Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Phoenix, AZ
Issued by NWS Phoenix, AZ
090 FNUS55 KPSR 231039 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 339 AM MST Sat Aug 23 2025 .DISCUSSION... Temperatures will remain around 4-7 degrees above normal through the weekend. Daily thunderstorm chances will continue through the weekend with monsoonal activity expected to expand to include the western districts. Best chances for storms this weekend will be across the western districts. Lightning, locally heavy rainfall, and gusty erratic outflow winds will be the primary threats with thunderstorms. Chances for seeing outflows in excess of 35 mph for tonight are less than 50%, with the highest probabilities across SW AZ. Probabilities increase tomorrow, with the HREF showing a 50-70% chance of winds in excess of 35 mph and a 10% chance of winds in excess of 58 mph, with the highest probabilities once again across SW AZ. MinRHs will be around 15-25% through the weekend, while Max RHs will be around 40-50% for most areas. ...Thunderstorms imply gusty winds... Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-232245- 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- 339 AM MST Sat Aug 23 2025 .TODAY... * Sky/weather.....................Mostly sunny. Slight chance of showers and thunderstorms. * Max Temperature.................104-110. * 24 hr trend..................Little change. * Min Humidity....................19-24 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............Light and variable. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............21 percent. * Mixing Height for Phoenix.......11900 ft AGL. * Transport Wind for Phoenix......West 5 knots. * Dispersion for Phoenix..........Good. .TONIGHT... * Sky/weather.....................Partly cloudy. Slight chance of showers and thunderstorms . * Min Temperature.................82-92. * 24 hr trend..................Little change. * Max Humidity....................42-51 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph in the evening becoming south 5 to 10 mph after midnight. * Winds...10000 FT MSL............West 5 to 15 mph. * Chance of Precip................30 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............28 percent. .SUNDAY... * Sky/weather.....................Partly sunny. Slight chance of showers and thunderstorms. * Max Temperature.................104-110. * 24 hr trend..................Little change. * Min Humidity....................17-22 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..East 5 to 10 mph in the morning becoming southwest in the afternoon. * Winds...10000 FT MSL............Southeast 5 to 15 mph. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............19 percent. * Mixing Height for Phoenix.......12800 ft AGL. * Transport Wind for Phoenix......West 5 knots. * Dispersion for Phoenix..........Marginal. .EXTENDED... .MONDAY...Partly cloudy with chance of showers and thunderstorms. Lows 79-89. Highs 101-108. Southwest winds 5 to 15 mph. .TUESDAY...Mostly cloudy with chance of showers and thunderstorms. Lows 76-86. Highs 94-100. South winds 5 to 15 mph. .WEDNESDAY...Partly cloudy with chance of showers and thunderstorms. Lows 76-86. Highs 92-100. South winds 5 to 10 mph. .THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 76-86. Highs 95-102. .FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 76-86. Highs 97-103. $$ AZZ131-CAZ231-232245- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 339 AM MST Sat Aug 23 2025 /339 AM PDT Sat Aug 23 2025/ .TODAY... * Sky/weather.....................Mostly sunny. Slight chance of showers and thunderstorms. * Max Temperature.................107-112. * 24 hr trend..................Little change. * Min Humidity....................20-25 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............Southeast 10 to 15 mph. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............17 percent. * Mixing Height for Yuma..........7600 ft AGL. * Transport Wind for Yuma.........South 10 knots. * Dispersion for Yuma.............Very good. .TONIGHT... * Sky/weather.....................Partly cloudy. Slight chance of showers and thunderstorms . * Min Temperature.................83-88. * 24 hr trend..................Little change. * Max Humidity....................45-60 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............Light and variable in the evening becoming south 5 to 15 mph after midnight. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............22 percent. .SUNDAY... * Sky/weather.....................Partly sunny. Slight chance of showers and thunderstorms. * Max Temperature.................107-112. * 24 hr trend..................Little change. * Min Humidity....................17-22 pct. * 24 hr trend..................3 pct drier. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 15 mph. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............20 percent. * Mixing Height for Yuma..........13600 ft AGL. * Transport Wind for Yuma.........South 8 knots. * Dispersion for Yuma.............Very good. .EXTENDED... .MONDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 80-87. Highs 102-107. South winds 5 to 15 mph. .TUESDAY...Mostly cloudy with chance of showers and thunderstorms. Lows 76-85. Highs 97-102. South winds 5 to 15 mph. .WEDNESDAY...Partly cloudy with chance of showers and thunderstorms. Lows 76-82. Highs 97-102. South winds 5 to 15 mph. .THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 76-81. Highs 99-104. .FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 76-81. Highs 100-105. $$ AZZ133-232245- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 339 AM MST Sat Aug 23 2025 .TODAY... * Sky/weather.....................Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. * Max Temperature.................91-105. * 24 hr trend..................Little change. * Min Humidity....................17-26 pct. * 24 hr trend..................Little 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............Southeast 5 to 15 mph. * Chance of Precip................0 percent in the morning becoming 30 percent in the afternoon. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............30 percent. .TONIGHT... * Sky/weather.....................Partly cloudy. Slight chance of showers and thunderstorms . * Min Temperature.................67-83. * 24 hr trend..................Little change. * Max Humidity....................41-54 pct. * 24 hr trend..................3 pct drier. * Winds - 20 foot...Slope/Valley..North 5 to 15 mph in the evening becoming northeast 5 to 10 mph after midnight. * Winds...10000 FT MSL............Southwest 5 to 15 mph in the evening becoming light and variable after midnight. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................10 percent. * Chance of Thunder...............24 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................90-105. * 24 hr trend..................Little change. * Min Humidity....................15-22 pct. * 24 hr trend..................3 pct drier. * Winds - 20 foot...Slope/Valley..East 5 to 15 mph in the morning becoming south 5 to 10 mph in the afternoon. * Winds...10000 FT MSL............South 5 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .EXTENDED... .MONDAY...Partly cloudy with chance of showers and thunderstorms. Lows 64-83. Highs 89-104. South winds 5 to 15 mph. .TUESDAY...Partly cloudy with chance of showers and thunderstorms. Lows 62-80. Highs 85-98. Southwest winds 5 to 15 mph. .WEDNESDAY...Partly cloudy with chance of showers and thunderstorms. Lows 61-76. Highs 78-92. South winds 5 to 15 mph. .THURSDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 60-76. Highs 81-95. .FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 60-77. Highs 84-98. $$ CAZ232-232245- Imperial County And Eastern Riverside County- 339 AM PDT Sat Aug 23 2025 .TODAY... * Sky/weather.....................Partly sunny. Slight chance of showers and thunderstorms. * Max Temperature.................102-112. * 24 hr trend..................Little change. * Min Humidity....................17-24 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................20 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............18 percent. .TONIGHT... * Sky/weather.....................Mostly clear. Slight chance of showers and thunderstorms. * Min Temperature.................84-90. * 24 hr trend..................Little change. * Max Humidity....................37-63 pct. * 24 hr trend..................3 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 light and variable after midnight. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............15 percent. .SUNDAY... * Sky/weather.....................Partly sunny. Slight chance of showers and thunderstorms . * Max Temperature.................102-112. * 24 hr trend..................Little change. * Min Humidity....................15-23 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 15 mph. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............21 percent. .EXTENDED... .MONDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 80-90. Highs 99-109. South winds 5 to 15 mph. .TUESDAY...Partly cloudy with chance of showers and thunderstorms. Lows 77-86. Highs 93-103. South winds 5 to 15 mph. .WEDNESDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 77-83. Highs 93-102. South winds 5 to 10 mph. .THURSDAY...Partly cloudy. Lows 76-82. Highs 95-104. .FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 76-83. Highs 95-104. $$ CAZ230-232245- Joshua Tree National Park- 339 AM PDT Sat Aug 23 2025 .TODAY... * Sky/weather.....................Partly sunny. Chance of showers and thunderstorms . * Max Temperature.................92-106. * 24 hr trend..................Little change. * Min Humidity....................18-26 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 15 mph. * Chance of Precip................40 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............35 percent. .TONIGHT... * Sky/weather.....................Mostly clear. Slight chance of showers and thunderstorms . * Min Temperature.................74-85. * 24 hr trend..................Little change. * Max Humidity....................35-43 pct. * 24 hr trend..................Little change. * Winds - 20 foot...Slope/Valley..West 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................20 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............19 percent. .SUNDAY... * Sky/weather.....................Partly sunny. Slight chance of showers and thunderstorms in the morning becoming chance of showers and thunderstorms in the afternoon. * Max Temperature.................91-106. * 24 hr trend..................Little change. * Min Humidity....................16-23 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................40 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............41 percent. .EXTENDED... .MONDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 70-85. Highs 90-103. Southwest winds 5 to 15 mph. .TUESDAY...Showers and thunderstorms likely. Lows 66-82. Highs 84-96. South winds 5 to 15 mph. .WEDNESDAY...Partly cloudy with chance of showers and thunderstorms. Lows 66-78. Highs 83-96. South winds 5 to 10 mph. .THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 66-77. Highs 85-97. .FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 66-77. Highs 85-98. $$ .8 TO 10 DAY OUTLOOK...Saturday August 30th through Monday September 1st: Below normal temperatures and near median precipitation.