Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Phoenix, AZ
Issued by NWS Phoenix, AZ
505 FNUS55 KPSR 122031 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 131 PM MST Sat Sep 12 2026 .DISCUSSION... With temperatures hovering near the seasonal normal, thunderstorm chances will be concentrated over higher terrain features in eastern districts with the threat diminishing into lower elevations. Nevertheless, isolated instances of wetting rainfall are possible through Monday. Otherwise, minimum humidity levels will only fall into a 20-30% range in western districts and 25-35% in eastern districts. This will follow fair to good overnight recovery of 40-70%. Outside of thunderstorms, winds will generally remain light with a southwest heading through nearly calm conditions will be common in the morning hours. ...Thunderstorms imply gusty winds... Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-130845- 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- 131 PM MST Sat Sep 12 2026 .TONIGHT... * Sky/weather.....................Mostly clear. Slight chance of showers and thunderstorms after midnight. * Min Temperature.................78-88. * 24 hr trend..................Little change. * Max Humidity....................53-67 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................10 percent. * CWR (>= 0.10 IN)................2 percent. * Chance of Thunder...............8 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................97-104. * 24 hr trend..................Little change. * Min Humidity....................27-32 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................5 percent. * CWR (>= 0.10 IN)................2 percent. * Chance of Thunder...............5 percent. * Mixing Height for Phoenix.......8600 ft AGL. * Transport Wind for Phoenix......Southwest 6 knots. * Dispersion for Phoenix..........Good. .SUNDAY NIGHT... * Sky/weather.....................Mostly clear. Slight chance of showers and thunderstorms after midnight. * Min Temperature.................78-88. * 24 hr trend..................Little change. * Max Humidity....................51-62 pct. * 24 hr trend..................3 pct drier. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................15 percent. * CWR (>= 0.10 IN)................5 percent. * Chance of Thunder...............10 percent. .MONDAY... * Sky/weather.....................Mostly sunny. Slight chance of showers and thunderstorms in the morning. * Max Temperature.................98-105. * 24 hr trend..................Little change. * Min Humidity....................24-30 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................10 percent. * CWR (>= 0.10 IN)................2 percent. * Chance of Thunder...............5 percent. * Mixing Height for Phoenix.......9700 ft AGL. * Transport Wind for Phoenix......Southwest 9 knots. * Dispersion for Phoenix..........Very good. .EXTENDED... .TUESDAY...Mostly clear. Lows 74-84. Highs 96-104. South winds 10 to 20 mph. .WEDNESDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 74-84. Highs 96-103. South winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 76-86. Highs 98-105. Southeast winds 5 to 10 mph. .FRIDAY...Mostly clear. Lows 77-87. Highs 100-107. .SATURDAY...Mostly clear. Lows 78-88. Highs 101-108. $$ AZZ131-CAZ231-130845- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 131 PM MST Sat Sep 12 2026 /131 PM PDT Sat Sep 12 2026/ .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................79-84. * 24 hr trend..................Little change. * Max Humidity....................51-70 pct. * 24 hr trend..................7 pct drier. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 5 to 15 mph in the evening becoming 15 to 25 mph after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............2 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................101-106. * 24 hr trend..................Little change. * Min Humidity....................29-34 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...............2 percent. * Mixing Height for Yuma..........7100 ft AGL. * Transport Wind for Yuma.........South 11 knots. * Dispersion for Yuma.............Very good. .SUNDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................79-84. * 24 hr trend..................Little change. * Max Humidity....................49-67 pct. * 24 hr trend..................3 pct drier. * 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...............2 percent. .MONDAY... * Sky/weather.....................Sunny. * Max Temperature.................101-106. * 24 hr trend..................Little change. * Min Humidity....................24-28 pct. * 24 hr trend..................5 pct drier. * 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...............1 percent. * Mixing Height for Yuma..........6600 ft AGL. * Transport Wind for Yuma.........South 13 knots. * Dispersion for Yuma.............Very good. .EXTENDED... .TUESDAY...Clear. Lows 75-82. Highs 100-105. South winds 10 to 20 mph. .WEDNESDAY...Mostly clear. Lows 75-80. Highs 100-105. South winds 10 to 20 mph. .THURSDAY...Mostly clear. Lows 75-82. Highs 101-106. South winds 5 to 10 mph. .FRIDAY...Mostly clear. Lows 77-84. Highs 104-109. .SATURDAY...Mostly clear. Lows 78-84. Highs 104-109. $$ AZZ133-130845- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 131 PM MST Sat Sep 12 2026 .TONIGHT... * Sky/weather.....................Mostly clear. Slight chance of showers and thunderstorms in the evening. * Min Temperature.................63-79. * 24 hr trend..................Little change. * Max Humidity....................62-84 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..West 5 to 10 mph in the evening