974
FNUS55 KPSR 202000
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
100 PM MST TUE OCT 20 2026
DISCUSSION
WIND SPEEDS TODAY WILL GENERALLY REMAIN LIGHT WITH LIMITED
AFTERNOON GUSTINESS BEFORE INCREASING TOWARDS THE MIDDLE OF THE
WEEK AHEAD OF AN APPROACHING WEATHER SYSTEM. MAINLY DRY CONDITIONS
WILL PREVAIL THIS AFTERNOON BEFORE RAIN CHANCES INCREASE
SUBSTANTIALLY WEDNESDAY AND THURSDAY WITH SIGNIFICANT RAINFALL
AMOUNTS, IN EXCESS OF 1.00", LIKELY ACROSS THE HIGHER TERRAIN
AREAS OF THE EASTERN DISTRICTS. MINRHS TODAY WILL RANGE BETWEEN
30-50% BEFORE INCREASING ABOVE 50-60% ACROSS THE EASTERN DISTRICTS
WEDNESDAY AND THURSDAY ALONG WITH GOOD TO EXCELLENT OVERNIGHT
RECOVERIES. TEMPERATURES WILL BE IN A NEAR NORMAL RANGE TOMORROW
BEFORE FALLING INTO A BELOW NORMAL CATEGORY BY THE END OF THE WEEK
AND LASTING THROUGH THE WEEKEND.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-210800-
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-
100 PM MST TUE OCT 20 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MIN TEMPERATURE.................68-78.
* 24 HR TREND..................4 DEGREES WARMER.
* MAX HUMIDITY....................67-80 PCT.
* 24 HR TREND..................7 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 30 TO 40 MPH.
* CHANCE OF PRECIP................10 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............10 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS.
* MAX TEMPERATURE.................82-90.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................37-51 PCT.
* 24 HR TREND..................11 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 35 TO 45 MPH.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT WEST PORTION...10
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............16 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......2900 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHEAST 7 KNOTS.
* DISPERSION FOR PHOENIX..........MARGINAL.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. CHANCE OF SHOWERS
IN THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS . SHOWERS LIKELY
AFTER MIDNIGHT.
* MIN TEMPERATURE.................66-76.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................74-91 PCT.
* 24 HR TREND..................9 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 35 TO 45 MPH.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT WEST PORTION...40
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............13 PERCENT.
THURSDAY
* SKY/WEATHER.....................PARTLY SUNNY. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS.
* MAX TEMPERATURE.................77-84.
* 24 HR TREND..................6 DEGREES COOLER.
* MIN HUMIDITY....................36-61 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH IN THE
MORNING BECOMING SOUTHWEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 35 TO 45 MPH.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT WEST PORTION...40
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............11 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......7200 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 22 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
EXTENDED
FRIDAY
MOSTLY CLEAR. LOWS 57-67. HIGHS 72-78. WEST WINDS 5 TO
10 MPH.
SATURDAY
CLEAR. LOWS 57-67. HIGHS 73-80. NORTHWEST WINDS 5 TO
10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 57-67. HIGHS 76-82. NORTHEAST WINDS
5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 59-69. HIGHS 78-84.
TUESDAY
MOSTLY CLEAR. LOWS 60-70. HIGHS 76-83.
AZZ131-CAZ231-210800-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
100 PM MST TUE OCT 20 2026 /100 PM PDT TUE OCT 20 2026/
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................66-73.
* 24 HR TREND..................4 DEGREES WARMER.
* MAX HUMIDITY....................68-83 PCT.
* 24 HR TREND..................12 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 20 TO 30 MPH IN THE EVENING
BECOMING 30 TO 40 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................85-90.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................32-37 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 10 MPH IN THE
MORNING BECOMING SOUTH 10 TO 20 MPH IN THE AFTERNOON.
* 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.
* MIXING HEIGHT FOR YUMA..........6600 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 12 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
WEDNESDAY NIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................65-70.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................72-83 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 25 TO 35 MPH IN THE EVENING
BECOMING 35 TO 45 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................79-84.
* 24 HR TREND..................6 DEGREES COOLER.
* MIN HUMIDITY....................34-38 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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...............1 PERCENT.
* MIXING HEIGHT FOR YUMA..........8000 FT AGL.
* TRANSPORT WIND FOR YUMA.........WEST 17 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
EXTENDED
FRIDAY
CLEAR. LOWS 56-63. HIGHS 75-80. NORTHWEST WINDS 5 TO
15 MPH.
SATURDAY
CLEAR. LOWS 57-63. HIGHS 77-82. NORTH WINDS 10 TO
20 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 57-65. HIGHS 78-83. NORTH WINDS 5 TO
15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 58-65. HIGHS 81-86.
TUESDAY
MOSTLY CLEAR. LOWS 58-65. HIGHS 78-83.
