Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Phoenix, AZ
Issued by NWS Phoenix, AZ
759 FNUS55 KPSR 162054 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 154 PM MST Wed Sep 16 2026 .DISCUSSION... Periods of scattered to widespread showers and thunderstorms are expected to continue today, focusing mostly across the eastern districts this afternoon through this evening, however widespread activity over much of the lower deserts can be expected. There will be a heavy rainfall and flood threat with the activity. Moisture levels will be elevated most areas, highest across eastern districts, where minimum RH this afternoon will be around 50-60%. Minimum RHs will be lowest across southeast CA, with values around 20-30%. A drying trend will begin Thursday with conditions becoming very dry by this weekend. Minimum RHs by Saturday dip to 10-25% across the lower deserts (lowest across western districts). Overnight recoveries will still be good across eastern districts this weekend at 40-60%, while western districts hover around 25-45%. The drier air moving in will eliminate rain chances by Friday, with low chances in Gila County Thursday afternoon. Winds will favor the south to southeast over much of the area through Wednesday with gusts of 20-30 mph at times across southwest AZ and southeast CA. In the following days winds will return to a more typical diurnal with modest afternoon upslope gustiness. ...Thunderstorms imply gusty winds... Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-170900- 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- 154 PM MST Wed Sep 16 2026 .TONIGHT... * Sky/weather.....................Partly cloudy. Slight chance of thunderstorms in the evening. chance of showers . slight chance of thunderstorms after midnight. * Min Temperature.................71-81. * 24 hr trend..................4 degrees cooler. * Max Humidity....................71-87 pct. * 24 hr trend..................11 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................50 percent. * CWR (>= 0.10 IN)................10 percent west portion...50 percent east portion. * Chance of Thunder...............28 percent. .THURSDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................90-99. * 24 hr trend..................4 degrees warmer. * Min Humidity....................27-42 pct. * 24 hr trend..................10 pct drier. * Winds - 20 foot...Slope/Valley..Southeast 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 Phoenix.......6100 ft AGL. * Transport Wind for Phoenix......South 3 knots. * Dispersion for Phoenix..........Fair. .THURSDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................72-82. * 24 hr trend..................Little change. * Max Humidity....................53-74 pct. * 24 hr trend..................16 pct drier. * Winds - 20 foot...Slope/Valley..East 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. .FRIDAY... * Sky/weather.....................Sunny. * Max Temperature.................95-102. * 24 hr trend..................4 degrees warmer. * Min Humidity....................16-28 pct. * 24 hr trend..................14 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...............0 percent. * Mixing Height for Phoenix.......9500 ft AGL. * Transport Wind for Phoenix......Southwest 7 knots. * Dispersion for Phoenix..........Good. .EXTENDED... .SATURDAY...Clear. Lows 72-82. Highs 97-104. Southwest winds 5 to 10 mph. Minimum relative humidity may be lower than 15 percent. .SUNDAY...Mostly clear. Lows 72-82. Highs 96-103. South winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 73-83. Highs 95-102. South winds 5 to 15 mph. .TUESDAY...Mostly clear. Lows 73-83. Highs 95-102. .WEDNESDAY...Mostly clear with slight chance of showers. Lows 73-83. Highs 95-102. $$ AZZ131-CAZ231-170900- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 154 PM MST Wed Sep 16 2026 /154 PM PDT Wed Sep 16 2026/ .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................75-80. * 24 hr trend..................Little change. * Max Humidity....................69-82 pct. * 24 hr trend..................10 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 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...............4 percent. .THURSDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................97-102. * 24 hr trend..................Little change. * Min Humidity....................25-34 pct. * 24 hr trend..................6 pct drier. * Winds - 20 foot...Slope/Valley..Southeast 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...............1 percent. * Mixing Height for Yuma..........8200 ft AGL. * Transport Wind for Yuma.........South 8 knots. * Dispersion for Yuma.............Good. .THURSDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................72-77. * 24 hr trend..................3 degrees cooler. * Max Humidity....................46-62 pct. * 24 hr trend..................22 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...............0 percent. .FRIDAY... * Sky/weather.....................Sunny. * Max Temperature.................98-103. * 24 hr trend..................Little change. * Min Humidity....................11-17 pct. * 24 hr trend..................15 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. * Mixing Height for Yuma..........7500 ft AGL. * Transport Wind for Yuma.........West 6 knots. * Dispersion for Yuma.............Good. .EXTENDED... .SATURDAY...Clear. Lows 70-75. Highs 100-105. West winds 5 to 10 mph. Minimum relative humidity may be lower than 15 percent. .SUNDAY...Mostly clear. Lows 71-76. Highs 99-104. South winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .MONDAY...Mostly clear. Lows 71-76. Highs 98-103. South winds 5 to 15 mph. .TUESDAY...Clear. Lows 72-77. Highs 99-104. .WEDNESDAY...Clear. Lows 72-79. Highs 99-104. $$ AZZ133-170900- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 