327
FNUS55 KPSR 090828
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
128 AM MST MON MAR 9 2026
DISCUSSION
SCATTERED SHOWERS AND EMBEDDED THUNDERSTORMS WILL RESULT IN
COOLER TEMPERATURES, INCREASED HUMIDITY LEVELS, AND CHANCES FOR
WETTING RAINFALL THROUGH TUESDAY. AFTERNOON HUMIDITY LEVELS WILL
MOSTLY FALL INTO A 25-40% RANGE WITH GOOD TO EXCELLENT OVERNIGHT
RECOVERY. THE BEST CHANCES FOR PROLONGED SHOWERS AND WETTING RAINS
WILL BE IN EASTERN DISTRICTS BEFORE DRIER WEATHER FILTERS INTO
THE REGION TUESDAY EVENING. OUTSIDE OF GUSTY WINDS NEAR
THUNDERSTORMS THIS AFTERNOON AND EVENING, WINDS WILL BE FAIRLY
LIGHT.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-092030-
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-
128 AM MST MON MAR 9 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................72-80.
* 24 HR TREND..................9 DEGREES COOLER.
* MIN HUMIDITY....................29-44 PCT.
* 24 HR TREND..................22 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 10 MPH IN THE MORNING
BECOMING SOUTH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHEAST 30 TO 40 MPH.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
30 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................20 PERCENT WEST PORTION...0
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............15 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......6800 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 9 KNOTS.
* DISPERSION FOR PHOENIX..........GOOD.
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS .
* MIN TEMPERATURE.................50-60.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................77-100 PCT.
* 24 HR TREND..................24 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 20 TO 30 MPH IN THE
EVENING BECOMING EAST 10 TO 20 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................30 PERCENT.
* CWR (>= 0.10 IN)................20 PERCENT WEST PORTION...40
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............25 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................71-78.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................29-37 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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.
* MIXING HEIGHT FOR PHOENIX.......6900 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 11 KNOTS.
* DISPERSION FOR PHOENIX..........VERY GOOD.
EXTENDED
WEDNESDAY
CLEAR. LOWS 49-62. HIGHS 79-85. NORTHWEST WINDS 5 TO
15 MPH.
THURSDAY
CLEAR. LOWS 53-64. HIGHS 88-94. NORTH WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
FRIDAY
CLEAR. LOWS 56-66. HIGHS 91-96. NORTH WINDS 5 TO
10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
MOSTLY CLEAR. LOWS 57-67. HIGHS 91-96.
SUNDAY
MOSTLY CLEAR. LOWS 57-67. HIGHS 90-96.
AZZ131-CAZ231-092030-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
128 AM MST MON MAR 9 2026 /128 AM PDT MON MAR 9 2026/
TODAY
* SKY/WEATHER.....................PARTLY SUNNY. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................72-78.
* 24 HR TREND..................11 DEGREES COOLER.
* MIN HUMIDITY....................34-47 PCT.
* 24 HR TREND..................29 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
30 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................10 PERCENT.
* CHANCE OF THUNDER...............15 PERCENT.
* MIXING HEIGHT FOR YUMA..........6300 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 8 KNOTS.
* DISPERSION FOR YUMA.............FAIR.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR. SLIGHT CHANCE OF
SHOWERS IN THE EVENING.
* MIN TEMPERATURE.................49-54.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................83-100 PCT.
* 24 HR TREND..................20 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............EAST 15 TO 25 MPH.
* CHANCE OF PRECIP................20 PERCENT IN THE EVENING
BECOMING 0 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............5 PERCENT.
TUESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................76-81.
* 24 HR TREND..................4 DEGREES WARMER.
* MIN HUMIDITY....................27-34 PCT.
* 24 HR TREND..................11 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 5 TO 15 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.
* MIXING HEIGHT FOR YUMA..........5300 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTHWEST 8 KNOTS.
* DISPERSION FOR YUMA.............GOOD.
EXTENDED
WEDNESDAY
CLEAR. LOWS 51-61. HIGHS 83-88. NORTHWEST WINDS 5 TO
15 MPH.
THURSDAY
CLEAR. LOWS 53-64. HIGHS 91-96. NORTH WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
FRIDAY
CLEAR. LOWS 55-64. HIGHS 93-98. NORTHWEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
MOSTLY CLEAR. LOWS 56-64. HIGHS 93-98.
SUNDAY
MOSTLY CLEAR. LOWS 56-63. HIGHS 93-98.
AZZ133-092030-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
128 AM MST MON MAR 9 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................67-80.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................23-32 PCT.
