Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Phoenix, AZ
Issued by NWS Phoenix, AZ
132 FNUS55 KPSR 181852 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 1152 AM MST Fri Sep 18 2026 .DISCUSSION... Overall there are no fire weather concerns through the next week. A drying trend will continue today through this weekend with no rain expected. Minimum RH values this afternoon will be around 20-35% across south-central AZ to 10-20% across southeast CA and southwest AZ. The minimum RHs will then dip to 10-20% for nearly all areas this weekend. Overnight recoveries across south-central AZ will still be good tonight at 45-75%, but then fall lower this weekend. Winds will mostly follow typical diurnal patterns with modest afternoon upslope/upvalley gustiness (15-25 mph). ...Thunderstorms imply gusty winds... Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-190700- 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- 1152 AM MST Fri Sep 18 2026 .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................72-82. * 24 hr trend..................Little change. * Max Humidity....................25-51 pct. * 24 hr trend..................31 pct drier. * Winds - 20 foot...Slope/Valley..West 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................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .SATURDAY... * Sky/weather.....................Sunny. * Max Temperature.................96-102. * 24 hr trend..................Little change. * Min Humidity....................11-18 pct. * 24 hr trend..................6 pct drier. * Winds - 20 foot...Slope/Valley..Light and variable in the morning becoming southwest 5 to 10 mph 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. * Mixing Height for Phoenix.......10500 ft AGL. * Transport Wind for Phoenix......Southwest 6 knots. * Dispersion for Phoenix..........Good. .SATURDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................71-81. * 24 hr trend..................Little change. * Max Humidity....................23-49 pct. * 24 hr trend..................4 pct drier. * Winds - 20 foot...Slope/Valley..Light and variable in the evening becoming east 5 to 10 mph after midnight. * 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. .SUNDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................95-102. * 24 hr trend..................Little change. * Min Humidity....................13-20 pct. * 24 hr trend..................3 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 10 mph in the morning becoming south 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. * Mixing Height for Phoenix.......11900 ft AGL. * Transport Wind for Phoenix......Southwest 5 knots. * Dispersion for Phoenix..........Good. .EXTENDED... .MONDAY...Partly cloudy. Lows 71-81. Highs 93-101. South winds 5 to 15 mph. .TUESDAY...Mostly clear. Lows 71-81. Highs 94-101. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 73-83. Highs 97-104. East winds 5 to 15 mph. .THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 76-86. Highs 96-103. .FRIDAY...Partly cloudy with slight chance of showers. Lows 76-86. Highs 96-103. $$ AZZ131-CAZ231-190700- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 1152 AM MST Fri Sep 18 2026 /1152 AM PDT Fri Sep 18 2026/ .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................69-74. * 24 hr trend..................Little change. * Max Humidity....................28-39 pct. * 24 hr trend..................26 pct drier. * 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. .SATURDAY... * Sky/weather.....................Sunny. * Max Temperature.................98-103. * 24 hr trend..................Little change. * Min Humidity....................9-13 pct. * 24 hr trend..................4 pct drier. * Winds - 20 foot...Slope/Valley..Northwest 5 to 10 mph in the morning becoming west in the afternoon. * 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. * Mixing Height for Yuma..........8700 ft AGL. * Transport Wind for Yuma.........Southwest 5 knots. * Dispersion for Yuma.............Good. .SATURDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................69-74. * 24 hr trend..................Little change. * Max Humidity....................23-47 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southwest 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................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .SUNDAY... * Sky/weather.....................Partly sunny. * Max Temperature.................97-102. * 24 hr trend..................Little change. * Min Humidity....................12-20 pct. * 24 hr trend..................5 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...............0 percent. * Mixing Height for Yuma..........9800 ft AGL. * Transport Wind for Yuma.........South 9 knots. * Dispersion for Yuma.............Very good. .EXTENDED... .MONDAY...Mostly clear. Lows 71-78. Highs 96-101. South winds 5 to 15 mph. .TUESDAY...Clear. Lows 71-76. Highs 97-102. Southeast winds 5 to 10 mph. .WEDNESDAY...Clear. Lows 73-81. Highs 99-104. East winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows 76-83. Highs 100-105. .FRIDAY...Mostly clear. Lows 77-83. Highs 100-105. $$ AZZ133-190700- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 1152 AM MST Fri Sep 18 2026 .