Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Phoenix, AZ
Issued by NWS Phoenix, AZ
278 FNUS55 KPSR 202021 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 121 PM MST Sun Sep 20 2026 .DISCUSSION... Temperatures will remain near the seasonal normal with dry conditions giving way to a chance of thunderstorms over far eastern districts Tuesday. Minimum humidity values will fall into a 15-30% range following fair to good overnight recovery of 30-70%. Winds should retain a typical upslope/drainage component with very limited afternoon gustiness. ...Thunderstorms imply gusty winds... Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-210830- 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- 121 PM MST Sun Sep 20 2026 .TONIGHT... * Sky/weather.....................Partly cloudy in the evening becoming mostly cloudy after midnight. * Min Temperature.................73-83. * 24 hr trend..................3 degrees warmer. * Max Humidity....................40-62 pct. * 24 hr trend..................5 pct wetter. * 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. .MONDAY... * Sky/weather.....................Partly sunny. * Max Temperature.................93-101. * 24 hr trend..................Little change. * Min Humidity....................19-24 pct. * 24 hr trend..................Little RH 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...............1 percent. * Mixing Height for Phoenix.......11000 ft AGL. * Transport Wind for Phoenix......South 11 knots. * Dispersion for Phoenix..........Excellent. .MONDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................70-80. * 24 hr trend..................4 degrees cooler. * Max Humidity....................38-55 pct. * 24 hr trend..................4 pct drier. * Winds - 20 foot...Slope/Valley..Southwest 5 to 10 mph in the evening becoming mostly downslope/downvalley after midnight. * 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.................92-99. * 24 hr trend..................Little change. * Min Humidity....................18-24 pct. * 24 hr trend..................Little change. * Winds - 20 foot...Slope/Valley..East 5 to 10 mph in the morning becoming south 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...............1 percent. * Mixing Height for Phoenix.......7100 ft AGL. * Transport Wind for Phoenix......South 5 knots. * Dispersion for Phoenix..........Fair. .EXTENDED... .WEDNESDAY...Mostly clear. Lows 73-83. Highs 93-100. East winds 5 to 15 mph. .THURSDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 74-84. Highs 93-102. East winds 5 to 15 mph. .FRIDAY...Mostly clear. Lows 75-85. Highs 94-103. East winds 5 to 15 mph. .SATURDAY...Mostly clear. Lows 75-85. Highs 95-102. .SUNDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 74-84. Highs 93-100. $$ AZZ131-CAZ231-210830- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 121 PM MST Sun Sep 20 2026 /121 PM PDT Sun Sep 20 2026/ .TONIGHT... * Sky/weather.....................Partly cloudy in the evening becoming mostly cloudy after midnight. * Min Temperature.................73-78. * 24 hr trend..................8 degrees warmer. * Max Humidity....................45-65 pct. * 24 hr trend..................8 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. .MONDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................96-101. * 24 hr trend..................Little change. * Min Humidity....................19-23 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............1 percent. * Mixing Height for Yuma..........8700 ft AGL. * Transport Wind for Yuma.........Southwest 8 knots. * Dispersion for Yuma.............Good. .MONDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................69-74. * 24 hr trend..................5 degrees cooler. * Max Humidity....................44-55 pct. * 24 hr trend..................5 pct drier. * 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...............0 percent. .TUESDAY... * Sky/weather.....................Sunny. * Max Temperature.................95-100. * 24 hr trend..................Little change. * Min Humidity....................15-19 pct. * 24 hr trend..................4 pct drier. * Winds - 20 foot...Slope/Valley..North 5 to 10 mph in the morning becoming west 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...............0 percent. * Mixing Height for Yuma..........8000 ft AGL. * Transport Wind for Yuma.........South 4 knots. * Dispersion for Yuma.............Marginal. .EXTENDED... .WEDNESDAY...Clear. Lows 72-78. Highs 97-102. Southeast winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 75-80. Highs 99-104. Southeast winds 5 to 10 mph. .FRIDAY...Mostly clear. Lows 75-80. Highs 100-105. Southeast winds 5 to 15 mph. .SATURDAY...Mostly clear. Lows 75-80. Highs 99-104. .SUNDAY...Partly cloudy. Lows 74-80. Highs 97-102. $$ AZZ133-210830- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 121 PM MST Sun Sep 20 2026 .TONIGHT... * Sky/weather.....................Partly cloudy. * Min Temperature.................59-76. * 24 hr trend..................Little change. * Max Humidity....................40-60 pct. * 24 hr trend..................5 pct drier. * Winds - 20 foot...Slope/Valley..North 5 to 10 mph in the evening becoming east after midnight. * Winds...10000 FT MSL............Southwest 