Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Phoenix, AZ
Issued by NWS Phoenix, AZ
816 FNUS55 KPSR 181109 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 409 AM MST Mon Aug 18 2025 .DISCUSSION... Above normal temperatures with a slight chance of storms for the high terrain of southcentral AZ is anticipated today and Tuesday. Winds will continue to follow diurnal upslope/downvalley patterns with afternoon gusts in the 15-20 mph range. Relative humidity will bottom out around 10-20% this afternoon before improving to 15-25% beginning Tuesday. Overnight recovery will range from poor across the western districts to fair in the eastern districts. ...Thunderstorms imply gusty winds... Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-182315- 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- 409 AM MST Mon Aug 18 2025 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................101-107. * 24 hr trend..................Little change. * Min Humidity....................11-15 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southwest 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. * Mixing Height for Phoenix.......8100 ft AGL. * Transport Wind for Phoenix......West 8 knots. * Dispersion for Phoenix..........Good. .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................79-89. * 24 hr trend..................3 degrees warmer. * Max Humidity....................24-39 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southwest 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...............0 percent. .TUESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................103-109. * 24 hr trend..................Little change. * Min Humidity....................14-18 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 5 to 10 mph in the morning becoming west in the afternoon. * Winds...10000 FT MSL............East 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. * Mixing Height for Phoenix.......7100 ft AGL. * Transport Wind for Phoenix......West 7 knots. * Dispersion for Phoenix..........Good. .EXTENDED... .WEDNESDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 82-92. Highs 106-111. South winds 5 to 10 mph. .THURSDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 83-93. Highs 107-113. South winds 5 to 10 mph. .FRIDAY...Partly cloudy with chance of showers and thunderstorms. Lows 83-93. Highs 106-112. Southwest winds 5 to 15 mph. .SATURDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 82-92. Highs 103-109. .SUNDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 80-90. Highs 103-109. $$ AZZ131-CAZ231-182315- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 409 AM MST Mon Aug 18 2025 /409 AM PDT Mon Aug 18 2025/ .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................103-108. * 24 hr trend..................Little change. * Min Humidity....................11-15 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................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. * Mixing Height for Yuma..........7700 ft AGL. * Transport Wind for Yuma.........South 7 knots. * Dispersion for Yuma.............Good. .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................77-82. * 24 hr trend..................5 degrees warmer. * Max Humidity....................30-53 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 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. .TUESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................105-110. * 24 hr trend..................Little change. * Min Humidity....................15-19 pct. * 24 hr trend..................4 pct wetter. * Winds - 20 foot...Slope/Valley..South 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. * Mixing Height for Yuma..........7100 ft AGL. * Transport Wind for Yuma.........South 8 knots. * Dispersion for Yuma.............Good. .EXTENDED... .WEDNESDAY...Mostly clear. Lows 80-88. Highs 108-113. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 83-89. Highs 109-114. South winds 5 to 15 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 84-89. Highs 109-114. South winds 5 to 15 mph. .SATURDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 83-88. Highs 104-109. .SUNDAY...Partly cloudy with chance of showers and thunderstorms. Lows 82-87. Highs 105-110. $$ AZZ133-182315- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 409 AM MST Mon Aug 18 2025 .TODAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................90-103. * 24 hr trend..................Little change. * Min Humidity....................12-17 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..West 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...............3 percent. .TONIGHT... * Sky/weather.....................Partly cloudy. Slight chance of showers and thunderstorms in the evening. * Min Temperature.................65-81. * 24 hr trend..................Little change. * Max Humidity....................31-58 pct. * 24 hr trend..................11 pct wetter. * Winds - 20 foot...Slope/Valley..West 5 to 10 mph in the evening becoming southeast after midnight. * Winds...10000 FT MSL............North 5 to 15 mph. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............2 percent. .TUESDAY... * Sky/weather.....................Partly sunny. Chance of showers and thunderstorms in the afternoon. * Max Temperature.................91-105. * 24 hr trend..................Little change. * Min Humidity....................14-25 pct. * 24 hr trend..................5 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 10 mph in the morning becoming southwest in the afternoon. * Winds...10000 FT MSL............Northeast 5 to 15 mph in the morning becoming light and variable in the afternoon. * Chance of Precip................0 percent in the morning becoming 30 percent in the afternoon. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............25 percent. .EXTENDED... .WEDNESDAY...Partly cloudy with chance of showers and thunderstorms. Lows 66-84. Highs 91-107. East winds 5 to 15 mph. .THURSDAY...Partly cloudy with chance of showers and thunderstorms. Lows 66-84. Highs 92-108. East winds 5 to 15 mph. .FRIDAY...Partly cloudy with chance of showers and thunderstorms. Lows 65-84. Highs 92-107. Northeast winds 5 to 15 mph. .SATURDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 65-83. Highs 90-104. .SUNDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 64-83. Highs 89-104. $$ CAZ232-182315- Imperial County And Eastern Riverside County- 409 AM PDT Mon Aug 18 2025 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................98-108. * 24 hr trend..................3 degrees warmer. * Min Humidity....................10-15 pct. * 24 hr trend..................Little 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...............0 percent. .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................78-84. * 24 hr trend..................4 degrees warmer. * Max Humidity....................22-51 pct. * 24 hr trend..................4 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...............0 percent. .TUESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................100-109. * 24 hr trend..................Little change. * Min Humidity....................12-18 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 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...Mostly clear. Lows 81-90. Highs 103-112. Southwest winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 84-91. Highs 104-114. South winds 5 to 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 84-91. Highs 105-114. South winds 5 to 15 mph. .SATURDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 82-90. Highs 100-109. .SUNDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 81-89. Highs 101-110. $$ CAZ230-182315- Joshua Tree National Park- 409 AM PDT Mon Aug 18 2025 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................88-102. * 24 hr trend..................3 degrees warmer. * Min Humidity....................11-15 pct. * 24 hr trend..................Little change. * 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. .TONIGHT... * Sky/weather.....................Clear. * Min Temperature.................69-79. * 24 hr trend..................4 degrees warmer. * Max Humidity....................24-30 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................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .TUESDAY... * Sky/weather.....................Sunny. * Max Temperature.................90-104. * 24 hr trend..................Little change. * Min Humidity....................14-18 pct. * 24 hr trend..................3 pct wetter. * Winds - 20 foot...Slope/Valley..Northwest 5 to 10 mph in the morning becoming south 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. .EXTENDED... .WEDNESDAY...Mostly clear. Lows 72-84. Highs 93-106. West winds 5 to 15 mph. .THURSDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 75-86. Highs 95-108. Southwest winds 5 to 15 mph. .FRIDAY...Partly cloudy with chance of showers and thunderstorms. Lows 75-86. Highs 95-109. Southwest winds 5 to 15 mph. .SATURDAY...Partly cloudy with chance of showers and thunderstorms. Lows 74-86. Highs 89-104. .SUNDAY...Partly cloudy with chance of showers and thunderstorms. Lows 72-85. Highs 91-104. $$ .8 TO 10 DAY OUTLOOK...Monday August 25th through Wednesday August 27th: Above normal temperatures and above median precipitation.