726
FNUS55 KPSR 151926
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
1226 PM MST TUE SEP 15 2026
DISCUSSION
PERIODS OF SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED
THROUGH WEDNESDAY ACROSS THE EASTERN DISTRICTS SUPPORTING A
HEAVY RAINFALL AND FLOOD THREAT BEFORE MUCH LOWER RAIN CHANCES
ARRIVE ON THURSDAY. MOISTURE LEVELS WILL REMAIN ELEVATED EXCEPT
FOR SOUTHEAST CALIFORNIA. EXPECT MINIMUM HUMIDITY LEVELS TO STILL
FALL INTO A 15-25% RANGE FOR THE WESTERN DISTRICTS WHILE THE
EASTERN DISTRICTS WILL ONLY DIP TO 35-50% THROUGH THURSDAY. WINDS
WILL FAVOR THE SOUTH TO SOUTHEAST OVER MUCH OF THE AREA WITH
GUSTS OF 20-30 MPH AT TIMES ACROSS SOUTHWEST ARIZONA THROUGH
WEDNESDAY.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-160730-
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-
1226 PM MST TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING. CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................74-84.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................67-78 PCT.
* 24 HR TREND..................7 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 15 TO 25 MPH.
* CHANCE OF PRECIP................30 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT WEST PORTION...30
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............11 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
THUNDERSTORMS IN THE MORNING. CHANCE OF SHOWERS . CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................87-98.
* 24 HR TREND..................6 DEGREES COOLER.
* MIN HUMIDITY....................33-55 PCT.
* 24 HR TREND..................11 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 15 TO 25 MPH.
* CHANCE OF PRECIP................50 PERCENT.
* CWR (>= 0.10 IN)................10 PERCENT WEST PORTION...60
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............31 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......3200 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTH 11 KNOTS.
* DISPERSION FOR PHOENIX..........FAIR.
WEDNESDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING. CHANCE OF SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................72-82.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................68-86 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT WEST PORTION...30
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............24 PERCENT.
THURSDAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE MORNING.
* MAX TEMPERATURE.................91-101.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................25-43 PCT.
* 24 HR TREND..................10 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 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...............2 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......6400 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTH 5 KNOTS.
* DISPERSION FOR PHOENIX..........FAIR.
EXTENDED
FRIDAY
CLEAR. LOWS 73-83. HIGHS 96-104. SOUTH WINDS 5 TO
10 MPH.
SATURDAY
CLEAR. LOWS 73-83. HIGHS 98-105. SOUTHWEST WINDS 5 TO
10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 73-83. HIGHS 97-104. SOUTH WINDS
5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 73-83. HIGHS 95-103.
TUESDAY
MOSTLY CLEAR. LOWS 73-83. HIGHS 95-102.
AZZ131-CAZ231-160730-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
1226 PM MST TUE SEP 15 2026 /1226 PM PDT TUE SEP 15 2026/
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................75-81.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................66-77 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 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.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................97-102.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................27-36 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 10 TO 20 MPH.
* WINDS...10000 FT MSL............SOUTH 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............5 PERCENT.
* MIXING HEIGHT FOR YUMA..........5700 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 18 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................74-79.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................65-75 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 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...............5 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................97-102.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................23-29 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 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.
* MIXING HEIGHT FOR YUMA..........7900 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 8 KNOTS.
* DISPERSION FOR YUMA.............GOOD.
EXTENDED
FRIDAY
CLEAR. LOWS 72-77. HIGHS 99-104. SOUTHWEST WINDS 5 TO
10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
CLEAR. LOWS 72-77. HIGHS 101-106. WEST WINDS 5 TO
10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SUNDAY
MOSTLY CLEAR. LOWS 72-77. HIGHS 100-105. SOUTH WINDS
5 TO 15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 72-77. HIGHS 99-104.
TUESDAY
CLEAR. LOWS 72-78. HIGHS 99-104.
AZZ133-160730-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
1226 PM MST TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING BECOMING CHANCE OF
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................60-75.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................75-97 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE EVENING
BECOMING EAST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH.
* CHANCE OF PRECIP................80 PERCENT.
