364
FNUS55 KPSR 110742
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
1242 AM MST TUE AUG 11 2026
DISCUSSION
SCATTERED SHOWERS AND THUNDERSTORMS ARE ANTICIPATED EACH DAY
THROUGH MIDWEEK ACROSS THE HIGHER TERRAIN AREAS OF THE EASTERN
DISTRICTS, WITH SLIGHTLY LOWER CHANCES IN THE LOWER ELEVATIONS.
THE BEST CHANCES WILL FALL DURING THE LATTER HALF OF WEDNESDAY.
AFTERNOON MINRHS WILL RANGE BETWEEN 25-40% THROUGH WEDNESDAY WITH
GOOD TO EXCELLENT OVERNIGHT RECOVERIES. ASIDE FROM GUSTY AND
ERRATIC WINDS NEAR THUNDERSTORMS, THE OVERALL WIND PATTERN WILL
FOLLOW THE DIURNAL TRENDS WITH MODEST AFTERNOON UPSLOPE GUSTS.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-111945-
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-
1242 AM MST TUE AUG 11 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................100-106.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................24-30 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............EAST 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...............8 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......9000 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 13 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MIN TEMPERATURE.................78-88.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................53-65 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT WEST PORTION...10
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............15 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MAX TEMPERATURE.................96-104.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................27-34 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 5 TO 15 MPH.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............10 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......7900 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 5 KNOTS.
* DISPERSION FOR PHOENIX..........MARGINAL.
EXTENDED
THURSDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 75-85. HIGHS 95-103. SOUTH WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 75-85. HIGHS 97-104. SOUTH WINDS
5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 77-87. HIGHS 99-106. SOUTH WINDS
5 TO 10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 79-89. HIGHS 102-108.
MONDAY
MOSTLY CLEAR. LOWS 81-91. HIGHS 104-110.
AZZ131-CAZ231-111945-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
1242 AM MST TUE AUG 11 2026 /1242 AM PDT TUE AUG 11 2026/
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................103-108.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................25-29 PCT.
* 24 HR TREND..................LITTLE 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.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............5 PERCENT.
* MIXING HEIGHT FOR YUMA..........7400 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 13 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................80-85.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................55-67 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............5 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................101-106.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................27-31 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
20 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............15 PERCENT.
* MIXING HEIGHT FOR YUMA..........8200 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 13 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
EXTENDED
THURSDAY
PARTLY CLOUDY. LOWS 78-83. HIGHS 99-104. SOUTH WINDS
10 TO 20 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 77-82. HIGHS 99-104. SOUTH WINDS
5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 78-83. HIGHS 102-107. SOUTH WINDS
5 TO 15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 80-85. HIGHS 104-109.
MONDAY
MOSTLY CLEAR. LOWS 80-85. HIGHS 105-110.
AZZ133-111945-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
1242 AM MST TUE AUG 11 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................87-101.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................28-40 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE MORNING
BECOMING NORTHWEST 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
20 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............24 PERCENT.
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. CHANCE OF SHOWERS
IN THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS . SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.................63-78.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................65-87 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 10 MPH IN THE
EVENING BECOMING SOUTHWEST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............NORTHWEST 10 TO 15 MPH.
* CHANCE OF PRECIP................30 PERCENT.
* CWR (>= 0.10 IN)................20 PERCENT.
* CHANCE OF THUNDER...............28 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE MORNING BECOMING CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................83-97.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................33-48 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE MORNING
BECOMING WEST 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................40 PERCENT.
* CWR (>= 0.10 IN)................20 PERCENT.
* CHANCE OF THUNDER...............41 PERCENT.
EXTENDED
THURSDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 61-76. HIGHS 79-95. SOUTHWEST WINDS
5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 61-78. HIGHS 82-96. SOUTHWEST WINDS 5 TO
15 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 62-80. HIGHS 85-100. EAST WINDS
5 TO 15 MPH.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 64-81. HIGHS 88-103.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 65-82. HIGHS 89-104.
CAZ232-111945-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
1242 AM PDT TUE AUG 11 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................98-108.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................23-32 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.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............7 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................80-86.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................46-65 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............6 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................97-107.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................22-30 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...............11 PERCENT.
EXTENDED
THURSDAY
PARTLY CLOUDY. LOWS 76-84. HIGHS 94-104. SOUTHWEST
WINDS 10 TO 20 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 76-83. HIGHS 95-104. SOUTHWEST
WINDS 5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 77-84. HIGHS 96-106. SOUTH WINDS
5 TO 15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 79-85. HIGHS 98-108.
MONDAY
MOSTLY CLEAR. LOWS 79-85. HIGHS 100-110.
CAZ230-111945-
JOSHUA TREE NATIONAL PARK-
1242 AM PDT TUE AUG 11 2026
TODAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................89-102.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................25-34 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 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...............12 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................69-83.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................46-59 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............4 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................87-101.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................23-32 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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...............4 PERCENT.
EXTENDED
THURSDAY
PARTLY CLOUDY. LOWS 63-81. HIGHS 84-98. SOUTHWEST
WINDS 10 TO 20 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 63-79. HIGHS 84-98. SOUTHWEST WINDS
10 TO 20 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 65-80. HIGHS 86-100. SOUTHWEST
WINDS 5 TO 15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 67-81. HIGHS 88-102.
MONDAY
MOSTLY CLEAR. LOWS 68-81. HIGHS 89-104.
8 TO 10 DAY OUTLOOK
TUESDAY AUGUST 18TH THROUGH THURSDAY AUGUST 20TH:
ABOVE NORMAL TEMPERATURES AND ABOVE MEDIAN PRECIPITATION.
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