AZZ133-210800-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
100 PM MST TUE OCT 20 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY IN THE EVENING
BECOMING PARTLY CLOUDY AFTER MIDNIGHT. SLIGHT CHANCE OF SHOWERS
IN THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS . CHANCE OF
SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.................57-70.
* 24 HR TREND..................4 DEGREES WARMER.
* MAX HUMIDITY....................74-94 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 25 TO 35 MPH.
* CHANCE OF PRECIP................40 PERCENT.
* CWR (>= 0.10 IN)................10 PERCENT.
* CHANCE OF THUNDER...............24 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY CLOUDY. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING BECOMING
SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................71-84.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................47-68 PCT.
* 24 HR TREND..................12 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 30 TO 40 MPH.
* CHANCE OF PRECIP................70 PERCENT.
* CWR (>= 0.10 IN)................40 PERCENT.
* CHANCE OF THUNDER...............39 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. SHOWERS LIKELY IN
THE EVENING. CHANCE OF THUNDERSTORMS . SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.................56-68.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................86-100 PCT.
* 24 HR TREND..................10 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 30 TO 40 MPH.
* CHANCE OF PRECIP................90 PERCENT.
* CWR (>= 0.10 IN)................90 PERCENT.
* CHANCE OF THUNDER...............43 PERCENT.
THURSDAY
* SKY/WEATHER.....................CLOUDY. SHOWERS AND CHANCE OF
THUNDERSTORMS.
* MAX TEMPERATURE.................63-77.
* 24 HR TREND..................8 DEGREES COOLER.
* MIN HUMIDITY....................66-90 PCT.
* 24 HR TREND..................22 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH IN THE
MORNING BECOMING SOUTH 5 TO 10 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 35 TO 45 MPH.
* CHANCE OF PRECIP................100 PERCENT.
* CWR (>= 0.10 IN)................100 PERCENT.
* CHANCE OF THUNDER...............51 PERCENT.
EXTENDED
FRIDAY
MOSTLY CLEAR WITH CHANCE OF SHOWERS. LOWS 46-63. HIGHS
61-74. SOUTHWEST WINDS 5 TO 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 45-60. HIGHS 60-73. NORTHEAST
WINDS 5 TO 10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 45-61. HIGHS 62-76. NORTHEAST WINDS
5 TO 15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 47-62. HIGHS 64-78.
TUESDAY
MOSTLY CLEAR. LOWS 48-62. HIGHS 64-78.
CAZ232-210800-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
100 PM PDT TUE OCT 20 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................64-70.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................65-88 PCT.
* 24 HR TREND..................17 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 15 TO 25 MPH IN THE EVENING
BECOMING 25 TO 35 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................80-89.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................30-43 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 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...............2 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................63-69.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................68-84 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...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................73-82.
* 24 HR TREND..................7 DEGREES COOLER.
* MIN HUMIDITY....................32-46 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 10 TO 20 MPH.
* WINDS...10000 FT MSL............SOUTH 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
EXTENDED
FRIDAY
CLEAR. LOWS 55-64. HIGHS 71-80. NORTHWEST WINDS 5 TO
15 MPH.
SATURDAY
CLEAR. LOWS 57-65. HIGHS 74-83. NORTHWEST WINDS 10 TO
20 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 57-66. HIGHS 74-83. NORTH WINDS
10 TO 20 MPH.
MONDAY
MOSTLY CLEAR. LOWS 59-66. HIGHS 76-85.
TUESDAY
MOSTLY CLEAR. LOWS 59-66. HIGHS 74-82.
CAZ230-210800-
JOSHUA TREE NATIONAL PARK-
100 PM PDT TUE OCT 20 2026
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................54-65.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................68-85 PCT.
* 24 HR TREND..................21 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE EVENING
BECOMING MOSTLY DOWNSLOPE/DOWNVALLEY AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTH 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................69-83.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................34-49 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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...............0 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................51-63.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................74-95 PCT.
* 24 HR TREND..................7 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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...............1 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS.
* MAX TEMPERATURE.................60-76.
* 24 HR TREND..................7 DEGREES COOLER.
* MIN HUMIDITY....................37-59 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 25 TO 35 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...............5 PERCENT.
EXTENDED
FRIDAY
CLEAR. LOWS 45-59. HIGHS 60-73. NORTHWEST WINDS 5 TO
15 MPH.
SATURDAY
CLEAR. LOWS 48-59. HIGHS 62-75. NORTHWEST WINDS 15 TO
25 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 49-59. HIGHS 64-76. NORTH WINDS 5 TO
15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 50-59. HIGHS 65-78.
TUESDAY
MOSTLY CLEAR. LOWS 50-61. HIGHS 63-75.
8 TO 10 DAY OUTLOOK
TUESDAY OCTOBER 27TH THROUGH THURSDAY
OCTOBER 29TH: ABOVE NORMAL TEMPERATURES AND ABOVE MEDIAN PRECIPITATION.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page