becoming mostly downslope/downvalley after midnight. * Winds...10000 FT MSL............Light and variable in the evening becoming south 5 to 15 mph after midnight. * Chance of Precip................10 percent. * CWR (>= 0.10 IN)................5 percent. * Chance of Thunder...............8 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. * Max Temperature.................85-98. * 24 hr trend..................Little change. * Min Humidity....................29-40 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 in the morning becoming 20 percent in the afternoon. * CWR (>= 0.10 IN)................5 percent. * Chance of Thunder...............15 percent. .SUNDAY NIGHT... * Sky/weather.....................Partly cloudy. Chance of showers and thunderstorms . * Min Temperature.................64-80. * 24 hr trend..................Little change. * Max Humidity....................58-84 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 5 to 10 mph in the evening becoming mostly downslope/downvalley after midnight. * Winds...10000 FT MSL............Southwest 10 to 20 mph. * Chance of Precip................30 percent. * CWR (>= 0.10 IN)................15 percent. * Chance of Thunder...............20 percent. .MONDAY... * Sky/weather.....................Partly sunny. Slight chance of showers and thunderstorms in the morning becoming chance of showers and thunderstorms in the afternoon. * Max Temperature.................82-97. * 24 hr trend..................Little change. * Min Humidity....................30-44 pct. * 24 hr trend..................Little RH change. * 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............Southwest 15 to 25 mph. * Chance of Precip................30 percent. * CWR (>= 0.10 IN)................10 percent. * Chance of Thunder...............30 percent. .EXTENDED... .TUESDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 61-78. Highs 80-95. Southeast winds 5 to 15 mph. .WEDNESDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 60-77. Highs 80-95. Southeast winds 5 to 10 mph. .THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 60-78. Highs 81-97. East winds 5 to 15 mph. .FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 60-79. Highs 83-100. .SATURDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 60-79. Highs 83-101. $$ CAZ232-130845- Imperial County And Eastern Riverside County- 131 PM PDT Sat Sep 12 2026 .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................78-85. * 24 hr trend..................Little change. * Max Humidity....................45-74 pct. * 24 hr trend..................14 pct drier. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............1 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................96-107. * 24 hr trend..................Little change. * Min Humidity....................16-30 pct. * 24 hr trend..................9 pct drier. * 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...............1 percent. .SUNDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................76-83. * 24 hr trend..................Little change. * Max Humidity....................27-57 pct. * 24 hr trend..................17 pct drier. * 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. .MONDAY... * Sky/weather.....................Sunny. * Max Temperature.................96-106. * 24 hr trend..................Little change. * Min Humidity....................11-23 pct. * 24 hr trend..................6 pct drier. * 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...Clear. Lows 72-80. Highs 95-105. South winds 5 to 15 mph. .WEDNESDAY...Clear. Lows 72-80. Highs 95-104. South winds 5 to 15 mph. .THURSDAY...Clear. Lows 73-82. Highs 96-105. South winds 5 to 10 mph. .FRIDAY...Clear. Lows 76-84. Highs 98-108. .SATURDAY...Mostly clear. Lows 78-84. Highs 99-109. $$ CAZ230-130845- Joshua Tree National Park- 131 PM PDT Sat Sep 12 2026 .TONIGHT... * Sky/weather.....................Clear. * Min Temperature.................68-81. * 24 hr trend..................Little change. * Max Humidity....................46-62 pct. * 24 hr trend..................8 pct drier. * 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...............1 percent. .SUNDAY... * Sky/weather.....................Sunny. * Max Temperature.................86-99. * 24 hr trend..................Little change. * Min Humidity....................19-26 pct. * 24 hr trend..................7 pct drier. * 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...............1 percent. .SUNDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................66-77. * 24 hr trend..................3 degrees cooler. * Max Humidity....................33-41 pct. * 24 hr trend..................17 pct drier. * Winds - 20 foot...Slope/Valley..West 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. .MONDAY... * Sky/weather.....................Sunny. * Max Temperature.................85-99. * 24 hr trend..................Little change. * Min Humidity....................13-18 pct. * 24 hr trend..................7 pct drier. * Winds - 20 foot...Slope/Valley..West 5 to 10 mph in the morning becoming south in the afternoon. * 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. .EXTENDED... .TUESDAY...Clear. Lows 63-76. Highs 82-97. Southwest winds 10 to 20 mph. Minimum relative humidity may be lower than 15 percent. .WEDNESDAY...Clear. Lows 63-74. Highs 83-97. Southwest winds 5 to 15 mph. .THURSDAY...Clear. Lows 64-76. Highs 85-99. Southwest winds 5 to 15 mph. .FRIDAY...Clear. Lows 67-78. Highs 88-101. .SATURDAY...Clear. Lows 68-79. Highs 89-102. $$ .8 TO 10 DAY OUTLOOK...Sunday September 20th through Tuesday September 22nd: Above normal temperatures and above median precipitation.