735
FNUS55 KPSR 120723
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
1223 AM MST SAT SEP 12 2026
DISCUSSION
SLIGHT CHANCES FOR SHOWERS AND THUNDERSTORMS CAN BE EXPECTED
THROUGH THE WEEKEND, WITH THE BEST CHANCES OVER THE ARIZONA HIGH
TERRAIN. CHANCES ARE EXPECTED TO INCREASE ACROSS THE EASTERN
DISTRICTS EARLY NEXT WEEK. MINRHS THROUGH EARLY NEXT WEEK WILL
GENERALLY BE HOVER CLOSE TO 15-25% FOR THE FAR WESTERN DISTRICTS,
WHILE HIGHER VALUES CLOSER TO 25-35% WILL BE SEEN ELSEWHERE. 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 THIS 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.
AZZ132-121930-
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-
1223 AM MST SAT SEP 12 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................97-104.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................29-34 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...............4 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......7400 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 5 KNOTS.
* DISPERSION FOR PHOENIX..........FAIR.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................78-88.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................55-67 PCT.
* 24 HR TREND..................4 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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...............4 PERCENT.
SUNDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................97-104.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................26-31 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 10 MPH IN THE
MORNING BECOMING SOUTHWEST 5 TO 15 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......9400 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 6 KNOTS.
* DISPERSION FOR PHOENIX..........GOOD.
EXTENDED
MONDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 76-86. HIGHS 98-105. SOUTH WINDS 10 TO
20 MPH.
TUESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 74-84. HIGHS 96-104. SOUTHEAST WINDS 10 TO
20 MPH.
WEDNESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 74-84. HIGHS 96-104. SOUTHEAST WINDS 5 TO
15 MPH.
THURSDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 76-86. HIGHS 99-106.
FRIDAY
MOSTLY CLEAR. LOWS 77-87. HIGHS 100-108.
AZZ131-CAZ231-121930-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
1223 AM MST SAT SEP 12 2026 /1223 AM PDT SAT SEP 12 2026/
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................101-106.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................33-37 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
* MIXING HEIGHT FOR YUMA..........6700 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..................LITTLE CHANGE.
* MAX HUMIDITY....................55-74 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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.
SUNDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................101-106.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................28-33 PCT.
* 24 HR TREND..................4 PCT DRIER.
* 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...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........7700 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 11 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
EXTENDED
MONDAY
CLEAR. LOWS 77-83. HIGHS 101-106. SOUTH WINDS 10 TO
20 MPH.
TUESDAY
CLEAR. LOWS 74-82. HIGHS 100-105. SOUTH WINDS 10 TO
20 MPH.
WEDNESDAY
CLEAR. LOWS 74-80. HIGHS 100-105. SOUTHEAST WINDS
5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 75-83. HIGHS 102-107.
FRIDAY
CLEAR. LOWS 78-84. HIGHS 104-109.
AZZ133-121930-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
1223 AM MST SAT SEP 12 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................84-98.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................29-41 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...............8 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................63-80.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................60-84 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE EVENING
BECOMING MOSTLY DOWNSLOPE/DOWNVALLEY AFTER MIDNIGHT.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............5 PERCENT.
SUNDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................85-99.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................27-39 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.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............6 PERCENT.
EXTENDED
MONDAY
PARTLY CLOUDY WITH CHANCE OF THUNDERSTORMS AND SLIGHT
CHANCE OF SHOWERS. LOWS 62-80. HIGHS 83-98. SOUTH WINDS 5 TO
15 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 61-78. HIGHS 80-95. SOUTHEAST WINDS 5 TO
15 MPH.
WEDNESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 61-77. HIGHS 81-96. SOUTHEAST WINDS
5 TO 10 MPH.
THURSDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 61-78. HIGHS 82-99.
FRIDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 61-79. HIGHS 83-100.
CAZ232-121930-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
1223 AM PDT SAT SEP 12 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................97-107.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................25-37 PCT.
* 24 HR TREND..................7 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...............2 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................77-85.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................43-77 PCT.
* 24 HR TREND..................8 PCT DRIER.
* 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...............2 PERCENT.
SUNDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................96-107.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................16-30 PCT.
* 24 HR TREND..................8 PCT DRIER.
* 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
MONDAY
CLEAR. LOWS 74-82. HIGHS 96-106. SOUTH WINDS 5 TO
15 MPH.
TUESDAY
CLEAR. LOWS 72-80. HIGHS 95-105. SOUTH WINDS 10 TO
20 MPH.
WEDNESDAY
CLEAR. LOWS 72-80. HIGHS 95-104. SOUTH WINDS 5 TO
15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 74-83. HIGHS 97-106.
FRIDAY
CLEAR. LOWS 77-85. HIGHS 99-108.
CAZ230-121930-
JOSHUA TREE NATIONAL PARK-
1223 AM PDT SAT SEP 12 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................87-100.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................26-34 PCT.
* 24 HR TREND..................5 PCT WETTER.
* 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...............2 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................68-80.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................45-60 PCT.
* 24 HR TREND..................9 PCT DRIER.
* 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...............1 PERCENT.
SUNDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................85-99.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................19-26 PCT.
* 24 HR TREND..................8 PCT DRIER.
* 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...............0 PERCENT.
EXTENDED
MONDAY
CLEAR. LOWS 65-77. HIGHS 85-99. SOUTHWEST WINDS 5 TO
15 MPH.
TUESDAY
CLEAR. LOWS 63-75. HIGHS 82-97. SOUTHWEST WINDS 10 TO
20 MPH.
WEDNESDAY
CLEAR. LOWS 63-74. HIGHS 83-97. SOUTHWEST WINDS 5 TO
15 MPH.
THURSDAY
CLEAR. LOWS 65-77. HIGHS 86-99.
FRIDAY
CLEAR. LOWS 67-79. HIGHS 88-101.
8 TO 10 DAY OUTLOOK
SATURDAY SEPTEMBER 19TH THROUGH MONDAY
SEPTEMBER 21ST: ABOVE NORMAL TEMPERATURES AND NEAR MEDIAN
PRECIPITATION.
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