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............1 percent. .MONDAY... * Sky/weather.....................Partly sunny. * Max Temperature.................81-96. * 24 hr trend..................Little change. * Min Humidity....................20-29 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............South 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............2 percent. .MONDAY NIGHT... * Sky/weather.....................Partly cloudy. * Min Temperature.................59-74. * 24 hr trend..................Little change. * Max Humidity....................42-62 pct. * 24 hr trend..................3 pct wetter. * Winds - 20 foot...Slope/Valley..East 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...............3 percent. .TUESDAY... * Sky/weather.....................Partly sunny. Slight chance of showers . slight chance of thunderstorms in the afternoon. * Max Temperature.................78-94. * 24 hr trend..................Little change. * Min Humidity....................24-38 pct. * 24 hr trend..................7 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 10 mph in the morning becoming south in the afternoon. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................5 percent. * Chance of Thunder...............20 percent. .EXTENDED... .WEDNESDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 58-75. Highs 76-93. East winds 10 to 20 mph. .THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 58-74. Highs 76-93. East winds 10 to 20 mph. .FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 58-75. Highs 76-93. East winds 10 to 20 mph. .SATURDAY...Partly cloudy. Lows 58-76. Highs 77-94. .SUNDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 59-76. Highs 78-93. $$ CAZ232-210830- Imperial County And Eastern Riverside County- 121 PM PDT Sun Sep 20 2026 .TONIGHT... * Sky/weather.....................Partly cloudy. * Min Temperature.................73-78. * 24 hr trend..................3 degrees warmer. * Max Humidity....................36-62 pct. * 24 hr trend..................9 pct wetter. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 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.................90-100. * 24 hr trend..................Little change. * Min Humidity....................14-22 pct. * 24 hr trend..................3 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 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .MONDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................68-74. * 24 hr trend..................5 degrees cooler. * Max Humidity....................38-57 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..West 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. .TUESDAY... * Sky/weather.....................Sunny. * Max Temperature.................89-98. * 24 hr trend..................Little change. * Min Humidity....................12-21 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph. * 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. .EXTENDED... .WEDNESDAY...Clear. Lows 72-81. Highs 92-102. North winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 74-82. Highs 94-103. Southeast winds 5 to 10 mph. .FRIDAY...Mostly clear. Lows 75-82. Highs 94-104. South winds 5 to 15 mph. .SATURDAY...Mostly clear. Lows 74-81. Highs 94-104. .SUNDAY...Mostly clear. Lows 73-80. Highs 92-102. $$ CAZ230-210830- Joshua Tree National Park- 121 PM PDT Sun Sep 20 2026 .TONIGHT... * Sky/weather.....................Partly cloudy. * Min Temperature.................64-75. * 24 hr trend..................Little change. * Max Humidity....................35-44 pct. * 24 hr trend..................16 pct wetter. * Winds - 20 foot...Slope/Valley..South 5 to 10 mph in the evening becoming mostly downslope/downvalley after midnight. * 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. .MONDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................78-93. * 24 hr trend..................3 degrees cooler. * Min Humidity....................18-28 pct. * 24 hr trend..................10 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 10 mph in the morning becoming south 5 to 15 mph in the afternoon. * Winds...10000 FT MSL............South 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .MONDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................60-71. * 24 hr trend..................4 degrees cooler. * Max Humidity....................43-53 pct. * 24 hr trend..................8 pct wetter. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............South 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....................18-24 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph in the morning becoming east 5 to 10 mph in the afternoon. * 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. .EXTENDED... .WEDNESDAY...Clear. Lows 64-75. Highs 81-94. North winds 5 to 15 mph. .THURSDAY...Clear. Lows 66-76. Highs 82-96. Southwest winds 5 to 15 mph. .FRIDAY...Mostly clear. Lows 65-76. Highs 83-97. Southwest winds 5 to 15 mph. .SATURDAY...Mostly clear. Lows 63-76. Highs 82-96. .SUNDAY...Mostly clear. Lows 62-74. Highs 79-94. $$ .8 TO 10 DAY OUTLOOK...Monday September 28th through Wednesday September 30th: Above normal temperatures and above median precipitation.