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................59-75. * 24 hr trend..................Little change. * Max Humidity....................51-78 pct. * 24 hr trend..................18 pct drier. * Winds - 20 foot...Slope/Valley..West 5 to 10 mph in the evening becoming east after midnight. * Winds...10000 FT MSL............Southwest 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............1 percent. .SATURDAY... * Sky/weather.....................Sunny. * Max Temperature.................82-97. * 24 hr trend..................Little change. * Min Humidity....................18-29 pct. * 24 hr trend..................10 pct drier. * Winds - 20 foot...Slope/Valley..Southeast 5 to 10 mph in the morning becoming southwest 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...............1 percent. .SATURDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................56-73. * 24 hr trend..................Little change. * Max Humidity....................40-61 pct. * 24 hr trend..................14 pct drier. * Winds - 20 foot...Slope/Valley..Northwest 5 to 10 mph in the evening becoming northeast after midnight. * 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. .SUNDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................81-96. * 24 hr trend..................Little change. * Min Humidity....................16-26 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............Southwest 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .EXTENDED... .MONDAY...Partly cloudy. Lows 58-75. Highs 80-96. Southeast winds 5 to 10 mph. .TUESDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 58-75. Highs 80-96. East winds 10 to 20 mph. .WEDNESDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 58-76. Highs 78-97. East winds 15 to 25 mph. .THURSDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 58-76. Highs 77-95. .FRIDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 59-76. Highs 77-95. $$ CAZ232-190700- Imperial County And Eastern Riverside County- 1152 AM PDT Fri Sep 18 2026 .TONIGHT... * Sky/weather.....................Clear. * Min Temperature.................70-76. * 24 hr trend..................Little change. * Max Humidity....................24-42 pct. * 24 hr trend..................25 pct drier. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............West 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .SATURDAY... * Sky/weather.....................Sunny. * Max Temperature.................93-102. * 24 hr trend..................Little change. * Min Humidity....................8-12 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph. * Winds...10000 FT MSL............Light and variable in the morning becoming southwest 5 to 15 mph in the afternoon. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .SATURDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................71-78. * 24 hr trend..................Little change. * Max Humidity....................19-42 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph. * Winds...10000 FT MSL............Light and variable. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .SUNDAY... * Sky/weather.....................Partly sunny. * Max Temperature.................93-102. * 24 hr trend..................Little change. * Min Humidity....................10-18 pct. * 24 hr trend..................4 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 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...............0 percent. .EXTENDED... .MONDAY...Mostly clear. Lows 70-79. Highs 90-100. Southwest winds 5 to 15 mph. .TUESDAY...Clear. Lows 70-79. Highs 91-101. Northwest winds 5 to 15 mph. .WEDNESDAY...Clear. Lows 72-81. Highs 94-104. Northeast winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 75-83. Highs 95-105. .FRIDAY...Mostly clear. Lows 77-83. Highs 95-105. $$ CAZ230-190700- Joshua Tree National Park- 1152 AM PDT Fri Sep 18 2026 .TONIGHT... * Sky/weather.....................Clear. * Min Temperature.................63-72. * 24 hr trend..................Little change. * Max Humidity....................29-35 pct. * 24 hr trend..................24 pct drier. * Winds - 20 foot...Slope/Valley..Northwest 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. .SATURDAY... * Sky/weather.....................Sunny. * Max Temperature.................82-95. * 24 hr trend..................Little change. * Min Humidity....................11-15 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph. * Winds...10000 FT MSL............Southwest 5 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .SATURDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................65-73. * 24 hr trend..................Little change. * Max Humidity....................22-27 pct. * 24 hr trend..................8 pct drier. * Winds - 20 foot...Slope/Valley..Light and variable in the evening becoming northwest 5 to 10 mph after midnight. * 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. .SUNDAY... * Sky/weather.....................Partly sunny. * Max Temperature.................82-95. * 24 hr trend..................Little change. * Min Humidity....................11-17 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..North 5 to 10 mph in the morning becoming south 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. .EXTENDED... .MONDAY...Mostly clear. Lows 62-76. Highs 78-92. Southwest winds 5 to 15 mph. .TUESDAY...Clear. Lows 62-73. Highs 80-93. North winds 5 to 15 mph. .WEDNESDAY...Clear. Lows 64-75. Highs 83-96. Northeast winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 66-77. Highs 84-97. .FRIDAY...Mostly clear. Lows 67-77. Highs 83-96. $$ .8 TO 10 DAY OUTLOOK...Saturday September 26th through Monday September 28th: Above normal temperatures and near to above median precipitation.