457
FNUS55 KPSR 310808
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
108 AM MST TUE MAR 31 2026
DISCUSSION
AS TEMPERATURES COOL SEVERAL DEGREES THROUGH WEDNESDAY, MID-LEVEL
MOISTURE AND CLOUDS WILL INCREASE MARKEDLY RESULTING IN A
CONTINUED CHANCES FOR SHOWERS, BUT LIKELY ONLY ISOLATED INSTANCES
OF WETTING RAINFALL. MINIMUM AFTERNOON HUMIDITY VALUES SHOULD
FALL INTO A 15-25% RANGE FOLLOWING FAIR TO GOOD OVERNIGHT RECOVERY
OF 40-70%. AFTERNOON WIND SPEEDS WILL INCREASE SLIGHTLY WITH
AFTERNOON GUSTS 20-25 MPH BECOMING COMMON.
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-312015-
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-
108 AM MST TUE MAR 31 2026
TODAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................85-93.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................15-22 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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............SOUTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......9700 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 22 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.................63-73.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................41-57 PCT.
* 24 HR TREND..................10 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 30 TO 40 MPH.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................PARTLY SUNNY IN THE MORNING
BECOMING SUNNY IN THE AFTERNOON. SLIGHT CHANCE OF SHOWERS IN THE
MORNING.
* MAX TEMPERATURE.................79-86.
* 24 HR TREND..................7 DEGREES COOLER.
* MIN HUMIDITY....................16-20 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 30 TO 40 MPH IN THE MORNING
BECOMING 15 TO 25 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................10 PERCENT IN THE MORNING
BECOMING 0 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......9500 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 13 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
EXTENDED
THURSDAY
MOSTLY CLEAR. LOWS 54-64. HIGHS 81-88. SOUTHWEST
WINDS 5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 53-63. HIGHS 81-87. NORTHWEST WINDS
10 TO 20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SATURDAY
MOSTLY CLEAR. LOWS 53-63. HIGHS 85-90. NORTH WINDS
10 TO 20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SUNDAY
MOSTLY CLEAR. LOWS 55-68. HIGHS 88-95.
MONDAY
PARTLY CLOUDY. LOWS 59-69. HIGHS 88-95.
AZZ131-CAZ231-312015-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
108 AM MST TUE MAR 31 2026 /108 AM PDT TUE MAR 31 2026/
TODAY
* SKY/WEATHER.....................MOSTLY CLOUDY.
* MAX TEMPERATURE.................88-93.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................14-21 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE MORNING
BECOMING WEST 5 TO 15 MPH IN THE AFTERNOON.
* 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.
* MIXING HEIGHT FOR YUMA..........8000 FT AGL.
* TRANSPORT WIND FOR YUMA.........WEST 12 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY.
* MIN TEMPERATURE.................64-69.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................45-55 PCT.
* 24 HR TREND..................9 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 35 TO 45 MPH.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................83-88.
* 24 HR TREND..................6 DEGREES COOLER.
* MIN HUMIDITY....................17-21 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 25 TO 35 MPH IN THE MORNING
BECOMING 15 TO 25 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........8100 FT AGL.
* TRANSPORT WIND FOR YUMA.........WEST 16 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
EXTENDED
THURSDAY
MOSTLY CLEAR. LOWS 54-59. HIGHS 84-89. SOUTHWEST
WINDS 10 TO 20 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 54-60. HIGHS 82-87. NORTHWEST WINDS
15 TO 25 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SATURDAY
MOSTLY CLEAR. LOWS 53-61. HIGHS 86-91. NORTH WINDS
15 TO 25 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SUNDAY
MOSTLY CLEAR. LOWS 53-65. HIGHS 90-95.
MONDAY
MOSTLY CLEAR. LOWS 58-65. HIGHS 92-97.
AZZ133-312015-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
108 AM MST TUE MAR 31 2026
TODAY
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................73-88.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................22-32 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 25 TO 35 MPH.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............11 PERCENT.
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY IN THE EVENING
BECOMING MOSTLY CLOUDY AFTER MIDNIGHT. SLIGHT CHANCE OF SHOWERS.
* MIN TEMPERATURE.................47-62.
* 24 HR TREND..................4 DEGREES COOLER.
