589
FNUS55 KPSR 110704
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
1204 AM MST FRI SEP 11 2026
DISCUSSION
ISOLATED CHANCES FOR SHOWERS AND A FEW THUNDERSTORMS CAN BE
EXPECTED THROUGH THE WEEKEND, WITH THE BEST CHANCES OVER THE
ARIZONA HIGH TERRAIN. MINRHS THROUGH EARLY NEXT WEEK WILL
GENERALLY BE BETWEEN 15-25% ACROSS THE WESTERN DISTRICTS AND
25-35% ACROSS THE EASTERN DISTRICTS. WINDS WILL SOMEWHAT FOLLOW
TYPICAL DIURNAL PATTERNS, BUT WITH MORE OF A SOUTH SOUTHWESTERLY
PREDOMINANT WIND ACROSS THE WESTERN DISTRICTS. DAILY AFTERNOON
GUSTS OF 20-25 MPH WILL BE COMMON ACROSS THE LOWER CO RIVER VALLEY
THROUGH THE WEEKEND BEFORE BECOMING MORE WIDESPREAD EARLY NEXT
WEEK.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-111915-
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-
1204 AM MST FRI SEP 11 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................100-106.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................25-31 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............4 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......8400 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 10 KNOTS.
* DISPERSION FOR PHOENIX..........VERY GOOD.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................77-87.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................58-71 PCT.
* 24 HR TREND..................9 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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...............5 PERCENT.
SATURDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................97-104.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................28-34 PCT.
* 24 HR TREND..................3 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 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......9600 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 5 KNOTS.
* DISPERSION FOR PHOENIX..........GOOD.
EXTENDED
SUNDAY
MOSTLY CLEAR. LOWS 77-87. HIGHS 98-105. SOUTH WINDS
5 TO 15 MPH.
MONDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 74-84. HIGHS 98-105. SOUTH WINDS 10 TO
20 MPH.
TUESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 74-84. HIGHS 95-103. SOUTH WINDS 10 TO
20 MPH.
WEDNESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 74-84. HIGHS 94-103.
THURSDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 75-85. HIGHS 96-104.
AZZ131-CAZ231-111915-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
1204 AM MST FRI SEP 11 2026 /1204 AM PDT FRI SEP 11 2026/
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................103-108.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................26-32 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 10 TO 20 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
* MIXING HEIGHT FOR YUMA..........5600 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 14 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................78-83.
* 24 HR TREND..................4 DEGREES COOLER.
* MAX HUMIDITY....................63-77 PCT.
* 24 HR TREND..................11 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 10 TO 20 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.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................101-106.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................30-35 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 10 TO 20 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........6100 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 14 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
EXTENDED
SUNDAY
CLEAR. LOWS 76-81. HIGHS 101-106. SOUTH WINDS 10 TO
20 MPH.
MONDAY
CLEAR. LOWS 75-81. HIGHS 101-106. SOUTH WINDS 10 TO
20 MPH.
TUESDAY
CLEAR. LOWS 74-79. HIGHS 99-104. SOUTH WINDS 15 TO
25 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 74-80. HIGHS 99-104.
THURSDAY
MOSTLY CLEAR. LOWS 76-82. HIGHS 100-105.
AZZ133-111915-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
1204 AM MST FRI SEP 11 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................86-100.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................25-36 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 10 TO 15 MPH.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............9 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MIN TEMPERATURE.................63-80.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................62-84 PCT.
* 24 HR TREND..................9 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 5 TO 15 MPH IN THE
EVENING BECOMING LIGHT AND VARIABLE AFTER MIDNIGHT.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............13 PERCENT.
SATURDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................85-99.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................28-39 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............7 PERCENT.
EXTENDED
SUNDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 63-80. HIGHS 84-99. SOUTH WINDS 5 TO 15 MPH.
MONDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 61-80. HIGHS 82-98. SOUTH WINDS 5 TO 15 MPH.
TUESDAY
SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS.
LOWS 61-76. HIGHS 79-94. SOUTH WINDS 5 TO 15 MPH.
WEDNESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 60-76. HIGHS 79-94.
THURSDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 60-77. HIGHS 80-95.
CAZ232-111915-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
1204 AM PDT FRI SEP 11 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................100-111.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................19-29 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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...............3 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................78-85.
* 24 HR TREND..................4 DEGREES COOLER.
* MAX HUMIDITY....................51-80 PCT.
* 24 HR TREND..................19 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................97-107.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................20-33 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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.
EXTENDED
SUNDAY
CLEAR. LOWS 75-82. HIGHS 96-106. SOUTH WINDS 10 TO
20 MPH.
MONDAY
CLEAR. LOWS 72-81. HIGHS 95-105. SOUTH WINDS 5 TO
15 MPH.
TUESDAY
CLEAR. LOWS 72-78. HIGHS 94-104. SOUTH WINDS 10 TO
20 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 72-80. HIGHS 93-103.
THURSDAY
MOSTLY CLEAR. LOWS 74-82. HIGHS 94-103.
CAZ230-111915-
JOSHUA TREE NATIONAL PARK-
1204 AM PDT FRI SEP 11 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................89-104.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................20-28 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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...............2 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................69-82.
* 24 HR TREND..................4 DEGREES COOLER.
* MAX HUMIDITY....................47-60 PCT.
* 24 HR TREND..................7 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* 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...............2 PERCENT.
SATURDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................87-100.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................22-29 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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.
EXTENDED
SUNDAY
CLEAR. LOWS 65-77. HIGHS 84-99. SOUTHWEST WINDS 5 TO
15 MPH.
MONDAY
CLEAR. LOWS 64-76. HIGHS 83-97. SOUTHWEST WINDS 5 TO
15 MPH.
TUESDAY
CLEAR. LOWS 63-73. HIGHS 81-96. SOUTHWEST WINDS 10 TO
20 MPH.
WEDNESDAY
CLEAR. LOWS 63-74. HIGHS 81-95.
THURSDAY
MOSTLY CLEAR. LOWS 64-76. HIGHS 82-96.
8 TO 10 DAY OUTLOOK
FRIDAY SEPTEMBER 18TH THROUGH SUNDAY
SEPTEMBER 20TH: NEAR TO ABOVE NORMAL TEMPERATURES AND NEAR MEDIAN
PRECIPITATION.
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