transport Wind for Phoenix......East 4 knots. * Dispersion for Phoenix..........Fair. .EXTENDED... .THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 73-83. Highs 92-99. East winds 5 to 10 mph. .FRIDAY...Mostly clear. Lows 73-83. Highs 93-102. East winds 5 to 15 mph. .SATURDAY...Mostly clear. Lows 75-85. Highs 95-103. Southeast winds 5 to 10 mph. .SUNDAY...Partly cloudy. Lows 73-83. Highs 93-101. .MONDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 71-81. Highs 92-99. $$ AZZ131-CAZ231-220830- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 122 PM MST Mon Sep 21 2026 /122 PM PDT Mon Sep 21 2026/ .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................68-73. * 24 hr trend..................7 degrees cooler. * Max Humidity....................49-61 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southwest 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...............1 percent. .TUESDAY... * Sky/weather.....................Sunny. * Max Temperature.................95-100. * 24 hr trend..................Little change. * Min Humidity....................16-20 pct. * 24 hr trend..................4 pct drier. * Winds - 20 foot...Slope/Valley..Northwest 5 to 10 mph in the morning becoming southwest in the afternoon. * 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. * Mixing Height for Yuma..........7600 ft AGL. * Transport Wind for Yuma.........South 4 knots. * Dispersion for Yuma.............Marginal. .TUESDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................70-75. * 24 hr trend..................Little change. * Max Humidity....................37-51 pct. * 24 hr trend..................12 pct drier. * Winds - 20 foot...Slope/Valley..West 5 to 10 mph in the evening becoming northeast after midnight. * Winds...10000 FT MSL............Southeast 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .WEDNESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................97-102. * 24 hr trend..................Little change. * Min Humidity....................20-25 pct. * 24 hr trend..................5 pct wetter. * Winds - 20 foot...Slope/Valley..Northeast 5 to 10 mph in the morning becoming southeast in the afternoon. * Winds...10000 FT MSL............Southeast 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. * Mixing Height for Yuma..........9700 ft AGL. * Transport Wind for Yuma.........Southeast 7 knots. * Dispersion for Yuma.............Good. .EXTENDED... .THURSDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 74-79. Highs 97-102. Southeast winds 5 to 10 mph. .FRIDAY...Mostly clear. Lows 75-80. Highs 99-104. Southeast winds 5 to 10 mph. .SATURDAY...Mostly clear. Lows 75-80. Highs 100-105. South winds 5 to 15 mph. .SUNDAY...Mostly clear. Lows 74-80. Highs 98-103. .MONDAY...Mostly clear. Lows 71-78. Highs 96-101. $$ AZZ133-220830- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 122 PM MST Mon Sep 21 2026 .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................59-75. * 24 hr trend..................Little change. * Max Humidity....................44-67 pct. * 24 hr trend..................Little RH change. * 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...............5 percent. .TUESDAY... * Sky/weather.....................Partly sunny. Slight chance of showers . slight chance of thunderstorms in the afternoon. * Max Temperature.................79-95. * 24 hr trend..................Little change. * Min Humidity....................23-39 pct. * 24 hr trend..................5 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................10 percent. * Chance of Thunder...............20 percent. .TUESDAY NIGHT... * Sky/weather.....................Mostly cloudy. Slight chance of showers and thunderstorms in the evening. chance of showers after midnight. * Min Temperature.................59-76. * 24 hr trend..................Little change. * Max Humidity....................55-84 pct. * 24 hr trend..................15 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 15 mph. * Winds...10000 FT MSL............East 10 to 15 mph. * Chance of Precip................30 percent. * CWR (>= 0.10 IN)................10 percent. * Chance of Thunder...............10 percent. .WEDNESDAY... * Sky/weather.....................Partly sunny. Slight chance of showers in the morning becoming chance of showers and slight chance of thunderstorms in the afternoon. * Max Temperature.................74-92. * 24 hr trend..................4 degrees cooler. * Min Humidity....................32-55 pct. * 24 hr trend..................12 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 15 mph. * Winds...10000 FT MSL............East 5 to 15 mph in the morning becoming light and variable in the afternoon. * Chance of