184
FNUS55 KPSR 240733
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
1233 AM MST MON AUG 24 2026
DISCUSSION
HOT AND SEASONALLY DRY CONDITIONS WILL PREVAIL FOR MUCH IF NOT ALL
OF THE COMING WEEK. STRONG HIGH PRESSURE WILL SETTLE OVER THE
REGION BY MIDWEEK WITH GRADUAL DRYING CONDITIONS. MINIMUM RHS
TODAY WILL MOSTLY FALL BETWEEN 20-30%, BEFORE DROPPING BACK INTO
THE TEENS STARTING TUESDAY. TEMPERATURES WILL BE AROUND 5-10
DEGREES ABOVE NORMAL, WITH LOWER DESERT HIGHS ECLIPSING 110
DEGREES NEARLY EVERY AFTERNOON. EXPECT OVERALL LIGHT WINDS
FOLLOWING TYPICAL DIURNAL TENDENCIES WITH SOME MODEST AFTERNOON
UPSLOPE GUSTINESS.
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-241945-
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 MON AUG 24 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................103-109.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................21-26 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE MORNING
BECOMING SOUTHWEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHEAST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......10500 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 7 KNOTS.
* DISPERSION FOR PHOENIX..........GOOD.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................82-92.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................41-52 PCT.
* 24 HR TREND..................11 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TUESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................107-114.
* 24 HR TREND..................5 DEGREES WARMER.
* MIN HUMIDITY....................14-18 PCT.
* 24 HR TREND..................7 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......15400 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 5 KNOTS.
* DISPERSION FOR PHOENIX..........FAIR.
EXTENDED
WEDNESDAY
MOSTLY CLEAR. LOWS 83-93. HIGHS 109-116. WEST WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
THURSDAY
MOSTLY CLEAR. LOWS 83-93. HIGHS 108-114. SOUTHWEST
WINDS 5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 83-93. HIGHS 107-113. SOUTHWEST
WINDS 5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 82-92. HIGHS 105-111.
SUNDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 79-89. HIGHS 102-109.
AZZ131-CAZ231-241945-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
1233 AM MST MON AUG 24 2026 /1233 AM PDT MON AUG 24 2026/
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................105-110.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................22-26 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........8200 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 9 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................83-88.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................44-55 PCT.
* 24 HR TREND..................12 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TUESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................109-114.
* 24 HR TREND..................4 DEGREES WARMER.
* MIN HUMIDITY....................15-19 PCT.
* 24 HR TREND..................8 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 10 MPH IN THE
MORNING BECOMING SOUTHWEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 5 TO 15 MPH IN THE MORNING
BECOMING LIGHT AND VARIABLE IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........13500 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTHWEST 6 KNOTS.
* DISPERSION FOR YUMA.............MARGINAL.
EXTENDED
WEDNESDAY
MOSTLY CLEAR. LOWS 84-89. HIGHS 112-117. WEST WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
THURSDAY
MOSTLY CLEAR. LOWS 84-89. HIGHS 110-115. SOUTH WINDS
5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 84-89. HIGHS 109-114. SOUTH WINDS
5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 84-89. HIGHS 108-113.
SUNDAY
MOSTLY CLEAR. LOWS 83-88. HIGHS 106-111.
AZZ133-241945-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
1233 AM MST MON AUG 24 2026
TODAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................92-106.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................18-26 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 10 MPH IN THE
MORNING BECOMING WEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............NORTHEAST 5 TO 15 MPH IN THE
MORNING BECOMING LIGHT AND VARIABLE IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................66-82.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................40-55 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................94-109.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................13-19 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHEAST 5 TO 10 MPH IN THE
MORNING BECOMING WEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
WEDNESDAY
MOSTLY CLEAR. LOWS 67-85. HIGHS 95-111. NORTHEAST
WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 67-85. HIGHS 94-110. NORTHEAST
WINDS 5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 67-84. HIGHS 94-109. NORTHEAST WINDS 5 TO
15 MPH.
SATURDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 67-84. HIGHS 92-107.
SUNDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 65-83. HIGHS 89-104.
CAZ232-241945-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
1233 AM PDT MON AUG 24 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................100-109.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................20-28 PCT.
* 24 HR TREND..................9 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................83-89.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................33-53 PCT.
* 24 HR TREND..................18 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 10 MPH IN THE
EVENING BECOMING NORTHWEST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE EVENING
BECOMING SOUTHEAST 5 TO 15 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TUESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................104-114.
* 24 HR TREND..................4 DEGREES WARMER.
* MIN HUMIDITY....................14-20 PCT.
* 24 HR TREND..................7 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 10 MPH IN THE
MORNING BECOMING SOUTHWEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
WEDNESDAY
MOSTLY CLEAR. LOWS 84-91. HIGHS 105-115. WEST WINDS
5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 84-91. HIGHS 105-114. SOUTHWEST
WINDS 5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 84-91. HIGHS 104-114. SOUTH WINDS
5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 83-91. HIGHS 103-113.
SUNDAY
MOSTLY CLEAR. LOWS 80-89. HIGHS 102-111.
CAZ230-241945-
JOSHUA TREE NATIONAL PARK-
1233 AM PDT MON AUG 24 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................91-104.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................20-26 PCT.
* 24 HR TREND..................9 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 5 TO 15 MPH IN THE MORNING
BECOMING LIGHT AND VARIABLE IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
10 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............13 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................73-85.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................31-39 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 10 MPH IN THE
EVENING BECOMING NORTHWEST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTHEAST 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................94-107.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................15-21 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 10 MPH IN THE MORNING
BECOMING SOUTH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 5 TO 15 MPH IN THE MORNING
BECOMING LIGHT AND VARIABLE IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
WEDNESDAY
MOSTLY CLEAR. LOWS 74-87. HIGHS 95-109. WEST WINDS
5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 75-87. HIGHS 95-109. WEST WINDS
5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 74-87. HIGHS 94-108. SOUTHWEST WINDS
5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 72-87. HIGHS 93-107.
SUNDAY
MOSTLY CLEAR. LOWS 70-85. HIGHS 91-105.
8 TO 10 DAY OUTLOOK
MONDAY AUGUST 31ST THROUGH WEDNESDAY
SEPTEMBER 2ND: ABOVE NORMAL TEMPERATURES AND NEAR MEDIAN
PRECIPITATION.
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