801
FNUS55 KPSR 041913
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
1213 PM MST FRI SEP 4 2026
DISCUSSION
RESIDUAL MOISTURE MAY HELP SPARK A FEW SHOWERS AND STORMS THIS
AFTERNOON, MAINLY SOUTH AND EAST OF PHOENIX, WITH A LESS THAN 10%
CHANCE OF WETTING RAINS. AFTERNOON MINIMUM HUMIDITIES WILL RANGE
FROM 7-15% ACROSS SOUTHEAST CA AND BETWEEN 20-35% FOR THE
REMAINDER OF THE REGION TODAY AND WILL LIKELY INCREASE ABOVE 20-25%
AREAWIDE THIS WEEKEND. OVERNIGHT RECOVERIES WILL RANGE FROM POOR
ACROSS THE WESTERN DESERTS AND GOOD ACROSS THE EASTERN DISTRICTS
TONIGHT BEFORE INCREASING TO GOOD AREAWIDE THIS WEEKEND. WINDS
WILL REMAIN ELEVATED OUT OF THE SOUTH TO SOUTHWEST, WITH THE
STRONGEST GUSTS IN SOUTHEAST CA AND ALONG THE LOWER COLORADO RIVER
VALLEY PEAKING BETWEEN 20-30 MPH THIS AFTERNOON/EARLY EVENING WITH
SLIGHTLY LIGHTER WINDS EXPECTED DURING THE UPCOMING WEEKEND.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-050715-
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-
1213 PM MST FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................75-85.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................41-56 PCT.
* 24 HR TREND..................17 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
SATURDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................93-101.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................25-30 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 10 MPH IN THE
MORNING BECOMING SOUTHWEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 15 TO 25 MPH 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...............5 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......9900 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 7 KNOTS.
* DISPERSION FOR PHOENIX..........VERY GOOD.
SATURDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................77-87.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................44-52 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 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...............4 PERCENT.
SUNDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................95-104.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................23-30 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 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...............1 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......10000 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 11 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
EXTENDED
MONDAY
MOSTLY CLEAR. LOWS 78-88. HIGHS 97-106. NORTHWEST WINDS
5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 79-89. HIGHS 101-108. WEST WINDS
5 TO 15 MPH.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 78-88. HIGHS 98-104. SOUTHWEST WINDS 5 TO
10 MPH.
THURSDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 76-86. HIGHS 95-101.
FRIDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 74-84. HIGHS 92-100.
AZZ131-CAZ231-050715-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
1213 PM MST FRI SEP 4 2026 /1213 PM PDT FRI SEP 4 2026/
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................75-81.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................36-50 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 10 MPH IN THE
EVENING BECOMING SOUTHEAST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
SATURDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................96-101.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................25-29 PCT.
* 24 HR TREND..................14 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHEAST 5 TO 10 MPH IN THE
MORNING BECOMING WEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............7 PERCENT.
* MIXING HEIGHT FOR YUMA..........4000 FT AGL.
* TRANSPORT WIND FOR YUMA.........NORTHWEST 18 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
SATURDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................79-84.
* 24 HR TREND..................4 DEGREES WARMER.
* MAX HUMIDITY....................46-54 PCT.
* 24 HR TREND..................8 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
SUNDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................97-104.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................26-33 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
* MIXING HEIGHT FOR YUMA..........7900 FT AGL.
* TRANSPORT WIND FOR YUMA.........NORTHWEST 13 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
EXTENDED
MONDAY
PARTLY CLOUDY. LOWS 78-86. HIGHS 101-107. NORTHWEST
WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 81-86. HIGHS 103-108. WEST WINDS
5 TO 15 MPH.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 81-86. HIGHS 100-105. SOUTH WINDS 5 TO
15 MPH.
THURSDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 79-85. HIGHS 98-103.
FRIDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 77-83. HIGHS 97-102.
AZZ133-050715-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
1213 PM MST FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................60-77.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................48-75 PCT.
* 24 HR TREND..................22 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...............3 PERCENT.
SATURDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................83-97.
* 24 HR TREND..................4 DEGREES WARMER.
