281
FNUS55 KPSR 282129
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
229 PM MST MON SEP 28 2026
DISCUSSION
ELEVATED MOISTURE LEVELS AND PERIODS OF SHOWERS AND THUNDERSTORMS
ARE EXPECTED THROUGH TUESDAY. THE PEAK TIME FRAME FOR RAINFALL
SHOULD BE TODAY OVER THE WESTERN DISTRICTS AND TONIGHT THROUGH
TUESDAY AFTERNOON FOR THE EASTERN DISTRICTS. CHANCES FOR WETTING
RAIN BETWEEN 40-80% SHOULD GREATLY LIMIT ANY THREAT OF DRY
LIGHTNING STARTS. OUTSIDE OF ENHANCED GUSTS ASSOCIATED WITH
STRONGER STORMS AND SOME MARGINAL NORTHWESTERLY BREEZINESS FOR THE
WESTERN DISTRICTS TUESDAY, WINDS WILL FOLLOW LIGHT AND DIURNAL
TRENDS OTHERWISE. DRIER AIR WILL START TO REENTER THE REGION BY
WEDNESDAY, BRINGING DOWN WETTING RAIN CHANCES ALONG WITH WESTERN
DISTRICT MINRHS.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-290930-
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-
229 PM MST MON SEP 28 2026
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY IN THE EVENING
BECOMING MOSTLY CLOUDY AFTER MIDNIGHT. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING BECOMING SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................63-73.
* 24 HR TREND..................6 DEGREES COOLER.
* MAX HUMIDITY....................84-100 PCT.
* 24 HR TREND..................20 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 10 MPH IN THE EVENING
BECOMING NORTHEAST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................70 PERCENT.
* CWR (>= 0.10 IN)................60 PERCENT WEST PORTION...70
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............28 PERCENT.
TUESDAY
* SKY/WEATHER.....................PARTLY SUNNY. CHANCE OF SHOWERS
IN THE MORNING. SLIGHT CHANCE OF THUNDERSTORMS . SLIGHT CHANCE OF
SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.................76-85.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................36-62 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 10 TO 20 MPH.
* CHANCE OF PRECIP................50 PERCENT.
* CWR (>= 0.10 IN)................10 PERCENT WEST PORTION...70
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............19 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......8000 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 14 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING.
* MIN TEMPERATURE.................61-71.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................67-97 PCT.
* 24 HR TREND..................8 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE EVENING
BECOMING EAST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............NORTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................10 PERCENT IN THE EVENING
BECOMING 0 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................0 PERCENT WEST PORTION...10
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............13 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................79-90.
* 24 HR TREND..................4 DEGREES WARMER.
* MIN HUMIDITY....................28-53 PCT.
* 24 HR TREND..................8 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 10 MPH IN THE MORNING
BECOMING WEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............NORTH 20 TO 30 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......WEST 6 KNOTS.
* DISPERSION FOR PHOENIX..........FAIR.
EXTENDED
THURSDAY
CLEAR. LOWS 63-73. HIGHS 84-93. EAST WINDS 5 TO
10 MPH.
FRIDAY
CLEAR. LOWS 67-77. HIGHS 86-96. EAST WINDS 10 TO
20 MPH.
SATURDAY
CLEAR. LOWS 68-78. HIGHS 88-98. EAST WINDS 10 TO
20 MPH.
SUNDAY
CLEAR. LOWS 69-79. HIGHS 90-100.
MONDAY
CLEAR. LOWS 69-79. HIGHS 90-98.
AZZ131-CAZ231-290930-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
229 PM MST MON SEP 28 2026 /229 PM PDT MON SEP 28 2026/
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS.
* MIN TEMPERATURE.................63-69.
* 24 HR TREND..................7 DEGREES COOLER.
* MAX HUMIDITY....................81-100 PCT.
* 24 HR TREND..................9 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 10 MPH IN THE
EVENING BECOMING NORTH 5 TO 15 MPH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................70 PERCENT.
* CWR (>= 0.10 IN)................50 PERCENT.
* CHANCE OF THUNDER...............20 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................84-90.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................28-43 PCT.
* 24 HR TREND..................20 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.
* WINDS...10000 FT MSL............NORTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............7 PERCENT.
* MIXING HEIGHT FOR YUMA..........11000 FT AGL.
* TRANSPORT WIND FOR YUMA.........NORTHWEST 24 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................62-69.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................61-90 PCT.
* 24 HR TREND..................19 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 30 TO 40 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................90-95.
* 24 HR TREND..................6 DEGREES WARMER.
* MIN HUMIDITY....................20-28 PCT.
* 24 HR TREND..................10 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 25 TO 35 MPH IN THE MORNING
BECOMING 15 TO 25 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........9000 FT AGL.
* TRANSPORT WIND FOR YUMA.........NORTHWEST 6 KNOTS.
* DISPERSION FOR YUMA.............GOOD.
EXTENDED
THURSDAY
CLEAR. LOWS 63-75. HIGHS 93-98. EAST WINDS 5 TO
10 MPH.
FRIDAY
CLEAR. LOWS 67-77. HIGHS 96-101. NORTHEAST WINDS 5 TO
15 MPH.
SATURDAY
CLEAR. LOWS 69-78. HIGHS 97-102. NORTHEAST WINDS 5 TO
15 MPH.
SUNDAY
CLEAR. LOWS 70-80. HIGHS 99-104.
MONDAY
CLEAR. LOWS 71-80. HIGHS 97-102.
AZZ133-290930-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
229 PM MST MON SEP 28 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. CHANCE OF
THUNDERSTORMS IN THE EVENING. SHOWERS . CHANCE OF THUNDERSTORMS
AFTER MIDNIGHT.
