Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Phoenix, AZ
Issued by NWS Phoenix, AZ
994 FNUS55 KPSR 150733 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 1233 AM MST Tue Sep 15 2026 .DISCUSSION... Periods of scattered showers and thunderstorms are expected through Wednesday across the eastern districts supporting a heavy rainfall and localized flood threat. Moisture levels will remain elevated except for southeast California. Expect minimum humidity levels to still fall into a 15-25% range for the western districts while the eastern districts will only dip to 35-50% through Wednesday. Winds will favor the south to southeast over much of the area through Wednesday with gusts of 20-30 mph at times across southwest Arizona. ...Thunderstorms imply gusty winds... Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-151945- 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- 1233 AM MST Tue Sep 15 2026 .TODAY... * Sky/weather.....................Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. * Max Temperature.................94-101. * 24 hr trend..................4 degrees cooler. * Min Humidity....................27-36 pct. * 24 hr trend..................7 pct wetter. * 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...............5 percent. * Mixing Height for Phoenix.......8400 ft AGL. * Transport Wind for Phoenix......South 12 knots. * Dispersion for Phoenix..........Very good. .TONIGHT... * Sky/weather.....................Partly cloudy. Chance of showers and slight chance of thunderstorms. * Min Temperature.................74-84. * 24 hr trend..................Little change. * Max Humidity....................65-79 pct. * 24 hr trend..................8 pct wetter. * 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)................0 percent west portion...20 percent east portion. * Chance of Thunder...............6 percent. .WEDNESDAY... * Sky/weather.....................Partly sunny. Showers likely in the morning. slight chance of thunderstorms . chance of showers in the afternoon. * Max Temperature.................91-100. * 24 hr trend..................3 degrees cooler. * Min Humidity....................27-44 pct. * 24 hr trend..................3 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................0 percent west portion...40 percent east portion. * Chance of Thunder...............13 percent. * Mixing Height for Phoenix.......7900 ft AGL. * Transport Wind for Phoenix......South 5 knots. * Dispersion for Phoenix..........Fair. .EXTENDED... .THURSDAY...Mostly clear with chance of showers. Lows 73-83. Highs 93-102. Southeast winds 5 to 15 mph. .FRIDAY...Clear. Lows 74-84. Highs 98-105. South winds 5 to 10 mph. .SATURDAY...Clear. Lows 75-85. Highs 99-106. South winds 5 to 10 mph. .SUNDAY...Mostly clear. Lows 74-84. Highs 98-105. .MONDAY...Mostly clear. Lows 73-83. Highs 97-104. $$ AZZ131-CAZ231-151945- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 1233 AM MST Tue Sep 15 2026 /1233 AM PDT Tue Sep 15 2026/ .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................99-104. * 24 hr trend..................Little change. * Min Humidity....................23-31 pct. * 24 hr trend..................4 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 10 to 20 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..........5700 ft AGL. * Transport Wind for Yuma.........South 19 knots. * Dispersion for Yuma.............Excellent. .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................76-81. * 24 hr trend..................Little change. * Max Humidity....................64-76 pct. * 24 hr trend..................8 pct wetter. * 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. .WEDNESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................97-102. * 24 hr trend..................Little change. * Min Humidity....................21-31 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southeast 10 to 20 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. * Mixing Height for Yuma..........5800 ft AGL. * Transport Wind for Yuma.........South 14 knots. * Dispersion for Yuma.............Very good. .EXTENDED... .THURSDAY...Mostly clear. Lows 73-78. Highs 98-103. South winds 5 to 15 mph. .FRIDAY...Clear. Lows 73-78. Highs 101-106. Southwest winds 5 to 10 mph. Minimum relative humidity may be lower than 15 percent. .SATURDAY...Clear. Lows 73-79. Highs 102-107. West winds 5 to 10 mph. Minimum relative humidity may be lower than 15 percent. .SUNDAY...Mostly clear. Lows 73-79. Highs 101-106. .MONDAY...Mostly clear. Lows 72-77. Highs 99-104. $$ AZZ133-151945- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 1233 AM MST Tue Sep 15 2026 .TODAY... * Sky/weather.....................Partly sunny. Slight chance of thunderstorms in the morning. chance of showers . chance of thunderstorms in the afternoon. * Max Temperature.................78-93. * 24 hr trend..................5 degrees cooler. * Min Humidity....................35-54 pct. * 24 hr trend..................8 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 10 mph in the morning becoming southwest in the afternoon. