Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Phoenix, AZ
Issued by NWS Phoenix, AZ
058 FNUS55 KPSR 180846 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 146 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. AZZ132-182100- 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- 146 AM MST Fri Sep 18 2026 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................95-102. * 24 hr trend..................5 degrees warmer. * Min Humidity....................17-25 pct. * 24 hr trend..................15 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.......9900 ft AGL. * Transport Wind for Phoenix......Southwest 6 knots. * Dispersion for Phoenix..........Good. .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................71-81. * 24 hr trend..................Little change. * Max Humidity....................26-57 pct. * 24 hr trend..................20 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....................11-19 pct. * 24 hr trend..................6 pct drier. * 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 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. * Mixing Height for Phoenix.......10600 ft AGL. * Transport Wind for Phoenix......Southwest 6 knots. * Dispersion for Phoenix..........Good. .EXTENDED... .SUNDAY...Mostly clear. Lows 71-81. Highs 96-103. South winds 5 to 10 mph. .MONDAY...Mostly clear. Lows 71-81. Highs 95-102. South winds 5 to 15 mph. .TUESDAY...Mostly clear. Lows 71-81. Highs 95-102. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 73-83. Highs 97-104. .THURSDAY...Mostly clear. Lows 75-85. Highs 96-103. $$ AZZ131-CAZ231-182100- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 146 AM MST Fri Sep 18 2026 /146 AM PDT Fri Sep 18 2026/ .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................98-103. * 24 hr trend..................Little change. * Min Humidity....................12-19 pct. * 24 hr trend..................14 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..........7200 ft AGL. * Transport Wind for Yuma.........West 6 knots. * Dispersion for Yuma.............Good. .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................69-74. * 24 hr trend..................3 degrees cooler. * Max Humidity....................28-40 pct. * 24 hr trend..................24 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.................98-104. * 24 hr trend..................Little change. * Min Humidity....................9-13 pct. * 24 hr trend..................5 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..........8800 ft AGL. * Transport Wind for Yuma.........Southwest 5 knots. * Dispersion for Yuma.............Good. .EXTENDED... .SUNDAY...Mostly clear. Lows 69-77. Highs 98-103. South winds 5 to 15 mph. .MONDAY...Mostly clear. Lows 70-77. Highs 97-102. South winds 5 to 15 mph. .TUESDAY...Clear. Lows 70-76. Highs 98-103. South winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 72-79. Highs 100-105. .THURSDAY...Mostly clear. Lows 74-81. Highs 99-104. $$ AZZ133-182100- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 146 AM MST Fri Sep 18 2026 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................80-96. * 24 hr trend..................6 degrees warmer. * Min Humidity....................26-43 pct. * 24 hr trend..................13 pct drier. * 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................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............2 percent. .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................59-73. * 24 hr trend..................Little change. * Max Humidity....................57-81 pct. * 24 hr trend..................10 pct drier. * Winds - 20 foot...Slope/Valley..West 5 to 10 mph in the evening becoming east 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. .SATURDAY... * Sky/weather.....................Sunny. * Max Temperature.................81-96. * 24 hr trend..................Little change. * Min Humidity....................19-32 pct. * 24 hr trend..................9 pct drier. * 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 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .EXTENDED... .SUNDAY...Mostly clear. Lows 56-74. Highs 81-96. East winds 5 to 15 mph. .MONDAY...Partly cloudy. Lows 57-74. Highs 80-96. Southeast winds 5 to 10 mph. .TUESDAY...Mostly clear with slight chance of showers and thunderstorms. Lows 58-75. Highs 80-97. Southeast winds 10 to 20 mph. .WEDNESDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 58-76. Highs 79-97. .THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 58-76. Highs 79-97. $$ CAZ232-182100- Imperial County And Eastern Riverside County- 146 AM PDT Fri Sep 18 2026 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................92-102. * 24 hr trend..................Little change. * Min Humidity....................8-15 pct. * 24 hr trend..................16 pct drier. * Winds - 20 foot...Slope/Valley..Northwest 5 to 10 mph in the morning becoming southwest in the afternoon. * Winds...10000 FT MSL............Southwest 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................70-75. * 24 hr trend..................Little change. * Max Humidity....................25-43 pct. * 24 hr trend..................16 pct drier. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph. * Winds...10000 FT MSL............Southwest 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .SATURDAY... * Sky/weather.....................Sunny. * Max Temperature.................93-102. * 24 hr trend..................Little change. * Min Humidity....................8-13 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph. * Winds...10000 FT MSL............Southwest 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .EXTENDED... .SUNDAY...Partly cloudy. Lows 70-77. Highs 93-102. South winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .MONDAY...Mostly clear. Lows 70-77. Highs 91-101. Southwest winds 5 to 15 mph. .TUESDAY...Clear. Lows 70-78. Highs 93-102. Northwest winds 5 to 15 mph. .WEDNESDAY...Mostly clear. Lows 72-80. Highs 95-104. .THURSDAY...Mostly clear. Lows 74-81. Highs 94-104. $$ CAZ230-182100- Joshua Tree National Park- 146 AM PDT Fri Sep 18 2026 .TODAY... * Sky/weather.....................Sunny. * Max Temperature.................80-94. * 24 hr trend..................Little change. * Min Humidity....................12-16 pct. * 24 hr trend..................15 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 15 to 25 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .TONIGHT... * Sky/weather.....................Clear. * Min Temperature.................63-71. * 24 hr trend..................Little change. * Max Humidity....................30-36 pct. * 24 hr trend..................13 pct drier. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph. * Winds...10000 FT MSL............Southwest 5 to 15 mph in the evening becoming light and variable after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .SATURDAY... * Sky/weather.....................Sunny. * Max Temperature.................82-94. * 24 hr trend..................Little change. * Min Humidity....................10-14 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph in the morning becoming northeast 5 to 10 mph in the afternoon. * 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. .EXTENDED... .SUNDAY...Partly cloudy. Lows 65-74. Highs 81-96. Southwest winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .MONDAY...Mostly clear. Lows 63-74. Highs 79-93. Southwest winds 5 to 15 mph. .TUESDAY...Clear. Lows 63-72. Highs 80-94. North winds 5 to 15 mph. .WEDNESDAY...Clear. Lows 65-74. Highs 83-96. .THURSDAY...Mostly clear. Lows 66-74. Highs 83-96. $$ .8 TO 10 DAY OUTLOOK...Friday September 25th through Sunday September 27th: Above normal temperatures and near to above median precipitation.