Precip................30 percent. * CWR (>= 0.10 IN)................15 percent. * Chance of Thunder...............25 percent. .EXTENDED... .THURSDAY...Partly cloudy with chance of showers and thunderstorms. Lows 57-74. Highs 76-93. East winds 10 to 20 mph. .FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 57-75. Highs 77-93. East winds 10 to 20 mph. .SATURDAY...Mostly clear. Lows 58-76. Highs 78-95. East winds 5 to 15 mph. .SUNDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 59-76. Highs 77-93. .MONDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 57-75. Highs 76-92. $$ CAZ232-220830- Imperial County And Eastern Riverside County- 122 PM PDT Mon Sep 21 2026 .TONIGHT... * Sky/weather.....................Clear. * Min Temperature.................67-73. * 24 hr trend..................7 degrees cooler. * Max Humidity....................42-61 pct. * 24 hr trend..................Little RH change. * 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. .TUESDAY... * Sky/weather.....................Sunny. * Max Temperature.................89-99. * 24 hr trend..................Little change. * Min Humidity....................12-21 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Northwest 5 to 10 mph in the morning becoming southwest in the afternoon. * Winds...10000 FT MSL............South 15 to 25 mph in the morning becoming 5 to 15 mph in the afternoon. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .TUESDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................71-78. * 24 hr trend..................4 degrees warmer. * Max Humidity....................29-46 pct. * 24 hr trend..................14 pct drier. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph. * Winds...10000 FT MSL............Southeast 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .WEDNESDAY... * Sky/weather.....................Sunny. * Max Temperature.................92-102. * 24 hr trend..................3 degrees warmer. * Min Humidity....................18-25 pct. * 24 hr trend..................5 pct wetter. * Winds - 20 foot...Slope/Valley..Northeast 5 to 10 mph in the morning becoming southeast in the afternoon. * Winds...10000 FT MSL............Southeast 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .EXTENDED... .THURSDAY...Mostly clear. Lows 75-82. Highs 92-102. South winds 5 to 10 mph. .FRIDAY...Mostly clear. Lows 75-82. Highs 93-104. South winds 5 to 10 mph. .SATURDAY...Mostly clear. Lows 75-82. Highs 94-105. South winds 5 to 15 mph. .SUNDAY...Mostly clear. Lows 72-81. Highs 92-103. .MONDAY...Mostly clear. Lows 71-78. Highs 90-100. $$ CAZ230-220830- Joshua Tree National Park- 122 PM PDT Mon Sep 21 2026 .TONIGHT... * Sky/weather.....................Clear. * Min Temperature.................58-69. * 24 hr trend..................7 degrees cooler. * Max Humidity....................44-55 pct. * 24 hr trend..................11 pct wetter. * 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. .TUESDAY... * Sky/weather.....................Sunny. * Max Temperature.................78-91. * 24 hr trend..................Little change. * Min Humidity....................18-25 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..North 5 to 15 mph. * Winds...10000 FT MSL............South 5 to 15 mph in the morning becoming light and variable in the afternoon. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .TUESDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................64-71. * 24 hr trend..................4 degrees warmer. * Max Humidity....................35-41 pct. * 24 hr trend..................11 pct drier. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph. * Winds...10000 FT MSL............Light and variable in the evening becoming southeast 5 to 15 mph after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .WEDNESDAY... * Sky/weather.....................Sunny. * Max Temperature.................81-94. * 24 hr trend..................3 degrees warmer. * Min Humidity....................21-27 pct. * 24 hr trend..................3 pct wetter. * Winds - 20 foot...Slope/Valley..North 5 to 10 mph in the morning becoming southeast in the afternoon. * Winds...10000 FT MSL............Southeast 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .EXTENDED... .THURSDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 66-77. Highs 81-94. Southwest winds 5 to 15 mph. .FRIDAY...Mostly clear. Lows 66-77. Highs 82-95. Southwest winds 5 to 15 mph. .SATURDAY...Mostly clear. Lows 64-77. Highs 82-96. Southwest winds 5 to 15 mph. .SUNDAY...Mostly clear. Lows 61-76. Highs 80-95. .MONDAY...Mostly clear. Lows 61-72. Highs 78-92. $$ .8 TO 10 DAY OUTLOOK...Tuesday September 29th through Thursday October 1st: Above normal temperatures and above median precipitation.