* CWR (>= 0.10 IN)................60 PERCENT.
* CHANCE OF THUNDER...............40 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY CLOUDY. CHANCE OF SHOWERS
IN THE MORNING. CHANCE OF THUNDERSTORMS . SHOWERS LIKELY IN THE
AFTERNOON.
* MAX TEMPERATURE.................72-86.
* 24 HR TREND..................6 DEGREES COOLER.
* MIN HUMIDITY....................51-73 PCT.
* 24 HR TREND..................17 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH.
* CHANCE OF PRECIP................80 PERCENT.
* CWR (>= 0.10 IN)................90 PERCENT.
* CHANCE OF THUNDER...............43 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. CHANCE OF
THUNDERSTORMS IN THE EVENING. CHANCE OF SHOWERS . SLIGHT CHANCE
OF THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................59-72.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................80-99 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH.
* CHANCE OF PRECIP................70 PERCENT.
* CWR (>= 0.10 IN)................70 PERCENT.
* CHANCE OF THUNDER...............30 PERCENT.
THURSDAY
* SKY/WEATHER.....................PARTLY SUNNY. CHANCE OF SHOWERS
IN THE MORNING. SLIGHT CHANCE OF THUNDERSTORMS . SLIGHT CHANCE OF
SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.................76-90.
* 24 HR TREND..................4 DEGREES WARMER.
* MIN HUMIDITY....................41-59 PCT.
* 24 HR TREND..................11 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 10 MPH IN THE MORNING
BECOMING SOUTH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF PRECIP................30 PERCENT.
* CWR (>= 0.10 IN)................20 PERCENT.
* CHANCE OF THUNDER...............12 PERCENT.
EXTENDED
FRIDAY
MOSTLY CLEAR. LOWS 59-75. HIGHS 80-96. EAST WINDS 5 TO
15 MPH.
SATURDAY
CLEAR. LOWS 58-75. HIGHS 81-97. EAST WINDS 5 TO
15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 57-74. HIGHS 80-97. EAST WINDS 5 TO
10 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 57-74. HIGHS 79-95.
TUESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 57-74. HIGHS 78-95.
CAZ232-160730-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
1226 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................73-79.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................38-75 PCT.
* 24 HR TREND..................7 PCT WETTER.
* 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...............0 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................92-102.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................17-29 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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...............1 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................71-78.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................41-69 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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...............1 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................91-101.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................17-25 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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...............0 PERCENT.
EXTENDED
FRIDAY
CLEAR. LOWS 72-78. HIGHS 94-103. WEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
CLEAR. LOWS 73-79. HIGHS 96-105. NORTHWEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SUNDAY
MOSTLY CLEAR. LOWS 72-79. HIGHS 95-105. SOUTH WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
MONDAY
MOSTLY CLEAR. LOWS 72-78. HIGHS 94-103.
TUESDAY
CLEAR. LOWS 72-79. HIGHS 93-102.
CAZ230-160730-
JOSHUA TREE NATIONAL PARK-
1226 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................62-74.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................34-61 PCT.
* 24 HR TREND..................5 PCT WETTER.
* 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...............0 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................79-94.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................18-24 PCT.
* 24 HR TREND..................3 PCT DRIER.
* 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...............0 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................62-73.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................40-58 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
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................79-94.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................18-25 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* 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...............0 PERCENT.
EXTENDED
FRIDAY
CLEAR. LOWS 63-73. HIGHS 82-96. NORTHWEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
CLEAR. LOWS 64-74. HIGHS 84-97. NORTHWEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SUNDAY
MOSTLY CLEAR. LOWS 64-74. HIGHS 83-97. SOUTHWEST WINDS
5 TO 15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 64-73. HIGHS 82-95.
TUESDAY
CLEAR. LOWS 63-73. HIGHS 81-94.
8 TO 10 DAY OUTLOOK
WEDNESDAY SEPTEMBER 23RD THROUGH FRIDAY
SEPTEMBER 25TH: ABOVE NORMAL TEMPERATURES AND NEAR TO ABOVE
MEDIAN PRECIPITATION.
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