107
FNUS55 KPSR 052215
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
315 PM MST TUE MAY 5 2026
DISCUSSION
A RAPID WARMING TREND FROM BELOW TO ABOVE NORMAL TEMPERATURES WILL
OCCUR BETWEEN WEDNESDAY AND FRIDAY, SUCH THAT LOWER DESERT HIGHS
REACH THE TRIPLE DIGITS BY THE END OF THE WEEK. LINGERING BREEZY
CONDITIONS WILL CONTINUE INTO TONIGHT, WITH THE HIGHEST GUSTS
EXPECTED ACROSS WESTERN IMPERIAL COUNTY. GENERALLY LIGHT WINDS,
WITH MODEST AFTERNOON UPSLOPE BREEZES, CAN BE EXPECTED FOR
WEDNESDAY AND THURSDAY. AFTERNOON MINRHS WILL FALL FROM AROUND
15-25% WEDNESDAY TO NEAR 10% AREAWIDE BY THURSDAY. OVERNIGHT
RECOVERIES WILL ALSO DROP FROM A 45-70% RANGE TONIGHT INTO A
35-55% RANGE THURSDAY NIGHT. HUMIDITIES WILL DECREASE FURTHER THIS
WEEKEND.
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-061015-
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-
315 PM MST TUE MAY 5 2026
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................50-60.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................49-64 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 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...............2 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................79-85.
* 24 HR TREND..................7 DEGREES WARMER.
* MIN HUMIDITY....................16-20 PCT.
* 24 HR TREND..................8 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......7500 FT AGL.
* TRANSPORT WIND FOR PHOENIX......NORTHWEST 5 KNOTS.
* DISPERSION FOR PHOENIX..........FAIR.
WEDNESDAY NIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................56-66.
* 24 HR TREND..................6 DEGREES WARMER.
* MAX HUMIDITY....................31-45 PCT.
* 24 HR TREND..................18 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................89-95.
* 24 HR TREND..................10 DEGREES WARMER.
* MIN HUMIDITY....................8-12 PCT.
* 24 HR TREND..................7 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHEAST 5 TO 10 MPH IN THE
MORNING BECOMING WEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............NORTHEAST 10 TO 20 MPH IN THE
MORNING BECOMING NORTH 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......12500 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 5 KNOTS.
* DISPERSION FOR PHOENIX..........GOOD.
EXTENDED
FRIDAY
WARMER, CLEAR. LOWS 60-71. HIGHS 95-101. SOUTHWEST
WINDS 5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SATURDAY
CLEAR. LOWS 64-74. HIGHS 97-104. SOUTHWEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SUNDAY
CLEAR. LOWS 64-74. HIGHS 99-105. SOUTHWEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
MONDAY
CLEAR. LOWS 66-76. HIGHS 102-108.
TUESDAY
MOSTLY CLEAR. LOWS 68-78. HIGHS 102-108.
AZZ131-CAZ231-061015-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
315 PM MST TUE MAY 5 2026 /315 PM PDT TUE MAY 5 2026/
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................50-55.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................59-77 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................83-88.
* 24 HR TREND..................8 DEGREES WARMER.
* MIN HUMIDITY....................16-21 PCT.
* 24 HR TREND..................8 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........9400 FT AGL.
* TRANSPORT WIND FOR YUMA.........NORTH 5 KNOTS.
* DISPERSION FOR YUMA.............FAIR.
WEDNESDAY NIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................56-61.
* 24 HR TREND..................6 DEGREES WARMER.
* MAX HUMIDITY....................39-55 PCT.
* 24 HR TREND..................20 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 10 MPH IN THE
EVENING BECOMING SOUTH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............NORTHEAST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................93-98.
* 24 HR TREND..................10 DEGREES WARMER.
* MIN HUMIDITY....................8-13 PCT.
* 24 HR TREND..................8 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 10 MPH IN THE MORNING
BECOMING NORTHWEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............NORTH 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........14500 FT AGL.
* TRANSPORT WIND FOR YUMA.........NORTHWEST 6 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
EXTENDED
FRIDAY
CLEAR. LOWS 61-69. HIGHS 98-103. SOUTH WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
CLEAR. LOWS 63-70. HIGHS 101-106. SOUTHWEST WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SUNDAY
CLEAR. LOWS 64-71. HIGHS 102-107. SOUTH WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
MONDAY
CLEAR. LOWS 65-74. HIGHS 105-110.
