871
FNUS55 KPSR 092042
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
142 PM MST SUN AUG 9 2026
DISCUSSION
SCATTERED SHOWERS AND THUNDERSTORMS ARE ANTICIPATED ACROSS THE
HIGHER TERRAIN AREAS OF THE EASTERN DISTRICTS, WITH A 15-25%
CHANCE OF ACTIVITY REACHING THE LOWER ELEVATIONS THIS EVENING.
STORM COVERAGE WILL BECOME MORE WIDESPREAD LATE MONDAY AFTERNOON
AND EVENING, RESULTING IN A MUCH BETTER CHANCE FOR WETTING
RAINFALL ACROSS SOUTHCENTRAL AZ. AFTERNOON MINRHS WILL RANGE
BETWEEN 20-25% TODAY AND INCREASE CLOSER TO 25-30% ON MONDAY 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.
AZZ132-100845-
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-
142 PM MST SUN AUG 9 2026
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. PATCHY BLOWING
DUST IN THE EVENING. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS .
* MIN TEMPERATURE.................82-92.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................50-61 PCT.
* 24 HR TREND..................7 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............EAST 10 TO 15 MPH.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............11 PERCENT.
MONDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................102-108.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................23-29 PCT.
* 24 HR TREND..................5 PCT WETTER.
* 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...............6 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......10200 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 12 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
MONDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. PATCHY BLOWING
DUST IN THE EVENING. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
EVENING. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER
MIDNIGHT.
* MIN TEMPERATURE.................78-88.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................55-69 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 10 TO 20 MPH IN THE
EVENING BECOMING SOUTHEAST 5 TO 15 MPH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............NORTHWEST 5 TO 15 MPH IN THE
EVENING BECOMING NORTHEAST AFTER MIDNIGHT.
* CHANCE OF PRECIP................40 PERCENT.
* CWR (>= 0.10 IN)................20 PERCENT WEST PORTION...30
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............33 PERCENT.
TUESDAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
SHOWERS . SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................98-104.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................28-34 PCT.
* 24 HR TREND..................5 PCT WETTER.
* 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.
* CHANCE OF THUNDER...............9 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......10900 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 10 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
EXTENDED
WEDNESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 76-86. HIGHS 96-104. SOUTH WINDS
5 TO 15 MPH.
THURSDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 76-86. HIGHS 96-104. SOUTH WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 76-86. HIGHS 98-105. SOUTH WINDS
5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 78-88. HIGHS 100-107.
SUNDAY
MOSTLY CLEAR. LOWS 79-89. HIGHS 102-108.
AZZ131-CAZ231-100845-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
142 PM MST SUN AUG 9 2026 /142 PM PDT SUN AUG 9 2026/
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................82-87.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................55-68 PCT.
* 24 HR TREND..................10 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 10 TO 20 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............4 PERCENT.
MONDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................104-109.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................25-29 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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...............6 PERCENT.
* MIXING HEIGHT FOR YUMA..........7400 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 13 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
MONDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MIN TEMPERATURE.................81-86.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................53-63 PCT.
* 24 HR TREND..................4 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 10 TO 20 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE EVENING
BECOMING SOUTHEAST 5 TO 15 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............9 PERCENT.
TUESDAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
SHOWERS . SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................101-106.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................28-32 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 10 TO 15 MPH.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............8 PERCENT.
* MIXING HEIGHT FOR YUMA..........8600 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 9 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
EXTENDED
WEDNESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 79-84. HIGHS 101-106. SOUTH WINDS 10 TO
20 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 78-83. HIGHS 100-105. SOUTH WINDS
10 TO 20 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 78-83. HIGHS 101-106. SOUTH WINDS
5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 79-84. HIGHS 102-107.
SUNDAY
MOSTLY CLEAR. LOWS 80-85. HIGHS 104-109.
AZZ133-100845-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
142 PM MST SUN AUG 9 2026
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS .
