364
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 THU AUG 13 2026
DISCUSSION
ELEVATED HUMIDITY LEVELS, BELOW NORMAL TEMPERATURES, AND
LINGERING CHANCES FOR SHOWERS AND A FEW THUNDERSTORMS ARE
EXPECTED TODAY BEFORE MUCH DRIER AIR FILTERS INTO THE REGION
FRIDAY INTO THE WEEKEND. AFTERNOON MINRHS OF 30-50% TODAY WILL
DROP TO 20-30% BY SATURDAY AND INTO THE TEENS ACROSS THE LOWER
DESERTS STARTING SUNDAY. OVERNIGHT RECOVERIES WILL REMAIN GOOD TO
EXCELLENT. WINDS WILL REMAIN PREDOMINATELY OUT OF THE SOUTH
SOUTHWEST MUCH OF THE PERIOD WITH OVERNIGHT LIGHT EASTERLY
DOWNSLOPING WINDS OVER THE EASTERN DISTRICTS.
..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 THU AUG 13 2026
TODAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................94-102.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................28-37 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH IN THE
MORNING BECOMING SOUTH 5 TO 10 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
20 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............16 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......12200 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 10 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING.
* MIN TEMPERATURE.................75-85.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................56-69 PCT.
* 24 HR TREND..................7 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH.
* CHANCE OF PRECIP................10 PERCENT IN THE EVENING
BECOMING 0 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............12 PERCENT.
FRIDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................94-102.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................25-31 PCT.
* 24 HR TREND..................5 PCT DRIER.
* 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...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......10100 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTH 7 KNOTS.
* DISPERSION FOR PHOENIX..........GOOD.
EXTENDED
SATURDAY
PARTLY CLOUDY. LOWS 76-86. HIGHS 98-105. SOUTH WINDS
5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 79-89. HIGHS 102-109. SOUTHWEST
WINDS 5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 81-91. HIGHS 105-112. SOUTHWEST
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 83-93. HIGHS 106-112.
WEDNESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS. LOWS
82-92. HIGHS 105-111.
AZZ131-CAZ231-132000-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
1248 AM MST THU AUG 13 2026 /1248 AM PDT THU AUG 13 2026/
TODAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................98-103.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................28-36 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............11 PERCENT.
* MIXING HEIGHT FOR YUMA..........8700 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTHWEST 7 KNOTS.
* DISPERSION FOR YUMA.............GOOD.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING.
* MIN TEMPERATURE.................78-83.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................53-64 PCT.
* 24 HR TREND..................7 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 15 MPH.
* CHANCE OF PRECIP................10 PERCENT IN THE EVENING
BECOMING 0 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............11 PERCENT.
FRIDAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................98-103.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................27-33 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
10 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............14 PERCENT.
* MIXING HEIGHT FOR YUMA..........11000 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 7 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
EXTENDED
SATURDAY
MOSTLY CLEAR. LOWS 77-85. HIGHS 101-106. SOUTH WINDS
5 TO 15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 81-86. HIGHS 104-109. SOUTH WINDS
5 TO 15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 82-87. HIGHS 107-112. SOUTHWEST
WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 82-87. HIGHS 108-113.
WEDNESDAY
MOSTLY CLEAR. LOWS 82-87. HIGHS 107-112.
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 THU AUG 13 2026
TODAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MAX TEMPERATURE.................78-94.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................34-52 PCT.
* 24 HR TREND..................7 PCT WETTER.
* 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................50 PERCENT.
* CWR (>= 0.10 IN)................30 PERCENT.
* CHANCE OF THUNDER...............24 PERCENT.
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MIN TEMPERATURE.................61-76.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................64-90 PCT.
* 24 HR TREND..................8 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE EVENING
BECOMING EAST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 15 MPH.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............17 PERCENT.
FRIDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................81-96.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................29-43 PCT.
* 24 HR TREND..................8 PCT DRIER.
* 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 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
SATURDAY
PARTLY CLOUDY. LOWS 61-80. HIGHS 86-100. NORTHWEST
WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 64-82. HIGHS 88-104. EAST WINDS
5 TO 10 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 65-83. HIGHS 90-106. EAST WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 66-84. HIGHS 91-107.
WEDNESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 67-84. HIGHS 91-106.
CAZ232-132000-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
1248 AM PDT THU AUG 13 2026
TODAY
* SKY/WEATHER.....................MOSTLY CLOUDY.
* MAX TEMPERATURE.................93-103.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................21-30 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.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY.
* MIN TEMPERATURE.................77-83.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................44-62 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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.
FRIDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................94-103.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................23-31 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
10 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............12 PERCENT.
EXTENDED
SATURDAY
MOSTLY CLEAR. LOWS 77-85. HIGHS 96-104. SOUTH WINDS
5 TO 10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 80-87. HIGHS 99-108. WEST WINDS 5 TO
15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 81-87. HIGHS 101-111. WEST WINDS
5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 81-87. HIGHS 102-112.
WEDNESDAY
MOSTLY CLEAR. LOWS 81-87. HIGHS 102-112.
CAZ230-132000-
JOSHUA TREE NATIONAL PARK-
1248 AM PDT THU AUG 13 2026
TODAY
* SKY/WEATHER.....................MOSTLY CLOUDY.
* MAX TEMPERATURE.................82-96.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................22-32 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.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY.
* MIN TEMPERATURE.................65-80.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................44-55 PCT.
* 24 HR TREND..................7 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 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.
FRIDAY
* SKY/WEATHER.....................PARTLY SUNNY IN THE MORNING
BECOMING SUNNY IN THE AFTERNOON.
* MAX TEMPERATURE.................84-97.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................23-30 PCT.
* 24 HR TREND..................LITTLE 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.
EXTENDED
SATURDAY
MOSTLY CLEAR. LOWS 65-81. HIGHS 85-99. SOUTHWEST
WINDS 5 TO 15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 68-83. HIGHS 89-102. WEST WINDS 5 TO
15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 69-83. HIGHS 91-105. WEST WINDS 5 TO
15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 70-83. HIGHS 92-106.
WEDNESDAY
MOSTLY CLEAR. LOWS 70-83. HIGHS 92-106.
8 TO 10 DAY OUTLOOK
THURSDAY AUGUST 25TH THROUGH SATURDAY
AUGUST 22ND: ABOVE NORMAL TEMPERATURES AND ABOVE MEDIAN
PRECIPITATION.
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