154 PM MST Wed Sep 16 2026 .TONIGHT... * Sky/weather.....................Mostly cloudy. Showers and chance of thunderstorms in the evening becoming chance of showers and slight chance of thunderstorms after midnight. * Min Temperature.................59-72. * 24 hr trend..................3 degrees cooler. * Max Humidity....................81-100 pct. * 24 hr trend..................11 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 15 mph. * Winds...10000 FT MSL............South 20 to 30 mph. * Chance of Precip................80 percent. * CWR (>= 0.10 IN)................90 percent. * Chance of Thunder...............41 percent. .THURSDAY... * Sky/weather.....................Partly sunny. Slight chance of showers and thunderstorms. * Max Temperature.................76-90. * 24 hr trend..................4 degrees warmer. * Min Humidity....................41-58 pct. * 24 hr trend..................8 pct drier. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............Southwest 15 to 25 mph. * Chance of Precip................20 percent. * CWR (>= 0.10 IN)................10 percent. * Chance of Thunder...............13 percent. .THURSDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................59-73. * 24 hr trend..................Little change. * Max Humidity....................71-90 pct. * 24 hr trend..................12 pct drier. * Winds - 20 foot...Slope/Valley..Light and variable in the evening becoming northeast 5 to 10 mph after midnight. * Winds...10000 FT MSL............South 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............1 percent. .FRIDAY... * Sky/weather.....................Sunny. * Max Temperature.................80-95. * 24 hr trend..................5 degrees warmer. * Min Humidity....................29-43 pct. * 24 hr trend..................13 pct drier. * Winds - 20 foot...Slope/Valley..East 5 to 10 mph in the morning becoming south in the afternoon. * 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. .EXTENDED... .SATURDAY...Clear. Lows 57-74. Highs 81-96. East winds 5 to 15 mph. .SUNDAY...Mostly clear. Lows 57-74. Highs 81-96. East winds 5 to 10 mph. .MONDAY...Partly cloudy. Lows 57-74. Highs 80-95. East winds 5 to 10 mph. .TUESDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 56-73. Highs 79-96. .WEDNESDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 56-74. Highs 78-95. $$ CAZ232-170900- Imperial County And Eastern Riverside County- 154 PM PDT Wed Sep 16 2026 .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................73-79. * 24 hr trend..................Little change. * Max Humidity....................48-79 pct. * 24 hr trend..................11 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 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...............1 percent. .THURSDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................90-100. * 24 hr trend..................Little change. * Min Humidity....................20-30 pct. * 24 hr trend..................Little change. * 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. .THURSDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................72-77. * 24 hr trend..................Little change. * Max Humidity....................34-53 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. .FRIDAY... * Sky/weather.....................Sunny. * Max Temperature.................92-102. * 24 hr trend..................Little change. * Min Humidity....................8-15 pct. * 24 hr trend..................13 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. .EXTENDED... .SATURDAY...Clear. Lows 71-79. Highs 94-103. Northwest winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .SUNDAY...Mostly clear. Lows 72-79. Highs 94-104. Southwest winds 5 to 10 mph. Minimum relative humidity may be lower than 15 percent. .MONDAY...Mostly clear. Lows 71-78. Highs 92-102. Southwest winds 5 to 15 mph. .TUESDAY...Clear. Lows 71-79. Highs 93-103. .WEDNESDAY...Mostly clear. Lows 72-81. Highs 93-103. $$ CAZ230-170900- Joshua Tree National Park- 154 PM PDT Wed Sep 16 2026 .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................62-74. * 24 hr trend..................Little change. * Max Humidity....................61-87 pct. * 24 hr trend..................27 pct wetter. * 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. .THURSDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................78-93. * 24 hr trend..................Little change. * Min Humidity....................21-30 pct. * 24 hr trend..................4 pct wetter. * 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. .THURSDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................62-71. * 24 hr trend..................Little change. * Max Humidity....................38-47 pct. * 24 hr trend..................34 pct drier. * Winds - 20 foot...Slope/Valley..West 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. .FRIDAY... * Sky/weather.....................Sunny. * Max Temperature.................81-94. * 24 hr trend..................Little change. * Min Humidity....................13-17 pct. * 24 hr trend..................11 pct drier. * Winds - 20 foot...Slope/Valley..Northwest 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...............0 percent. .EXTENDED... .SATURDAY...Clear. Lows 64-73. Highs 83-96. Northwest winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .SUNDAY...Mostly clear. Lows 65-74. Highs 82-97. Southwest winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .MONDAY...Mostly clear. Lows 64-74. Highs 81-95. Southwest winds 5 to 15 mph. .TUESDAY...Clear. Lows 64-73. Highs 82-95. .WEDNESDAY...Mostly clear. Lows 64-74. Highs 81-95. $$ .8 TO 10 DAY OUTLOOK...Thursday September 24th through Saturday September 26th: Above normal temperatures and near to above median precipitation.