* MIN TEMPERATURE.................66-82.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................52-68 PCT.
* 24 HR TREND..................8 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 10 TO 15 MPH.
* CHANCE OF PRECIP................30 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............30 PERCENT.
MONDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................90-104.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................24-34 PCT.
* 24 HR TREND..................9 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 5 TO 15 MPH IN THE
MORNING BECOMING LIGHT AND VARIABLE IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
30 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............28 PERCENT.
MONDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE EVENING.
* MIN TEMPERATURE.................63-79.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................67-87 PCT.
* 24 HR TREND..................17 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 10 TO 20 MPH IN THE EVENING
BECOMING NORTH 15 TO 25 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................50 PERCENT IN THE EVENING
BECOMING 10 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................30 PERCENT.
* CHANCE OF THUNDER...............39 PERCENT.
TUESDAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................86-100.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................31-44 PCT.
* 24 HR TREND..................8 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 5 TO 15 MPH IN THE
MORNING BECOMING NORTHWEST 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.
EXTENDED
WEDNESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 62-78. HIGHS 83-97. SOUTHWEST WINDS 5 TO
15 MPH.
THURSDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 61-76. HIGHS 79-94. SOUTHWEST WINDS
5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 61-79. HIGHS 83-98. WEST WINDS 5 TO
15 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 63-80. HIGHS 86-101.
SUNDAY
PARTLY CLOUDY. LOWS 64-81. HIGHS 88-103.
CAZ232-100845-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
142 PM PDT SUN AUG 9 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................82-88.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................49-82 PCT.
* 24 HR TREND..................13 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE EVENING
BECOMING SOUTHEAST 10 TO 20 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
MONDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................100-109.
* 24 HR TREND..................3 DEGREES COOLER.
* 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 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............4 PERCENT.
MONDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................81-87.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................50-75 PCT.
* 24 HR TREND..................3 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................0 PERCENT IN THE EVENING BECOMING
20 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............10 PERCENT.
TUESDAY
* SKY/WEATHER.....................PARTLY SUNNY. CHANCE OF SHOWERS
IN THE MORNING BECOMING SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................97-106.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................26-35 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 15 MPH.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............12 PERCENT.
EXTENDED
WEDNESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 78-85. HIGHS 97-107. SOUTH WINDS 10 TO
20 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 76-84. HIGHS 96-106. SOUTHWEST
WINDS 10 TO 20 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 76-84. HIGHS 96-105. SOUTH WINDS
5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 78-84. HIGHS 97-107.
SUNDAY
MOSTLY CLEAR. LOWS 79-85. HIGHS 98-108.
CAZ230-100845-
JOSHUA TREE NATIONAL PARK-
142 PM PDT SUN AUG 9 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................73-86.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................45-60 PCT.
* 24 HR TREND..................15 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE EVENING
BECOMING SOUTHEAST 10 TO 20 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
MONDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................91-104.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................21-29 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................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
MONDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................71-85.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................47-63 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 IN THE EVENING BECOMING
20 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............11 PERCENT.
TUESDAY
* SKY/WEATHER.....................PARTLY SUNNY. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS.
* MAX TEMPERATURE.................88-101.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................27-36 PCT.
* 24 HR TREND..................6 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................40 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............21 PERCENT.
EXTENDED
WEDNESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 66-82. HIGHS 87-101. SOUTHWEST WINDS 5 TO
15 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 65-81. HIGHS 86-100. SOUTHWEST
WINDS 5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 65-80. HIGHS 86-100. SOUTHWEST WINDS
5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 66-81. HIGHS 87-101.
SUNDAY
PARTLY CLOUDY. LOWS 67-81. HIGHS 88-102.
8 TO 10 DAY OUTLOOK
MONDAY AUGUST 17TH THROUGH WEDNESDAY AUGUST
19TH: ABOVE NORMAL TEMPERATURES AND ABOVE MEDIAN PRECIPITATION.
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