200
FNUS55 KPSR 102109
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
209 PM MST MON AUG 10 2026
DISCUSSION
SCATTERED SHOWERS AND THUNDERSTORMS ARE ANTICIPATED EACH DAY
THROUGH MIDWEEK ACROSS THE HIGHER TERRAIN AREAS OF THE EASTERN
DISTRICTS, WITH A 30-50% CHANCE OF ACTIVITY IN THE LOWER
ELEVATIONS. WITH THESE THUNDERSTORMS WILL COME AN ELEVATED
POTENTIAL FOR WETTING RAINS. AFTERNOON MINRHS WILL RANGE BETWEEN
20-30% TODAY AND INCREASE TO 25-40% ON TUESDAY ALONG 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.
AZZ132-110915-
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-
209 PM MST MON AUG 10 2026
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. CHANCE OF SHOWERS
IN THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS . SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.................79-89.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................53-64 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............EAST 10 TO 15 MPH.
* CHANCE OF PRECIP................30 PERCENT.
* CWR (>= 0.10 IN)................10 PERCENT WEST PORTION...20
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............27 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................99-106.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................25-30 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................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............8 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......8600 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 12 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
TUESDAY NIGHT
* 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...............13 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................PARTLY SUNNY. CHANCE OF SHOWERS
IN THE MORNING. SLIGHT CHANCE OF THUNDERSTORMS . SLIGHT CHANCE OF
SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.................95-103.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................27-35 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 5 TO 15 MPH.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............13 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......10100 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 8 KNOTS.
* DISPERSION FOR PHOENIX..........VERY GOOD.
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 76-86. HIGHS 100-107. SOUTH WINDS
5 TO 10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 78-88. HIGHS 102-108.
MONDAY
MOSTLY CLEAR. LOWS 80-90. HIGHS 103-109.
AZZ131-CAZ231-110915-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
209 PM MST MON AUG 10 2026 /209 PM PDT MON AUG 10 2026/
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................81-86.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................53-63 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT IN THE EVENING BECOMING
10 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............10 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................103-108.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................24-28 PCT.
* 24 HR TREND..................LITTLE 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.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............7 PERCENT.
* MIXING HEIGHT FOR YUMA..........9300 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 10 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................80-85.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................53-63 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...............6 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....................26-30 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 IN THE MORNING BECOMING
10 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............14 PERCENT.
* MIXING HEIGHT FOR YUMA..........8100 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 12 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
EXTENDED
THURSDAY
PARTLY CLOUDY. LOWS 78-83. HIGHS 99-104. SOUTH WINDS
10 TO 20 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 77-82. HIGHS 100-105. SOUTH WINDS
5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 77-82. HIGHS 102-107. SOUTH WINDS
5 TO 15 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 79-84. HIGHS 104-109.
MONDAY
MOSTLY CLEAR. LOWS 80-85. HIGHS 105-110.
AZZ133-110915-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
209 PM MST MON AUG 10 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY IN THE EVENING
BECOMING PARTLY CLOUDY AFTER MIDNIGHT. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING BECOMING SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................64-80.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................62-84 PCT.
* 24 HR TREND..................10 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 10 TO 20 MPH.
* CHANCE OF PRECIP................40 PERCENT.
* CWR (>= 0.10 IN)................30 PERCENT.
* CHANCE OF THUNDER...............35 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................86-101.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................29-41 PCT.
* 24 HR TREND..................7 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
30 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............25 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MIN TEMPERATURE.................63-78.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................64-90 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE EVENING
BECOMING SOUTHEAST 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...............21 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
THUNDERSTORMS IN THE MORNING. CHANCE OF SHOWERS . CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................82-96.
* 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)................0 PERCENT.
* CHANCE OF THUNDER...............36 PERCENT.
EXTENDED
THURSDAY
SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS.
LOWS 61-76. HIGHS 79-94. SOUTHWEST WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 61-77. HIGHS 83-97. SOUTHWEST WINDS 5 TO
15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 61-79. HIGHS 86-101. WEST WINDS
5 TO 15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 63-81. HIGHS 88-103.
MONDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 65-82. HIGHS 89-104.
CAZ232-110915-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
209 PM PDT MON AUG 10 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................81-87.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................50-74 PCT.
* 24 HR TREND..................4 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE EVENING
BECOMING SOUTHEAST 5 TO 15 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............6 PERCENT.
TUESDAY
* 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............SOUTHEAST 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...............7 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................79-85.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................47-65 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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...............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............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...............8 PERCENT.
EXTENDED
THURSDAY
PARTLY CLOUDY. LOWS 76-83. HIGHS 95-105. SOUTHWEST
WINDS 10 TO 20 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 76-82. HIGHS 95-104. SOUTHWEST
WINDS 5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 76-83. HIGHS 96-106. SOUTHWEST
WINDS 5 TO 15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 78-84. HIGHS 98-108.
MONDAY
MOSTLY CLEAR. LOWS 78-84. HIGHS 99-109.
CAZ230-110915-
JOSHUA TREE NATIONAL PARK-
209 PM PDT MON AUG 10 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................71-84.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................50-66 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* 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...............6 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS . SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................88-102.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................25-34 PCT.
* 24 HR TREND..................3 PCT WETTER.
* 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................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............10 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................68-82.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................45-58 PCT.
* 24 HR TREND..................5 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...............6 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................87-100.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................23-32 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* 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...............2 PERCENT.
EXTENDED
THURSDAY
PARTLY CLOUDY. LOWS 64-80. HIGHS 84-99. SOUTHWEST
WINDS 10 TO 20 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 64-78. HIGHS 85-99. SOUTHWEST WINDS
5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 64-79. HIGHS 86-100. SOUTHWEST
WINDS 5 TO 15 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 66-80. HIGHS 88-102.
MONDAY
MOSTLY CLEAR. LOWS 66-80. HIGHS 89-103.
8 TO 10 DAY OUTLOOK
TUESDAY AUGUST 18TH THROUGH THURSDAY AUGUST 20TH:
ABOVE NORMAL TEMPERATURES AND ABOVE MEDIAN PRECIPITATION.
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