507
FNUS55 KPSR 130748
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
1248 AM MST SUN SEP 13 2026
DISCUSSION
CHANCES FOR SCATTERED SHOWERS AND ISOLATED STORMS WILL CONTINUE
TODAY BEFORE INCREASING AND BECOMING MORE WIDESPREAD INTO THE
SOUTH-CENTRAL ARIZONA LOWER DESERTS BEGINNING MONDAY. MOISTURE
LEVELS WILL REMAIN HIGH ENOUGH TO SUPPORT LOCALIZED HEAVY
RAINFALL WITH ANY STORMS. MINIMUM HUMIDITY LEVELS OVER THE NEXT
SEVERAL DAYS WILL ONLY FALL INTO A 15-25% RANGE IN WESTERN
DISTRICTS AND 25-40% IN EASTERN DISTRICTS. THIS WILL FOLLOW FAIR
TO GOOD OVERNIGHT RECOVERY OF 40-70%. OUTSIDE OF THUNDERSTORMS,
WINDS WILL GENERALLY REMAIN LIGHT WITH A SOUTHWEST HEADING THROUGH
NEARLY CALM CONDITIONS WILL BE COMMON IN THE MORNING HOURS.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-132000-
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-
1248 AM MST SUN SEP 13 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................97-104.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................27-32 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 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.
* MIXING HEIGHT FOR PHOENIX.......8800 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 7 KNOTS.
* DISPERSION FOR PHOENIX..........GOOD.
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................78-88.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................51-62 PCT.
* 24 HR TREND..................4 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...............1 PERCENT.
MONDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MAX TEMPERATURE.................98-105.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................24-29 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...............1 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......11800 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 11 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
EXTENDED
TUESDAY
MOSTLY CLEAR. LOWS 74-84. HIGHS 96-103. SOUTH WINDS
10 TO 20 MPH.
WEDNESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 74-84. HIGHS 95-104. SOUTHEAST WINDS 5 TO
15 MPH.
THURSDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 75-85. HIGHS 97-104. SOUTHEAST WINDS 5 TO
10 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 77-87. HIGHS 100-107.
SATURDAY
MOSTLY CLEAR. LOWS 77-87. HIGHS 100-108.
AZZ131-CAZ231-132000-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
1248 AM MST SUN SEP 13 2026 /1248 AM PDT SUN SEP 13 2026/
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................101-106.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................28-33 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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.
* MIXING HEIGHT FOR YUMA..........8000 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 11 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................79-84.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................51-70 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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.
MONDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................101-106.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................24-29 PCT.
* 24 HR TREND..................5 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.
* MIXING HEIGHT FOR YUMA..........7200 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 12 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
EXTENDED
TUESDAY
CLEAR. LOWS 75-82. HIGHS 99-104. SOUTH WINDS 10 TO
20 MPH.
WEDNESDAY
CLEAR. LOWS 74-79. HIGHS 100-105. SOUTH WINDS 10 TO
20 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 75-82. HIGHS 101-106. SOUTH WINDS
5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 77-84. HIGHS 103-108.
SATURDAY
MOSTLY CLEAR. LOWS 77-84. HIGHS 104-109.
AZZ133-132000-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
1248 AM MST SUN SEP 13 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS .
* MAX TEMPERATURE.................84-98.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................29-40 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE MORNING
BECOMING SOUTHWEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 15 MPH.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............14 PERCENT.
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS .
* MIN TEMPERATURE.................63-80.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................58-84 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE EVENING
BECOMING MOSTLY DOWNSLOPE/DOWNVALLEY AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................30 PERCENT.
* CWR (>= 0.10 IN)................10 PERCENT.
* CHANCE OF THUNDER...............24 PERCENT.
MONDAY
* SKY/WEATHER.....................PARTLY SUNNY. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS.
* MAX TEMPERATURE.................82-97.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................29-43 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE MORNING
BECOMING SOUTHWEST 5 TO 15 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................40 PERCENT.
* CWR (>= 0.10 IN)................20 PERCENT.
* CHANCE OF THUNDER...............24 PERCENT.
EXTENDED
TUESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 61-79. HIGHS 81-95. SOUTHEAST WINDS 5 TO
15 MPH.
WEDNESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 60-77. HIGHS 79-95. SOUTHEAST WINDS 5 TO
10 MPH.
THURSDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 60-77. HIGHS 80-97. EAST WINDS 5 TO
10 MPH.
FRIDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 60-77. HIGHS 83-100.
SATURDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 60-78. HIGHS 83-100.
CAZ232-132000-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
1248 AM PDT SUN SEP 13 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................96-107.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................15-28 PCT.
* 24 HR TREND..................10 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.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................75-82.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................27-58 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.
MONDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................96-105.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................10-22 PCT.
* 24 HR TREND..................5 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.
EXTENDED
TUESDAY
CLEAR. LOWS 72-80. HIGHS 94-104. SOUTH WINDS 5 TO
15 MPH.
WEDNESDAY
CLEAR. LOWS 72-79. HIGHS 95-105. SOUTH WINDS 5 TO
15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 73-81. HIGHS 95-105. SOUTH WINDS
5 TO 10 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 75-84. HIGHS 98-107.
SATURDAY
CLEAR. LOWS 77-84. HIGHS 99-109.
CAZ230-132000-
JOSHUA TREE NATIONAL PARK-
1248 AM PDT SUN SEP 13 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................86-99.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................18-26 PCT.
* 24 HR TREND..................8 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.
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................66-76.
* 24 HR TREND..................4 DEGREES COOLER.
* MAX HUMIDITY....................34-41 PCT.
* 24 HR TREND..................17 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.
MONDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................85-98.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................13-18 PCT.
* 24 HR TREND..................6 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 10 MPH IN THE
MORNING BECOMING SOUTH 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
TUESDAY
CLEAR. LOWS 64-75. HIGHS 82-97. SOUTHWEST WINDS 10 TO
20 MPH.
WEDNESDAY
CLEAR. LOWS 64-74. HIGHS 82-97. SOUTHWEST WINDS 5 TO
15 MPH.
THURSDAY
CLEAR. LOWS 64-76. HIGHS 84-98. SOUTHWEST WINDS 5 TO
15 MPH.
FRIDAY
CLEAR. LOWS 66-77. HIGHS 87-100.
SATURDAY
CLEAR. LOWS 68-79. HIGHS 88-101.
8 TO 10 DAY OUTLOOK
SUNDAY SEPTEMBER 20TH THROUGH TUESDAY
SEPTEMBER 22ND: ABOVE NORMAL TEMPERATURES AND NEAR TO ABOVE
MEDIAN PRECIPITATION.
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