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................30 percent. * CWR (>= 0.10 IN)................30 percent. * Chance of Thunder...............30 percent. .TONIGHT... * Sky/weather.....................Partly cloudy in the evening becoming mostly cloudy after midnight. Chance of thunderstorms in the evening. chance of showers . slight chance of thunderstorms after midnight. * Min Temperature.................60-75. * 24 hr trend..................Little change. * Max Humidity....................76-97 pct. * 24 hr trend..................3 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................60 percent. * CWR (>= 0.10 IN)................50 percent. * Chance of Thunder...............31 percent. .WEDNESDAY... * Sky/weather.....................Mostly cloudy. Showers likely and slight chance of thunderstorms in the morning becoming showers and chance of thunderstorms in the afternoon. * Max Temperature.................75-89. * 24 hr trend..................4 degrees cooler. * Min Humidity....................44-66 pct. * 24 hr trend..................10 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................80 percent. * CWR (>= 0.10 IN)................80 percent. * Chance of Thunder...............41 percent. .EXTENDED... .THURSDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 59-75. Highs 77-92. East winds 5 to 15 mph. .FRIDAY...Mostly clear. Lows 58-76. Highs 80-97. East winds 5 to 15 mph. .SATURDAY...Mostly clear. Lows 58-76. Highs 81-98. East winds 5 to 15 mph. .SUNDAY...Mostly clear. Lows 58-75. Highs 81-98. .MONDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 57-75. Highs 79-96. $$ CAZ232-151945- Imperial County And Eastern Riverside County- 1233 AM PDT Tue Sep 15 2026 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................94-104. * 24 hr trend..................3 degrees cooler. * Min Humidity....................17-26 pct. * 24 hr trend..................5 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................72-79. * 24 hr trend..................Little change. * Max Humidity....................36-74 pct. * 24 hr trend..................6 pct wetter. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .WEDNESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................92-102. * 24 hr trend..................Little change. * Min Humidity....................14-23 pct. * 24 hr trend..................3 pct drier. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .EXTENDED... .THURSDAY...Mostly clear. Lows 72-78. Highs 92-102. Southwest winds 5 to 15 mph. .FRIDAY...Clear. Lows 72-79. Highs 95-104. West winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .SATURDAY...Clear. Lows 73-79. Highs 97-106. West winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .SUNDAY...Mostly clear. Lows 72-79. Highs 96-105. .MONDAY...Mostly clear. Lows 72-77. Highs 94-103. $$ CAZ230-151945- Joshua Tree National Park- 1233 AM PDT Tue Sep 15 2026 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................82-97. * 24 hr trend..................5 degrees cooler. * Min Humidity....................19-25 pct. * 24 hr trend..................9 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. .TONIGHT... * Sky/weather.....................Clear. * Min Temperature.................63-73. * 24 hr trend..................3 degrees cooler. * Max Humidity....................32-57 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............Southwest 20 to 30 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .WEDNESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................79-94. * 24 hr trend..................Little change. * Min Humidity....................13-21 pct. * 24 hr trend..................5 pct drier. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............Southwest 20 to 30 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .EXTENDED... .THURSDAY...Clear. Lows 62-73. Highs 80-94. Southwest winds 5 to 15 mph. .FRIDAY...Clear. Lows 63-73. Highs 83-96. Northwest winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .SATURDAY...Clear. Lows 65-74. Highs 85-98. Northwest winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .SUNDAY...Mostly clear. Lows 64-74. Highs 84-98. .MONDAY...Mostly clear. Lows 63-73. Highs 82-96. $$ .8 TO 10 DAY OUTLOOK...Tuesday September 22nd through Thursday September 24th: Above normal temperatures and near to above median precipitation.