562
FNUS55 KPSR 200903
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
203 AM MST TUE OCT 20 2026
DISCUSSION
MAINLY DRY CONDITIONS WILL PREVAIL TODAY BEFORE RAIN CHANCES
INCREASE SUBSTANTIALLY ACROSS THE EASTERN DISTRICTS WEDNESDAY AND
THURSDAY WITH THE POTENTIAL FOR PERIODS OF MODERATE TO HEAVY
RAINFALL ACTIVITY. MINRHS WILL BOTTOM OUT BETWEEN 30-50% TODAY
BEFORE INCREASING TO OVER 50-60% ACROSS THE EASTERN DISTRICTS
WEDNESDAY AND THURSDAY ALONG WITH GOOD TO EXCELLENT OVERNIGHT
RECOVERIES. WINDS WILL GENERALLY REMAIN LIGHT TODAY WITH LIMITED
AFTERNOON GUSTINESS BEFORE BECOMING BREEZY OUT OF THE SOUTH
WEDNESDAY.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-202115-
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-
203 AM MST TUE OCT 20 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................84-92.
* 24 HR TREND..................4 DEGREES WARMER.
* MIN HUMIDITY....................31-37 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 10 MPH IN THE MORNING
BECOMING SOUTH 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...............1 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......9900 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTH 12 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS IN THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS . CHANCE
OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.................67-77.
* 24 HR TREND..................4 DEGREES WARMER.
* MAX HUMIDITY....................69-81 PCT.
* 24 HR TREND..................9 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 WEST PORTION...10
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............11 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS IN THE MORNING. SLIGHT CHANCE OF THUNDERSTORMS . CHANCE
OF SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.................82-89.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................36-53 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................30 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT WEST PORTION...10
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............17 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......1900 FT AGL.
* TRANSPORT WIND FOR PHOENIX......EAST 5 KNOTS.
* DISPERSION FOR PHOENIX..........POOR.
EXTENDED
THURSDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 57-70. HIGHS 77-84. SOUTH WINDS
10 TO 20 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 56-66. HIGHS 73-79. NORTHWEST WINDS
5 TO 10 MPH.
SATURDAY
CLEAR. LOWS 56-66. HIGHS 75-81. NORTH WINDS 5 TO
10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 57-67. HIGHS 78-83.
MONDAY
MOSTLY CLEAR. LOWS 59-69. HIGHS 79-84.
AZZ131-CAZ231-202115-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
203 AM MST TUE OCT 20 2026 /203 AM PDT TUE OCT 20 2026/
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................86-91.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................30-35 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 10 MPH IN THE MORNING
BECOMING SOUTH 5 TO 15 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
* MIXING HEIGHT FOR YUMA..........8100 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 12 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD. DURING THE
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY.
* MIN TEMPERATURE.................66-72.
* 24 HR TREND..................3 DEGREES WARMER.
* MAX HUMIDITY....................73-87 PCT.
* 24 HR TREND..................16 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 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.
WEDNESDAY
* SKY/WEATHER.....................PARTLY SUNNY.
* MAX TEMPERATURE.................85-90.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................32-37 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 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...............3 PERCENT.
* MIXING HEIGHT FOR YUMA..........5800 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 14 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
EXTENDED
THURSDAY
MOSTLY CLEAR. LOWS 56-69. HIGHS 80-85. WEST WINDS
10 TO 20 MPH.
FRIDAY
CLEAR. LOWS 56-62. HIGHS 76-81. NORTHWEST WINDS 5 TO
15 MPH.
SATURDAY
CLEAR. LOWS 56-63. HIGHS 79-84. NORTH WINDS 10 TO
20 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 56-65. HIGHS 80-85.
MONDAY
MOSTLY CLEAR. LOWS 58-65. HIGHS 81-86.
AZZ133-202115-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
203 AM MST TUE OCT 20 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................72-87.
* 24 HR TREND..................4 DEGREES WARMER.
* MIN HUMIDITY....................34-51 PCT.
* 24 HR TREND..................4 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 10 MPH IN THE MORNING
BECOMING SOUTH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
10 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............10 PERCENT.
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY IN THE EVENING
BECOMING MOSTLY CLOUDY AFTER MIDNIGHT. SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE EVENING BECOMING CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................56-69.
* 24 HR TREND..................3 DEGREES WARMER.
* MAX HUMIDITY....................75-93 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................50 PERCENT.
* CWR (>= 0.10 IN)................20 PERCENT.
* CHANCE OF THUNDER...............28 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY CLOUDY. CHANCE OF SHOWERS
AND THUNDERSTORMS .
* MAX TEMPERATURE.................70-84.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................49-69 PCT.
* 24 HR TREND..................15 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 25 TO 35 MPH.
* CHANCE OF PRECIP................70 PERCENT.
* CWR (>= 0.10 IN)................50 PERCENT.
* CHANCE OF THUNDER...............35 PERCENT.
EXTENDED
THURSDAY
SHOWERS AND CHANCE OF THUNDERSTORMS. LOWS 50-68.
HIGHS 63-77. SOUTH WINDS 5 TO 15 MPH.
FRIDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS. LOWS 45-62.
HIGHS 61-74. SOUTHWEST WINDS 5 TO 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 45-59. HIGHS 61-75. NORTHEAST
WINDS 5 TO 15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 45-62. HIGHS 63-77.
MONDAY
MOSTLY CLEAR. LOWS 48-62. HIGHS 63-78.
CAZ232-202115-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
203 AM PDT TUE OCT 20 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................82-91.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................29-39 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 10 MPH IN THE MORNING
BECOMING SOUTHEAST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................64-70.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................65-90 PCT.
* 24 HR TREND..................19 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................80-90.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................27-40 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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...............1 PERCENT.
EXTENDED
THURSDAY
MOSTLY CLEAR. LOWS 55-68. HIGHS 73-83. WEST WINDS
15 TO 25 MPH.
FRIDAY
CLEAR. LOWS 55-64. HIGHS 72-81. NORTHWEST WINDS 5 TO
15 MPH.
SATURDAY
CLEAR. LOWS 57-64. HIGHS 74-84. NORTH WINDS 10 TO
20 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 57-65. HIGHS 75-84.
MONDAY
MOSTLY CLEAR. LOWS 58-65. HIGHS 76-85.
CAZ230-202115-
JOSHUA TREE NATIONAL PARK-
203 AM PDT TUE OCT 20 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................70-84.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................33-43 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................54-66.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................67-86 PCT.
* 24 HR TREND..................21 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH IN THE EVENING
BECOMING 20 TO 30 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................68-83.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................31-47 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
EXTENDED
THURSDAY
MOSTLY CLEAR WITH CHANCE OF SHOWERS. LOWS 45-63.
HIGHS 60-76. WEST WINDS 10 TO 20 MPH.
FRIDAY
CLEAR. LOWS 45-59. HIGHS 61-74. NORTHWEST WINDS 10 TO
20 MPH.
SATURDAY
CLEAR. LOWS 48-59. HIGHS 63-76. NORTH WINDS 15 TO
25 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 49-60. HIGHS 64-77.
MONDAY
MOSTLY CLEAR. LOWS 49-60. HIGHS 64-77.
8 TO 10 DAY OUTLOOK
TUESDAY OCTOBER 27TH THROUGH THURSDAY
OCTOBER 29TH: ABOVE NORMAL TEMPERATURES AND ABOVE MEDIAN PRECIPITATION.
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