* 24 HR TREND..................12 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 10 MPH IN THE
MORNING BECOMING SOUTHWEST 5 TO 15 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTH 20 TO 30 MPH IN THE MORNING
BECOMING 10 TO 20 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................30 PERCENT.
* CWR (>= 0.10 IN)................10 PERCENT.
* CHANCE OF THUNDER...............15 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLOUDY. SHOWERS LIKELY
AND A CHANCE OF THUNDERSTORMS.
* MIN TEMPERATURE.................42-53.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................89-100 PCT.
* 24 HR TREND..................42 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 10 TO 20 MPH.
* CHANCE OF PRECIP................70 PERCENT.
* CWR (>= 0.10 IN)................60 PERCENT.
* CHANCE OF THUNDER...............25 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY CLOUDY. SHOWERS LIKELY IN
THE MORNING BECOMING CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................54-69.
* 24 HR TREND..................12 DEGREES COOLER.
* MIN HUMIDITY....................44-66 PCT.
* 24 HR TREND..................28 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 5 TO 15 MPH IN THE
MORNING BECOMING NORTH 10 TO 20 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................70 PERCENT.
* CWR (>= 0.10 IN)................50 PERCENT.
* CHANCE OF THUNDER...............15 PERCENT.
EXTENDED
WEDNESDAY
CLEAR. LOWS 38-57. HIGHS 67-79. NORTHWEST WINDS 5 TO
15 MPH.
THURSDAY
CLEAR. LOWS 42-60. HIGHS 73-87. NORTHEAST WINDS 5 TO
15 MPH.
FRIDAY
CLEAR. LOWS 44-61. HIGHS 76-90. NORTHEAST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
CLEAR. LOWS 46-61. HIGHS 76-90.
SUNDAY
MOSTLY CLEAR. LOWS 46-61. HIGHS 77-90.
CAZ232-092030-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
128 AM PDT MON MAR 9 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.................68-77.
* 24 HR TREND..................11 DEGREES COOLER.
* MIN HUMIDITY....................28-46 PCT.
* 24 HR TREND..................26 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............EAST 25 TO 35 MPH IN THE MORNING
BECOMING SOUTHEAST 15 TO 25 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
10 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................10 PERCENT.
* CHANCE OF THUNDER...............2 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................50-55.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................72-93 PCT.
* 24 HR TREND..................17 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............EAST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TUESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................72-83.
* 24 HR TREND..................5 DEGREES WARMER.
* MIN HUMIDITY....................25-35 PCT.
* 24 HR TREND..................8 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
WEDNESDAY
CLEAR. LOWS 52-65. HIGHS 79-87. NORTHWEST WINDS 5 TO
10 MPH.
THURSDAY
CLEAR. LOWS 57-69. HIGHS 87-95. NORTH WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
FRIDAY
CLEAR. LOWS 59-69. HIGHS 89-98. NORTHWEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
MOSTLY CLEAR. LOWS 59-68. HIGHS 89-98.
SUNDAY
MOSTLY CLEAR. LOWS 59-69. HIGHS 90-97.
CAZ230-092030-
JOSHUA TREE NATIONAL PARK-
128 AM PDT MON MAR 9 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................60-72.
* 24 HR TREND..................7 DEGREES COOLER.
* MIN HUMIDITY....................21-32 PCT.
* 24 HR TREND..................15 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............EAST 25 TO 35 MPH IN THE MORNING
BECOMING 10 TO 20 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................42-52.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................69-89 PCT.
* 24 HR TREND..................28 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............EAST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TUESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................63-78.
* 24 HR TREND..................4 DEGREES WARMER.
* MIN HUMIDITY....................26-42 PCT.
* 24 HR TREND..................8 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
WEDNESDAY
CLEAR. LOWS 46-61. HIGHS 71-83. NORTH WINDS 5 TO
10 MPH.
THURSDAY
CLEAR. LOWS 52-64. HIGHS 77-89. NORTHWEST WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
FRIDAY
CLEAR. LOWS 56-65. HIGHS 79-92. NORTHWEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
MOSTLY CLEAR. LOWS 56-65. HIGHS 80-94.
SUNDAY
MOSTLY CLEAR. LOWS 56-67. HIGHS 80-93.
8 TO 10 DAY OUTLOOK
MONDAY MARCH 16TH THROUGH WEDNESDAY MARCH
18TH: ABOVE NORMAL TEMPERATURES AND BELOW MEDIAN PRECIPITATION.
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