* MIN HUMIDITY....................23-34 PCT.
* 24 HR TREND..................7 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 10 MPH IN THE MORNING
BECOMING WEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHWEST 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...............2 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................62-79.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................44-67 PCT.
* 24 HR TREND..................7 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 10 MPH IN THE
EVENING BECOMING NORTH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE EVENING
BECOMING SOUTH 5 TO 15 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SUNDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................86-100.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................21-31 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 10 MPH IN THE MORNING
BECOMING WEST 5 TO 15 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHWEST 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
EXTENDED
MONDAY
MOSTLY CLEAR. LOWS 65-81. HIGHS 86-101. WEST WINDS 5 TO
15 MPH.
TUESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 65-82. HIGHS 87-103. SOUTHEAST WINDS 5 TO
15 MPH.
WEDNESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 64-82. HIGHS 86-101. SOUTHEAST WINDS 5 TO
15 MPH.
THURSDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 63-79. HIGHS 82-96.
FRIDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 61-77. HIGHS 79-93.
CAZ232-050715-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
1213 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................72-80.
* 24 HR TREND..................4 DEGREES WARMER.
* MAX HUMIDITY....................27-43 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SATURDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................91-100.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................19-28 PCT.
* 24 HR TREND..................11 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............5 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................78-85.
* 24 HR TREND..................6 DEGREES WARMER.
* MAX HUMIDITY....................40-63 PCT.
* 24 HR TREND..................16 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............4 PERCENT.
SUNDAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.................90-100.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................29-41 PCT.
* 24 HR TREND..................11 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............6 PERCENT.
EXTENDED
MONDAY
PARTLY CLOUDY. LOWS 76-85. HIGHS 95-105. NORTHWEST
WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 78-86. HIGHS 98-108. WEST WINDS
5 TO 15 MPH.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 79-86. HIGHS 96-106. SOUTH WINDS 5 TO 15 MPH.
THURSDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 77-85. HIGHS 94-103.
FRIDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 74-83. HIGHS 93-103.
CAZ230-050715-
JOSHUA TREE NATIONAL PARK-
1213 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................62-72.
* 24 HR TREND..................3 DEGREES WARMER.
* MAX HUMIDITY....................32-40 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SATURDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................81-95.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................21-26 PCT.
* 24 HR TREND..................7 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 25 TO 35 MPH IN THE
MORNING BECOMING 15 TO 25 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............4 PERCENT.
SATURDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. CHANCE OF SHOWERS
AFTER MIDNIGHT.
* MIN TEMPERATURE.................67-79.
* 24 HR TREND..................6 DEGREES WARMER.
* MAX HUMIDITY....................45-70 PCT.
* 24 HR TREND..................21 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT IN THE EVENING BECOMING
40 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............7 PERCENT.
SUNDAY
* SKY/WEATHER.....................MOSTLY CLOUDY. CHANCE OF SHOWERS
. SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................75-89.
* 24 HR TREND..................6 DEGREES COOLER.
* MIN HUMIDITY....................38-53 PCT.
* 24 HR TREND..................21 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 25 TO 35 MPH.
* CHANCE OF PRECIP................40 PERCENT.
* CWR (>= 0.10 IN)................20 PERCENT.
* CHANCE OF THUNDER...............11 PERCENT.
EXTENDED
MONDAY
PARTLY CLOUDY. LOWS 66-79. HIGHS 83-97. WEST WINDS 5 TO
15 MPH.
TUESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS. LOWS
67-81. HIGHS 86-100. WEST WINDS 5 TO 15 MPH.
WEDNESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 68-81. HIGHS 85-100. SOUTHWEST WINDS 5 TO
15 MPH.
THURSDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 66-81. HIGHS 84-98.
FRIDAY
MOSTLY CLEAR. LOWS 63-79. HIGHS 82-97.
8 TO 10 DAY OUTLOOK
SATURDAY SEPTEMBER 12TH THROUGH MONDAY
SEPTEMBER 14TH: NEAR NORMAL TEMPERATURES AND ABOVE MEDIAN
PRECIPITATION.
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