* MAX HUMIDITY....................58-80 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 30 TO 40 MPH.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................10 PERCENT.
* CHANCE OF THUNDER...............6 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................PARTLY SUNNY. CHANCE OF SHOWERS
IN THE MORNING BECOMING SLIGHT CHANCE OF SHOWERS IN THE
AFTERNOON.
* MAX TEMPERATURE.................63-79.
* 24 HR TREND..................10 DEGREES COOLER.
* MIN HUMIDITY....................20-32 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 35 TO 45 MPH IN THE MORNING
BECOMING 20 TO 30 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................50 PERCENT.
* CWR (>= 0.10 IN)................40 PERCENT.
* CHANCE OF THUNDER...............5 PERCENT.
EXTENDED
THURSDAY
MOSTLY CLEAR. LOWS 41-57. HIGHS 68-82. SOUTH WINDS
10 TO 20 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 41-57. HIGHS 68-82. WEST WINDS 15 TO
25 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 41-60. HIGHS 70-86. NORTHEAST
WINDS 15 TO 25 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SUNDAY
MOSTLY CLEAR. LOWS 43-62. HIGHS 72-89.
MONDAY
PARTLY CLOUDY. LOWS 46-63. HIGHS 72-88.
CAZ232-312015-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
108 AM PDT TUE MAR 31 2026
TODAY
* SKY/WEATHER.....................MOSTLY CLOUDY.
* MAX TEMPERATURE.................82-92.
* 24 HR TREND..................7 DEGREES COOLER.
* MIN HUMIDITY....................13-22 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY.
* MIN TEMPERATURE.................61-68.
* 24 HR TREND..................4 DEGREES COOLER.
* MAX HUMIDITY....................43-58 PCT.
* 24 HR TREND..................8 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 35 TO 45 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................77-87.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................16-25 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 10 TO 20 MPH.
* WINDS...10000 FT MSL............NORTHWEST 25 TO 35 MPH IN THE
MORNING BECOMING WEST 15 TO 25 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
THURSDAY
MOSTLY CLEAR. LOWS 55-62. HIGHS 78-88. WEST WINDS
10 TO 20 MPH.
FRIDAY
BREEZY. MOSTLY CLEAR. LOWS 57-64. HIGHS 76-86. NORTH
WINDS 20 TO 30 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SATURDAY
BREEZY. MOSTLY CLEAR. LOWS 57-65. HIGHS 81-90. NORTH
WINDS 20 TO 30 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SUNDAY
MOSTLY CLEAR. LOWS 58-69. HIGHS 85-94.
MONDAY
MOSTLY CLEAR. LOWS 61-69. HIGHS 87-96.
CAZ230-312015-
JOSHUA TREE NATIONAL PARK-
108 AM PDT TUE MAR 31 2026
TODAY
* SKY/WEATHER.....................MOSTLY CLOUDY.
* MAX TEMPERATURE.................68-84.
* 24 HR TREND..................9 DEGREES COOLER.
* MIN HUMIDITY....................14-22 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY.
* MIN TEMPERATURE.................45-61.
* 24 HR TREND..................10 DEGREES COOLER.
* MAX HUMIDITY....................50-79 PCT.
* 24 HR TREND..................35 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 10 TO 20 MPH.
* WINDS...10000 FT MSL............WEST 30 TO 40 MPH.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................66-81.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................17-31 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
THURSDAY
MOSTLY CLEAR. LOWS 43-57. HIGHS 67-82. WEST WINDS
10 TO 20 MPH.
FRIDAY
BREEZY. MOSTLY CLEAR. LOWS 45-57. HIGHS 65-78. NORTH
WINDS 20 TO 30 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SATURDAY
BREEZY. MOSTLY CLEAR. LOWS 46-59. HIGHS 70-83. NORTH
WINDS 20 TO 30 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SUNDAY
MOSTLY CLEAR. LOWS 50-63. HIGHS 75-87.
MONDAY
MOSTLY CLEAR. LOWS 53-63. HIGHS 77-90.
8 TO 10 DAY OUTLOOK
TUESDAY APRIL 7TH THROUGH THURSDAY APRIL
9TH: ABOVE NORMAL TEMPERATURES AND NEAR MEDIAN PRECIPITATION.
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