436
FNUS55 KPSR 212105
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
205 PM MST WED OCT 21 2026
DISCUSSION
STRONG TO SEVERE THUNDERSTORMS WITH HEAVY RAINFALL WILL BE
POSSIBLE OVER EASTERN DISTRICTS THROUGH THURSDAY WITH RAPID
CLEARING AND DRYING FRIDAY. WETTING RAINFALL WILL BE COMMON IN
THESE AREAS WITH SOME LOCATIONS EXPERIENCING AMOUNTS OVER 1 INCH
WITH LOCALIZED FLOODING. MINRHS WILL FALL INTO A 30-60% RANGE
WITH GOOD TO EXCELLENT OVERNIGHT RECOVERIES. GUSTY WEST WINDS
UPWARDS OF 25-30 MPH WILL BE POSSIBLE NEAR TERRAIN FEATURES OF SE
CALIFORNIA DISTRICTS THURSDAY AFTERNOON/EVENING.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-220915-
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-
205 PM MST WED OCT 21 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. CHANCE OF SHOWERS . CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................65-75.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................78-97 PCT.
* 24 HR TREND..................12 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 35 TO 45 MPH.
* CHANCE OF PRECIP................60 PERCENT EAST PORTION...10
PERCENT WEST PORTION.
* CWR (>= 0.10 IN)................0 PERCENT WEST PORTION...30
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............30 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS.
* MAX TEMPERATURE.................76-84.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................35-60 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 35 TO 45 MPH.
* CHANCE OF PRECIP................70 PERCENT WEST PORTION...10
PERCENT EAST PORTION.
* CWR (>= 0.10 IN)................0 PERCENT WEST PORTION...40
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............30 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......7400 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 21 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
THURSDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................55-65.
* 24 HR TREND..................9 DEGREES COOLER.
* MAX HUMIDITY....................69-90 PCT.
* 24 HR TREND..................9 PCT DRIER.
* 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...............1 PERCENT.
FRIDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................71-78.
* 24 HR TREND..................6 DEGREES COOLER.
* MIN HUMIDITY....................29-47 PCT.
* 24 HR TREND..................9 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 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...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......6500 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 3 KNOTS.
* DISPERSION FOR PHOENIX..........MARGINAL.
EXTENDED
SATURDAY
CLEAR. LOWS 55-65. HIGHS 72-78. NORTHWEST WINDS 5 TO
10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 56-66. HIGHS 75-82. NORTHEAST WINDS
5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 57-67. HIGHS 78-84. NORTHEAST WINDS
5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 58-68. HIGHS 79-85.
WEDNESDAY
PARTLY CLOUDY. LOWS 59-69. HIGHS 77-83.
AZZ131-CAZ231-220915-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
205 PM MST WED OCT 21 2026 /205 PM PDT WED OCT 21 2026/
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................65-70.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................76-90 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 35 TO 45 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................80-85.
* 24 HR TREND..................7 DEGREES COOLER.
* MIN HUMIDITY....................31-37 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE MORNING
BECOMING 10 TO 20 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 30 TO 40 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
* MIXING HEIGHT FOR YUMA..........7800 FT AGL.
* TRANSPORT WIND FOR YUMA.........WEST 12 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
THURSDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................55-61.
* 24 HR TREND..................10 DEGREES COOLER.
* MAX HUMIDITY....................69-90 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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.
FRIDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................74-79.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................27-36 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH IN THE
MORNING BECOMING 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 YUMA..........6400 FT AGL.
* TRANSPORT WIND FOR YUMA.........WEST 7 KNOTS.
* DISPERSION FOR YUMA.............GOOD.
EXTENDED
SATURDAY
CLEAR. LOWS 56-63. HIGHS 76-81. NORTHWEST WINDS 5 TO
15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 57-65. HIGHS 79-84. NORTH WINDS 5 TO
10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 57-65. HIGHS 81-86. NORTH WINDS 5 TO
15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 57-65. HIGHS 81-86.
WEDNESDAY
PARTLY CLOUDY. LOWS 58-65. HIGHS 80-85.
AZZ133-220915-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
205 PM MST WED OCT 21 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. CHANCE OF SHOWERS
IN THE EVENING. CHANCE OF THUNDERSTORMS . SHOWERS LIKELY AFTER
MIDNIGHT.
