480
FNUS55 KPSR 212025
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
125 PM MST TUE APR 21 2026
DISCUSSION
ABOVE-NORMAL TEMPERATURES WILL PERSIST THROUGH TODAY BEFORE
RELATIVELY COOLER CONDITIONS, WITH READINGS CLOSER TO SEASONAL
LEVELS, PREVAIL THROUGH THE MIDDLE PORTION OF THE WEEK. BREEZY TO
LOCALLY WINDY CONDITIONS WILL BE OBSERVED THIS AFTERNOON, WITH THE
STRONGEST GUSTS (AROUND 25-35 MPH) BEING OBSERVED IN THE WESTERN
DISTRICTS. THESE ENHANCED WINDS, COMBINED WITH MINRH VALUES
10-15%, WILL RESULT IN PERIODS OF ELEVATED, TO NEAR CRITICAL,
FIRE WEATHER THRESHOLDS. ELSEWHERE, THE CENTRAL AND EASTERN
DISTRICTS CAN EXPECTED SOME BREEZINESS AS WELL WITH READINGS
CLOSER TO 25 MPH, RESULTING IN ISOLATED INSTANCE OF ELEVATED FIRE
WEATHER CONDITIONS. MARGINAL BREEZINESS AND CONTINUED DRY
CONDITIONS WILL SHIFT FIRE WEATHER RISK MAINLY OVER THE EASTERN
DISTRICTS WEDNESDAY. OVERNIGHT RECOVERY WILL RANGE FROM POOR TO
GOOD AS MAXRHS HOVER AROUND 30-60%, WITH THE HIGHER VALUES
FAVORING MORE WESTERN ZONES. READINGS DIP WEDNESDAY NIGHT INTO
THURSDAY, DROPPING CLOSER TO 25-45%.
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-220830-
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-
125 PM MST TUE APR 21 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................54-64.
* 24 HR TREND..................4 DEGREES COOLER.
* MAX HUMIDITY....................36-66 PCT.
* 24 HR TREND..................22 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.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................80-87.
* 24 HR TREND..................7 DEGREES COOLER.
* MIN HUMIDITY....................12-16 PCT.
* 24 HR TREND..................4 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...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......8100 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 15 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................52-62.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................28-42 PCT.
* 24 HR TREND..................18 PCT DRIER.
* 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.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................82-88.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................8-12 PCT.
* 24 HR TREND..................3 PCT DRIER.
* 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.
* MIXING HEIGHT FOR PHOENIX.......10200 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 13 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
EXTENDED
FRIDAY
MOSTLY CLEAR. LOWS 54-64. HIGHS 84-91. SOUTHWEST WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SATURDAY
PARTLY CLOUDY. LOWS 50-64. HIGHS 80-87. SOUTHWEST
WINDS 15 TO 25 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 76-82. SOUTHWEST WINDS
10 TO 20 MPH.
MONDAY
MOSTLY CLEAR. LOWS 50-61. HIGHS 81-88.
TUESDAY
MOSTLY CLEAR. LOWS 54-64. HIGHS 84-91.
AZZ131-CAZ231-220830-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
125 PM MST TUE APR 21 2026 /125 PM PDT TUE APR 21 2026/
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................55-60.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................55-77 PCT.
* 24 HR TREND..................26 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 10 TO 20 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.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................81-86.
* 24 HR TREND..................7 DEGREES COOLER.
* MIN HUMIDITY....................13-17 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 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.
* MIXING HEIGHT FOR YUMA..........7100 FT AGL.
* TRANSPORT WIND FOR YUMA.........WEST 14 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................52-58.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................37-53 PCT.
* 24 HR TREND..................19 PCT DRIER.
* 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.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................84-89.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................9-13 PCT.
* 24 HR TREND..................4 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 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.
* MIXING HEIGHT FOR YUMA..........6500 FT AGL.
* TRANSPORT WIND FOR YUMA.........WEST 9 KNOTS.
* DISPERSION FOR YUMA.............GOOD.
EXTENDED
FRIDAY
MOSTLY CLEAR. LOWS 53-61. HIGHS 87-92. SOUTHWEST WINDS
10 TO 20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SATURDAY
BREEZY. PARTLY CLOUDY. LOWS 52-61. HIGHS 82-87.