TUESDAY
MOSTLY CLEAR. LOWS 67-74. HIGHS 105-110.
AZZ133-061015-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
315 PM MST TUE MAY 5 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR. AREAS OF SMOKE.
* MIN TEMPERATURE.................37-53.
* 24 HR TREND..................6 DEGREES COOLER.
* MAX HUMIDITY....................56-82 PCT.
* 24 HR TREND..................20 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 15 TO 25 MPH.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............10 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................65-79.
* 24 HR TREND..................7 DEGREES WARMER.
* MIN HUMIDITY....................18-27 PCT.
* 24 HR TREND..................16 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 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...............2 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................41-58.
* 24 HR TREND..................5 DEGREES WARMER.
* MAX HUMIDITY....................39-58 PCT.
* 24 HR TREND..................19 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE EVENING
BECOMING NORTHEAST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............NORTHEAST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
THURSDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................74-89.
* 24 HR TREND..................10 DEGREES WARMER.
* MIN HUMIDITY....................9-13 PCT.
* 24 HR TREND..................12 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHEAST 5 TO 10 MPH IN THE
MORNING BECOMING WEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............EAST 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...............1 PERCENT.
EXTENDED
FRIDAY
WARMER, CLEAR. LOWS 46-67. HIGHS 81-95. WEST WINDS
10 TO 20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SATURDAY
CLEAR. LOWS 50-68. HIGHS 83-98. WEST WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SUNDAY
CLEAR. LOWS 52-70. HIGHS 84-99. NORTHWEST WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
MONDAY
CLEAR. LOWS 53-72. HIGHS 87-103.
TUESDAY
MOSTLY CLEAR. LOWS 56-72. HIGHS 87-103.
CAZ232-061015-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
315 PM PDT TUE MAY 5 2026
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................52-58.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................48-69 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................78-88.
* 24 HR TREND..................9 DEGREES WARMER.
* MIN HUMIDITY....................16-22 PCT.
* 24 HR TREND..................8 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................59-66.
* 24 HR TREND..................8 DEGREES WARMER.
* MAX HUMIDITY....................33-58 PCT.
* 24 HR TREND..................15 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................90-98.
* 24 HR TREND..................10 DEGREES WARMER.
* MIN HUMIDITY....................7-13 PCT.
* 24 HR TREND..................8 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 5 TO 15 MPH IN THE
MORNING BECOMING NORTH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
FRIDAY
CLEAR. LOWS 64-73. HIGHS 94-103. WEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
CLEAR. LOWS 66-74. HIGHS 95-105. WEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SUNDAY
CLEAR. LOWS 66-76. HIGHS 97-106. SOUTH WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
MONDAY
CLEAR. LOWS 68-78. HIGHS 99-109.
TUESDAY
MOSTLY CLEAR. LOWS 68-78. HIGHS 100-109.
CAZ230-061015-
JOSHUA TREE NATIONAL PARK-
315 PM PDT TUE MAY 5 2026
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................42-54.
* 24 HR TREND..................3 DEGREES WARMER.
* MAX HUMIDITY....................52-68 PCT.
* 24 HR TREND..................11 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................71-85.
* 24 HR TREND..................12 DEGREES WARMER.
* MIN HUMIDITY....................15-25 PCT.
* 24 HR TREND..................13 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 15 TO 25 MPH IN THE
MORNING BECOMING NORTH 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................52-63.
* 24 HR TREND..................10 DEGREES WARMER.
* MAX HUMIDITY....................35-45 PCT.
* 24 HR TREND..................19 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 15 TO 25 MPH IN THE EVENING
BECOMING EAST 10 TO 20 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................80-92.
* 24 HR TREND..................9 DEGREES WARMER.
* MIN HUMIDITY....................8-14 PCT.
* 24 HR TREND..................9 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............EAST 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.
EXTENDED
FRIDAY
CLEAR. LOWS 57-69. HIGHS 84-99. WEST WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
CLEAR. LOWS 57-70. HIGHS 86-99. WEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SUNDAY
CLEAR. LOWS 59-72. HIGHS 87-101. SOUTHWEST WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
MONDAY
CLEAR. LOWS 62-74. HIGHS 90-103.
TUESDAY
MOSTLY CLEAR. LOWS 60-74. HIGHS 91-104.
8 TO 10 DAY OUTLOOK
WEDNESDAY MAY 13TH THROUGH FRIDAY MAY
15TH: ABOVE NORMAL TEMPERATURES AND NEAR MEDIAN PRECIPITATION.
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