* MIN TEMPERATURE.................56-67.
* 24 HR TREND..................4 DEGREES COOLER.
* MAX HUMIDITY....................87-100 PCT.
* 24 HR TREND..................27 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................90 PERCENT.
* CWR (>= 0.10 IN)................90 PERCENT.
* CHANCE OF THUNDER...............36 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY CLOUDY. SHOWERS AND CHANCE
OF THUNDERSTORMS.
* MAX TEMPERATURE.................62-76.
* 24 HR TREND..................8 DEGREES COOLER.
* MIN HUMIDITY....................61-90 PCT.
* 24 HR TREND..................25 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 10 MPH IN THE MORNING
BECOMING NORTHWEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................100 PERCENT.
* CWR (>= 0.10 IN)................100 PERCENT.
* CHANCE OF THUNDER...............47 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. CHANCE OF SHOWERS . SLIGHT CHANCE
OF THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.................50-63.
* 24 HR TREND..................5 DEGREES COOLER.
* MAX HUMIDITY....................87-100 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 15 TO 25 MPH.
* CHANCE OF PRECIP................70 PERCENT.
* CWR (>= 0.10 IN)................70 PERCENT.
* CHANCE OF THUNDER...............28 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................PARTLY SUNNY. CHANCE OF SHOWERS
IN THE MORNING. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.................62-77.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................52-75 PCT.
* 24 HR TREND..................10 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................20 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............4 PERCENT.
EXTENDED
THURSDAY
CLEAR. LOWS 49-68. HIGHS 72-84. EAST WINDS 5 TO
15 MPH.
FRIDAY
CLEAR. LOWS 52-68. HIGHS 72-87. EAST WINDS 10 TO
20 MPH.
SATURDAY
CLEAR. LOWS 52-70. HIGHS 74-88. EAST WINDS 10 TO
20 MPH.
SUNDAY
CLEAR. LOWS 53-70. HIGHS 75-89.
MONDAY
MOSTLY CLEAR. LOWS 53-70. HIGHS 73-88.
CAZ232-290930-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
229 PM PDT MON SEP 28 2026
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. CHANCE OF SHOWERS
IN THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS . SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.................63-68.
* 24 HR TREND..................8 DEGREES COOLER.
* MAX HUMIDITY....................59-87 PCT.
* 24 HR TREND..................4 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE EVENING
BECOMING NORTH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH IN THE
EVENING BECOMING NORTHWEST 5 TO 15 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................30 PERCENT.
* CWR (>= 0.10 IN)................20 PERCENT.
* CHANCE OF THUNDER...............17 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................82-93.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................19-33 PCT.
* 24 HR TREND..................22 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............3 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................65-72.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................43-65 PCT.
* 24 HR TREND..................22 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 35 TO 45 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................88-98.
* 24 HR TREND..................6 DEGREES WARMER.
* MIN HUMIDITY....................14-22 PCT.
* 24 HR TREND..................8 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
THURSDAY
CLEAR. LOWS 67-77. HIGHS 90-98. EAST WINDS 5 TO
10 MPH.
FRIDAY
CLEAR. LOWS 70-78. HIGHS 91-100. NORTHEAST WINDS 5 TO
10 MPH.
SATURDAY
CLEAR. LOWS 72-79. HIGHS 92-102. NORTHEAST WINDS 5 TO
10 MPH.
SUNDAY
CLEAR. LOWS 73-80. HIGHS 93-103.
MONDAY
CLEAR. LOWS 73-80. HIGHS 92-102.
CAZ230-290930-
JOSHUA TREE NATIONAL PARK-
229 PM PDT MON SEP 28 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.
* MIN TEMPERATURE.................54-64.
* 24 HR TREND..................6 DEGREES COOLER.
* MAX HUMIDITY....................52-81 PCT.
* 24 HR TREND..................9 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE EVENING
BECOMING NORTH 5 TO 15 MPH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............EAST 5 TO 15 MPH IN THE EVENING
BECOMING NORTH 15 TO 25 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................30 PERCENT IN THE EVENING
BECOMING 0 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............15 PERCENT.
TUESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................74-85.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................26-31 PCT.
* 24 HR TREND..................15 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 15 TO 25 MPH.
* WINDS...10000 FT MSL............NORTH 15 TO 25 MPH IN THE MORNING
BECOMING NORTHWEST 30 TO 40 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................59-68.
* 24 HR TREND..................4 DEGREES WARMER.
* MAX HUMIDITY....................33-47 PCT.
* 24 HR TREND..................27 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 35 TO 45 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................81-93.
* 24 HR TREND..................8 DEGREES WARMER.
* MIN HUMIDITY....................12-17 PCT.
* 24 HR TREND..................14 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 10 TO 20 MPH.
* WINDS...10000 FT MSL............NORTH 20 TO 30 MPH IN THE MORNING
BECOMING NORTHWEST 10 TO 20 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
THURSDAY
CLEAR. LOWS 61-72. HIGHS 82-94. NORTH WINDS 5 TO
10 MPH.
FRIDAY
CLEAR. LOWS 63-73. HIGHS 82-94. SOUTHEAST WINDS 5 TO
15 MPH.
SATURDAY
CLEAR. LOWS 63-74. HIGHS 82-95. EAST WINDS 5 TO
15 MPH.
SUNDAY
CLEAR. LOWS 63-74. HIGHS 83-95.
MONDAY
CLEAR. LOWS 63-74. HIGHS 81-94.
8 TO 10 DAY OUTLOOK
TUESDAY OCTOBER 6TH THROUGH THURSDAY
OCTOBER 8TH:
ABOVE NORMAL TEMPERATURES AND NEAR MEDIAN PRECIPITATION.
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