SOUTHWEST WINDS 20 TO 30 MPH.
SUNDAY
CLEAR. LOWS 51-57. HIGHS 78-83. WEST WINDS 15 TO
25 MPH.
MONDAY
MOSTLY CLEAR. LOWS 51-59. HIGHS 83-88.
TUESDAY
MOSTLY CLEAR. LOWS 55-62. HIGHS 86-91.
AZZ133-220830-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
125 PM MST TUE APR 21 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................44-57.
* 24 HR TREND..................5 DEGREES COOLER.
* MAX HUMIDITY....................28-37 PCT.
* 24 HR TREND..................5 PCT DRIER.
* 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.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................70-84.
* 24 HR TREND..................6 DEGREES COOLER.
* MIN HUMIDITY....................13-19 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE MORNING
BECOMING SOUTHWEST 10 TO 20 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.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................42-56.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................28-43 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................69-83.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................10-15 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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...............0 PERCENT.
EXTENDED
FRIDAY
MOSTLY CLEAR. LOWS 42-59. HIGHS 71-86. SOUTHWEST WINDS
10 TO 20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SATURDAY
BREEZY. PARTLY CLOUDY. LOWS 44-59. HIGHS 69-83.
SOUTHWEST WINDS 20 TO 30 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 39-57. HIGHS 64-78. SOUTHWEST WINDS
15 TO 25 MPH.
MONDAY
CLEAR. LOWS 39-58. HIGHS 70-84.
TUESDAY
MOSTLY CLEAR. LOWS 43-60. HIGHS 73-87.
CAZ232-220830-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
125 PM PDT TUE APR 21 2026
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................53-60.
* 24 HR TREND..................4 DEGREES COOLER.
* MAX HUMIDITY....................48-62 PCT.
* 24 HR TREND..................20 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 10 TO 20 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.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................76-86.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................12-19 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 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.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................54-61.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................32-55 PCT.
* 24 HR TREND..................13 PCT DRIER.
* 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.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................80-88.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................9-14 PCT.
* 24 HR TREND..................4 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
FRIDAY
MOSTLY CLEAR. LOWS 57-64. HIGHS 82-91. WEST WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
BREEZY. PARTLY CLOUDY. LOWS 52-64. HIGHS 75-84. WEST
WINDS 20 TO 30 MPH.
SUNDAY
BREEZY. MOSTLY CLEAR. LOWS 51-60. HIGHS 73-82. WEST
WINDS 20 TO 30 MPH.
MONDAY
MOSTLY CLEAR. LOWS 51-61. HIGHS 78-87.
TUESDAY
MOSTLY CLEAR. LOWS 55-63. HIGHS 80-89.
CAZ230-220830-
JOSHUA TREE NATIONAL PARK-
125 PM PDT TUE APR 21 2026
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................39-52.
* 24 HR TREND..................8 DEGREES COOLER.
* MAX HUMIDITY....................52-70 PCT.
* 24 HR TREND..................29 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 10 TO 20 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.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................65-80.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................12-24 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 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...............0 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................43-56.
* 24 HR TREND..................3 DEGREES WARMER.
* MAX HUMIDITY....................36-47 PCT.
* 24 HR TREND..................19 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...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................69-82.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................9-14 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...............0 PERCENT.
EXTENDED
FRIDAY
MOSTLY CLEAR. LOWS 46-58. HIGHS 71-85. WEST WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
BREEZY. PARTLY CLOUDY. LOWS 39-58. HIGHS 63-79. WEST
WINDS 20 TO 30 MPH.
SUNDAY
BREEZY. MOSTLY CLEAR. LOWS 39-52. HIGHS 61-77. WEST
WINDS 20 TO 30 MPH.
MONDAY
MOSTLY CLEAR. LOWS 41-57. HIGHS 67-82.
TUESDAY
MOSTLY CLEAR. LOWS 46-58. HIGHS 69-84.
8 TO 10 DAY OUTLOOK
WEDNESDAY APRIL 29TH THROUGH FRIDAY MAY
1ST:
NEAR NORMAL TEMPERATURES AND ABOVE MEDIAN PRECIPITATION.
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