049
FNUS55 KPSR 061903
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
1203 PM MST SUN SEP 6 2026
DISCUSSION
TEMPERATURES WILL BE SLIGHTLY BELOW NORMAL ACROSS SE CA TODAY.
OTHERWISE, TEMPERATURES WILL BE NEAR TO SLIGHTLY ABOVE NORMAL
ELSEWHERE. RAIN CHANCES TODAY WILL BE CONFINED TO JOSHUA TREE
NATIONAL PARK, WITH CHANCES FOR WETTING RAINFALL VERY LOW.
OTHERWISE, DRY CONDITIONS ARE EXPECTED. MINRH'S WILL BE AROUND
20-30% AREA WIDE TODAY WITH SLIGHTLY LOWER VALUES FOR MONDAY AND
TUESDAY ALONG WITH GOOD OVERNIGHT RECOVERIES. SOME ELEVATED
AFTERNOON/EARLY EVENING BREEZINESS OUT OF THE NORTHWEST IS
EXPECTED TODAY WITH PEAK GUSTS OF 20-30 MPH. A MORE TYPICAL
DIURNAL WIND PATTERN WITH SOME OCCASIONAL AFTERNOON UPSLOPE
BREEZINESS CAN BE EXPECTED DURING THE FIRST HALF OF THE WEEK.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-070715-
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-
1203 PM MST SUN SEP 6 2026
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................77-87.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................40-52 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
MONDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................99-107.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................19-25 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......11600 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 10 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
MONDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................79-89.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................39-47 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................102-108.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................18-22 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......10100 FT AGL.
* TRANSPORT WIND FOR PHOENIX......NORTHWEST 5 KNOTS.
* DISPERSION FOR PHOENIX..........GOOD.
EXTENDED
WEDNESDAY
MOSTLY CLEAR. LOWS 81-91. HIGHS 102-107. SOUTHWEST
WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 81-91. HIGHS 102-108. SOUTHWEST
WINDS 5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 77-87. HIGHS 100-106. SOUTHWEST WINDS 10 TO
20 MPH.
SATURDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 76-86. HIGHS 96-103.
SUNDAY
MOSTLY CLEAR. LOWS 75-85. HIGHS 95-102.
AZZ131-CAZ231-070715-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
1203 PM MST SUN SEP 6 2026 /1203 PM PDT SUN SEP 6 2026/
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................78-84.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................46-60 PCT.
* 24 HR TREND..................11 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
MONDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................101-107.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................22-28 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 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.
* MIXING HEIGHT FOR YUMA..........10600 FT AGL.
* TRANSPORT WIND FOR YUMA.........NORTHWEST 8 KNOTS.
* DISPERSION FOR YUMA.............GOOD.
MONDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................81-86.
* 24 HR TREND..................3 DEGREES WARMER.
* MAX HUMIDITY....................42-51 PCT.
* 24 HR TREND..................6 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 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................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................104-109.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................20-24 PCT.
* 24 HR TREND..................4 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
* MIXING HEIGHT FOR YUMA..........11000 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 6 KNOTS.
* DISPERSION FOR YUMA.............FAIR.
EXTENDED
WEDNESDAY
MOSTLY CLEAR. LOWS 82-87. HIGHS 104-109. SOUTH WINDS
5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 83-88. HIGHS 105-110. SOUTH WINDS
5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 81-87. HIGHS 104-109. SOUTH WINDS
10 TO 20 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 77-85. HIGHS 101-106.
SUNDAY
CLEAR. LOWS 77-82. HIGHS 99-104.
AZZ133-070715-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
1203 PM MST SUN SEP 6 2026
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................66-81.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................41-63 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE EVENING
BECOMING NORTH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............5 PERCENT.
MONDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................88-103.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................17-27 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 10 MPH IN THE MORNING
BECOMING WEST 5 TO 15 MPH IN THE AFTERNOON.
* 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.
MONDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................65-81.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................38-63 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE EVENING
BECOMING NORTHEAST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................90-105.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................17-26 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 10 MPH IN THE MORNING
BECOMING WEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
EXTENDED
WEDNESDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 66-83. HIGHS 90-104. SOUTH WINDS 5 TO 10 MPH.
THURSDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 65-83. HIGHS 88-103. SOUTHWEST WINDS 5 TO
15 MPH.
FRIDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 63-82. HIGHS 85-99. SOUTHWEST WINDS 5 TO
15 MPH.
SATURDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 62-78. HIGHS 81-95.
SUNDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 61-77. HIGHS 81-95.
CAZ232-070715-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
1203 PM PDT SUN SEP 6 2026
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................76-85.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................49-70 PCT.
* 24 HR TREND..................11 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 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...............4 PERCENT.
MONDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................95-105.
* 24 HR TREND..................5 DEGREES WARMER.
* MIN HUMIDITY....................24-34 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
MONDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................79-86.
* 24 HR TREND..................3 DEGREES WARMER.
* MAX HUMIDITY....................43-63 PCT.
* 24 HR TREND..................7 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 5 TO 15 MPH IN THE EVENING
BECOMING LIGHT AND VARIABLE AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................99-108.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................20-29 PCT.
* 24 HR TREND..................4 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
EXTENDED
WEDNESDAY
MOSTLY CLEAR. LOWS 83-89. HIGHS 100-109. SOUTHWEST
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 83-89. HIGHS 100-110. SOUTHWEST
WINDS 5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 78-89. HIGHS 100-110. SOUTH WINDS
10 TO 20 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 75-85. HIGHS 97-107.
SUNDAY
CLEAR. LOWS 75-82. HIGHS 94-104.
CAZ230-070715-
JOSHUA TREE NATIONAL PARK-
1203 PM PDT SUN SEP 6 2026
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................67-76.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................64-81 PCT.
* 24 HR TREND..................12 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...............4 PERCENT.
MONDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................82-95.
* 24 HR TREND..................8 DEGREES WARMER.
* MIN HUMIDITY....................31-44 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............7 PERCENT.
MONDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................69-80.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................52-66 PCT.
* 24 HR TREND..................12 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 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.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................86-100.
* 24 HR TREND..................4 DEGREES WARMER.
* MIN HUMIDITY....................23-37 PCT.
* 24 HR TREND..................7 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............4 PERCENT.
EXTENDED
WEDNESDAY
MOSTLY CLEAR. LOWS 71-85. HIGHS 88-103. NORTHWEST
WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 72-85. HIGHS 90-104. WEST WINDS
5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 68-85. HIGHS 89-104. SOUTHWEST WINDS
10 TO 20 MPH.
SATURDAY
CLEAR. LOWS 65-80. HIGHS 86-101.
SUNDAY
CLEAR. LOWS 65-77. HIGHS 84-98.
8 TO 10 DAY OUTLOOK
MONDAY SEPTEMBER 14TH THROUGH WEDNESDAY
SEPTEMBER 16TH: NEAR NORMAL TEMPERATURES AND ABOVE MEDIAN
PRECIPITATION.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page