* MIN TEMPERATURE.................55-67.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................87-100 PCT.
* 24 HR TREND..................11 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 30 TO 40 MPH.
* CHANCE OF PRECIP................80 PERCENT.
* CWR (>= 0.10 IN)................80 PERCENT.
* CHANCE OF THUNDER...............60 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY CLOUDY. SHOWERS LIKELY IN
THE MORNING. CHANCE OF THUNDERSTORMS . SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.................64-77.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................64-87 PCT.
* 24 HR TREND..................11 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 35 TO 45 MPH.
* CHANCE OF PRECIP................90 PERCENT.
* CWR (>= 0.10 IN)................80 PERCENT.
* CHANCE OF THUNDER...............60 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.
* MIN TEMPERATURE.................51-62.
* 24 HR TREND..................5 DEGREES COOLER.
* MAX HUMIDITY....................83-100 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE EVENING
BECOMING MOSTLY DOWNSLOPE/DOWNVALLEY AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTHWEST 35 TO 45 MPH.
* CHANCE OF PRECIP................40 PERCENT IN THE EVENING
BECOMING 0 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................30 PERCENT.
* CHANCE OF THUNDER...............30 PERCENT.
FRIDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................63-75.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................46-63 PCT.
* 24 HR TREND..................21 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..LIGHT AND VARIABLE IN THE MORNING
BECOMING SOUTHWEST 5 TO 10 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
EXTENDED
SATURDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 44-59. HIGHS 60-73. NORTHEAST WINDS 5 TO
10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 44-59. HIGHS 62-75. NORTHEAST WINDS
5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 45-60. HIGHS 65-78. NORTHEAST WINDS
5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 47-61. HIGHS 66-79.
WEDNESDAY
PARTLY CLOUDY. LOWS 47-61. HIGHS 64-77.
CAZ232-220915-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
205 PM PDT WED OCT 21 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................62-69.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................70-84 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 30 TO 40 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................73-82.
* 24 HR TREND..................7 DEGREES COOLER.
* MIN HUMIDITY....................27-42 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 10 TO 20 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 30 TO 40 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................54-61.
* 24 HR TREND..................8 DEGREES COOLER.
* MAX HUMIDITY....................69-86 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* 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.
FRIDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................70-79.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................25-38 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 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
SATURDAY
CLEAR. LOWS 57-66. HIGHS 73-82. NORTHWEST WINDS 10 TO
20 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 58-66. HIGHS 75-85. NORTH WINDS 5 TO
15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 58-66. HIGHS 77-86. NORTH WINDS 5 TO
15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 58-66. HIGHS 77-86.
WEDNESDAY
PARTLY CLOUDY. LOWS 58-66. HIGHS 76-84.
CAZ230-220915-
JOSHUA TREE NATIONAL PARK-
205 PM PDT WED OCT 21 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................50-62.
* 24 HR TREND..................4 DEGREES COOLER.
* MAX HUMIDITY....................75-100 PCT.
* 24 HR TREND..................10 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 35 TO 45 MPH.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............4 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.................60-76.
* 24 HR TREND..................8 DEGREES COOLER.
* MIN HUMIDITY....................33-55 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 30 TO 40 MPH IN THE MORNING
BECOMING SOUTHWEST 15 TO 25 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............7 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................43-55.
* 24 HR TREND..................7 DEGREES COOLER.
* MAX HUMIDITY....................72-89 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 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.
FRIDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................60-72.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................34-46 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 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
SATURDAY
CLEAR. LOWS 48-59. HIGHS 62-75. NORTHWEST WINDS 15 TO
25 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 49-59. HIGHS 66-78. NORTH WINDS 5 TO
10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 50-59. HIGHS 67-79. NORTH WINDS 5 TO
10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 67-79.
WEDNESDAY
PARTLY CLOUDY. LOWS 49-60. HIGHS 66-78.
8 TO 10 DAY OUTLOOK
THURSDAY OCTOBER 29TH THROUGH SATURDAY
OCTOBER 31ST: NEAR NORMAL TEMPERATURES AND ABOVE MEDIAN
PRECIPITATION.
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