152
FNUS55 KPSR 022023
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
123 PM MST WED SEP 2 2026
DISCUSSION
DRIER CONDITIONS WILL PREVAIL THROUGH THURSDAY WITH ONLY SLIGHT
CHANCES FOR ISOLATED SHOWERS AND THUNDERSTORMS ACROSS THE EASTERN
DISTRICTS. SLIGHTLY BETTER CHANCES FOR WETTING RAINS RETURN TO
THE REGION FRIDAY INTO THIS WEEKEND. AFTERNOON MINIMUM HUMIDITIES
WILL RANGE FROM 7-15% ACROSS SOUTHEAST CA AND BETWEEN 15-35% FOR
MUCH OF SOUTHERN AZ OVER THE NEXT FEW DAYS. OVERNIGHT RECOVERIES
WILL RANGE FROM POOR ACROSS THE WESTERN DESERTS AND GOOD TO
EXCELLENT ACROSS THE EASTERN DISTRICTS. DAYTIME 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 DURING THE AFTERNOON/EARLY EVENING.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-030830-
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-
123 PM MST WED SEP 2 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................75-85.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................29-71 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................96-104.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................22-31 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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.
* MIXING HEIGHT FOR PHOENIX.......11000 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 11 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
THURSDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MIN TEMPERATURE.................75-85.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................50-69 PCT.
* 24 HR TREND..................7 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
FRIDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................96-104.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................22-31 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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.
* MIXING HEIGHT FOR PHOENIX.......11800 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 14 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
EXTENDED
SATURDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 76-86. HIGHS 93-101. SOUTHWEST WINDS 5 TO
15 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 76-86. HIGHS 96-104. WEST WINDS
5 TO 15 MPH.
MONDAY
PARTLY CLOUDY. LOWS 77-87. HIGHS 97-105. WEST WINDS
5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 77-87. HIGHS 97-105.
WEDNESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 77-87. HIGHS 97-104.
AZZ131-CAZ231-030830-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
123 PM MST WED SEP 2 2026 /123 PM PDT WED SEP 2 2026/
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................74-80.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................24-40 PCT.
* 24 HR TREND..................6 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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.
THURSDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................99-104.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................12-25 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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.
* MIXING HEIGHT FOR YUMA..........10300 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 12 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
THURSDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................75-80.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................38-50 PCT.
* 24 HR TREND..................14 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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...............1 PERCENT.
FRIDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................99-104.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................16-21 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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...............3 PERCENT.
* MIXING HEIGHT FOR YUMA..........9100 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTHWEST 11 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
EXTENDED
SATURDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 77-83. HIGHS 94-100. SOUTHWEST
WINDS 5 TO 15 MPH.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 77-84. HIGHS 97-102. NORTHWEST WINDS 5 TO
15 MPH.
MONDAY
PARTLY CLOUDY. LOWS 77-84. HIGHS 99-104. NORTHWEST
WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 77-83. HIGHS 99-104.
WEDNESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS. LOWS
78-83. HIGHS 100-105.
AZZ133-030830-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
123 PM MST WED SEP 2 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................62-77.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................58-78 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................84-99.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................27-40 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 MPH.
* 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.
THURSDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS IN THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS . CHANCE
OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.................62-77.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................62-87 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF PRECIP................50 PERCENT.
* CWR (>= 0.10 IN)................30 PERCENT.
* CHANCE OF THUNDER...............22 PERCENT.
FRIDAY
* SKY/WEATHER.....................PARTLY SUNNY. CHANCE OF SHOWERS
IN THE MORNING. SLIGHT CHANCE OF THUNDERSTORMS . SLIGHT CHANCE OF
SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.................81-97.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................29-46 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE MORNING
BECOMING SOUTHWEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF PRECIP................50 PERCENT.
* CWR (>= 0.10 IN)................20 PERCENT.
* CHANCE OF THUNDER...............14 PERCENT.
EXTENDED
SATURDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS
63-79. HIGHS 84-98. WEST WINDS 5 TO 15 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 64-80. HIGHS 86-101. WEST WINDS
5 TO 15 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 64-80. HIGHS 86-100. WEST WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 64-79. HIGHS 85-100.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 63-79. HIGHS 85-100.
CAZ232-030830-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
123 PM PDT WED SEP 2 2026
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................69-76.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................22-34 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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.
THURSDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................92-103.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................7-15 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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.
THURSDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................70-76.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................28-47 PCT.
* 24 HR TREND..................10 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...............0 PERCENT.
FRIDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................93-104.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................11-18 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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.
EXTENDED
SATURDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 75-81. HIGHS 88-97. WEST WINDS 5 TO
15 MPH.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 76-83. HIGHS 90-99. NORTHWEST WINDS 5 TO
15 MPH.
MONDAY
PARTLY CLOUDY. LOWS 76-83. HIGHS 92-102. NORTHWEST
WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 76-83. HIGHS 94-103.
WEDNESDAY
MOSTLY CLEAR. LOWS 78-84. HIGHS 95-104.
CAZ230-030830-
JOSHUA TREE NATIONAL PARK-
123 PM PDT WED SEP 2 2026
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................58-70.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX 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...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................81-96.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................8-15 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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...............0 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................58-71.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................31-42 PCT.
* 24 HR TREND..................11 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...............0 PERCENT.
FRIDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................81-97.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................11-19 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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...............0 PERCENT.
EXTENDED
SATURDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS. LOWS 61-77.
HIGHS 78-92. SOUTHWEST WINDS 5 TO 15 MPH.
SUNDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 64-78. HIGHS 76-91. WEST WINDS 5 TO
15 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 64-78. HIGHS 79-94. WEST WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 64-79. HIGHS 82-96.
WEDNESDAY
MOSTLY CLEAR. LOWS 65-80. HIGHS 83-97.
8 TO 10 DAY OUTLOOK
THURSDAY SEPTEMBER 10TH THROUGH SATURDAY
SEPTEMBER 12TH: NEAR NORMAL TEMPERATURES AND ABOVE MEDIAN
PRECIPITATION.
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