767
FNUS55 KPSR 220855
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
155 AM MST TUE SEP 22 2026
DISCUSSION
TEMPERATURES WILL REMAIN NEAR NORMAL WITH SHOWER AND THUNDERSTORM
CHANCES INCREASING OVER EASTERN DISTRICTS. GUSTY OUTFLOW WINDS
WILL BE THE GREATEST IMPACT FOR ONGOING INCIDENTS OR PRESCRIBED
BURNS WITH WETTING RAIN CHANCES REMAINING GENERALLY LESS THAN 20%.
MINIMUM HUMIDITY VALUES WILL FALL INTO A 15-30% RANGE FOLLOWING
FAIR TO GOOD OVERNIGHT RECOVERY OF 30-70%. WINDS ACROSS EASTERN
DISTRICTS WILL BEGIN TO MAINTAIN A SOUTHEAST DIRECTION WITH
INCREASING SPEEDS THE NEXT COUPLE DAYS, EVEN THROUGH THE
OVERNIGHT. WINDS IN WESTERN DISTRICTS WILL REMAIN LIGHT AND FOLLOW
FAMILIAR DIURNAL TENDENCIES.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-222100-
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-
155 AM MST TUE SEP 22 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................93-100.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................17-25 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 20 TO 30 MPH IN THE MORNING
BECOMING 10 TO 20 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......9400 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHEAST 12 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................73-83.
* 24 HR TREND..................4 DEGREES WARMER.
* MAX HUMIDITY....................39-62 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE EVENING
BECOMING EAST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTHEAST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................92-100.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................23-33 PCT.
* 24 HR TREND..................8 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............EAST 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............4 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......6600 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHEAST 6 KNOTS.
* DISPERSION FOR PHOENIX..........FAIR.
EXTENDED
THURSDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 72-82. HIGHS 90-98. EAST WINDS 5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 72-82. HIGHS 93-101. EAST WINDS 5 TO
15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 74-84. HIGHS 96-103. SOUTHEAST
WINDS 5 TO 15 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 72-82. HIGHS 93-101.
MONDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 70-80. HIGHS 92-100.
AZZ131-CAZ231-222100-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
155 AM MST TUE SEP 22 2026 /155 AM PDT TUE SEP 22 2026/
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................95-100.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................13-20 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 10 MPH IN THE
MORNING BECOMING WEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........8500 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTHWEST 5 KNOTS.
* DISPERSION FOR YUMA.............POOR.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................70-75.
* 24 HR TREND..................3 DEGREES WARMER.
* MAX HUMIDITY....................32-48 PCT.
* 24 HR TREND..................12 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE EVENING
BECOMING NORTHEAST AFTER MIDNIGHT.
* 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.
WEDNESDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................97-102.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................18-24 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHEAST 5 TO 10 MPH IN THE
MORNING BECOMING SOUTH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHEAST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........10600 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTHEAST 7 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
EXTENDED
THURSDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS. LOWS
74-80. HIGHS 95-101. SOUTHEAST WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 74-80. HIGHS 99-104. SOUTHEAST WINDS
5 TO 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 75-80. HIGHS 100-105. SOUTH WINDS
10 TO 20 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 72-80. HIGHS 97-102.
MONDAY
MOSTLY CLEAR. LOWS 70-77. HIGHS 96-101.
AZZ133-222100-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
155 AM MST TUE SEP 22 2026
TODAY
* SKY/WEATHER.....................PARTLY SUNNY. CHANCE OF SHOWERS
IN THE MORNING. SLIGHT CHANCE OF THUNDERSTORMS . SLIGHT CHANCE OF
SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.................78-95.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................25-40 PCT.
* 24 HR TREND..................7 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 15 TO 25 MPH.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............17 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MIN TEMPERATURE.................59-75.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................58-87 PCT.
* 24 HR TREND..................16 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 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...............13 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS IN THE MORNING. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................72-90.
* 24 HR TREND..................6 DEGREES COOLER.
* MIN HUMIDITY....................33-58 PCT.
* 24 HR TREND..................13 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............EAST 5 TO 15 MPH.
* CHANCE OF PRECIP................30 PERCENT.
* CWR (>= 0.10 IN)................20 PERCENT.
* CHANCE OF THUNDER...............26 PERCENT.
EXTENDED
THURSDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 55-72. HIGHS 75-92. EAST WINDS 5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 56-74. HIGHS 77-94. EAST WINDS 10 TO 20 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 58-75. HIGHS 80-97. EAST WINDS
5 TO 15 MPH.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 59-75. HIGHS 79-94.
MONDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 56-74. HIGHS 76-92.
CAZ232-222100-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
155 AM PDT TUE SEP 22 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................89-98.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................10-20 PCT.
* 24 HR TREND..................6 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 15 TO 25 MPH IN THE MORNING
BECOMING 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................71-78.
* 24 HR TREND..................4 DEGREES WARMER.
* MAX HUMIDITY....................28-46 PCT.
* 24 HR TREND..................14 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 10 TO 20 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..................3 DEGREES WARMER.
* MIN HUMIDITY....................15-23 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 10 MPH IN THE MORNING
BECOMING SOUTHEAST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHEAST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
THURSDAY
MOSTLY CLEAR. LOWS 74-81. HIGHS 90-100. SOUTHEAST
WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 74-81. HIGHS 93-103. SOUTH WINDS
5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 74-81. HIGHS 94-104. SOUTH WINDS
5 TO 15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 71-80. HIGHS 91-102.
MONDAY
MOSTLY CLEAR. LOWS 70-76. HIGHS 90-100.
CAZ230-222100-
JOSHUA TREE NATIONAL PARK-
155 AM PDT TUE SEP 22 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................78-90.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................18-23 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 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...............0 PERCENT.
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................63-71.
* 24 HR TREND..................4 DEGREES WARMER.
* MAX HUMIDITY....................35-44 PCT.
* 24 HR TREND..................10 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 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.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................81-94.
* 24 HR TREND..................4 DEGREES WARMER.
* MIN HUMIDITY....................20-24 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 10 MPH IN THE MORNING
BECOMING SOUTHEAST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHEAST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
THURSDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS. LOWS
64-75. HIGHS 80-93. SOUTHWEST WINDS 5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 64-76. HIGHS 81-95. SOUTHWEST WINDS
5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 63-76. HIGHS 81-96. SOUTHWEST
WINDS 10 TO 20 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 59-74. HIGHS 79-94.
MONDAY
MOSTLY CLEAR. LOWS 59-71. HIGHS 78-91.
8 TO 10 DAY OUTLOOK
TUESDAY SEPTEMBER 29TH THROUGH THURSDAY
OCTOBER 1ST: ABOVE NORMAL TEMPERATURES AND ABOVE MEDIAN
PRECIPITATION.
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