472
FNUS55 KPSR 190802
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
102 AM MST WED AUG 19 2026
DISCUSSION
FOR TODAY, EXPECT ABOVE NORMAL TEMPERATURES WITH INCREASING
MOISTURE AND RAIN CHANCES. SCATTERED THUNDERSTORMS PRODUCING
GUSTY WINDS ARE LIKELY TO IMPACT THE EASTERN DISTRICTS FROM LATE
AFTERNOON THROUGH THIS EVENING. ELEVATED MOISTURE LEVELS WILL
PERSIST THROUGH THURSDAY WITH ADDITIONAL CHANCES FOR SCATTERED
SHOWERS AND STORMS BEFORE SOME SLIGHT DRYING AND LOWER RAIN
CHANCES OCCURS FRIDAY INTO THE WEEKEND. MINRHS OF 20-30% ARE
ANTICIPATED THROUGH THURSDAY BEFORE LOWERING TO 15-25% BEGINNING
FRIDAY. OUTSIDE OF GUSTY AND ERRATIC WINDS NEAR ANY THUNDERSTORM,
OVERALL WINDS WILL FOLLOW THE TYPICAL DIURNAL TENDENCIES WITH SOME
MODEST AFTERNOON UPSLOPE GUSTINESS.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-192015-
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-
102 AM MST WED AUG 19 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................104-110.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................20-25 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE MORNING
BECOMING WEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............EAST 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.
* MIXING HEIGHT FOR PHOENIX.......9100 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 9 KNOTS.
* DISPERSION FOR PHOENIX..........VERY GOOD.
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. PATCHY BLOWING
DUST IN THE EVENING. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE EVENING.
* MIN TEMPERATURE.................82-92.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................47-57 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 5 TO 15 MPH.
* CHANCE OF PRECIP................20 PERCENT IN THE EVENING
BECOMING 10 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................0 PERCENT WEST PORTION...20
PERCENT EAST PORTION.
* CHANCE OF THUNDER...............19 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................104-110.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................20-24 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE MORNING
BECOMING SOUTHWEST IN THE AFTERNOON.
* WINDS...10000 FT MSL............EAST 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.
* MIXING HEIGHT FOR PHOENIX.......8600 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 6 KNOTS.
* DISPERSION FOR PHOENIX..........GOOD.
EXTENDED
FRIDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 82-92. HIGHS 105-112. SOUTHWEST WINDS 5 TO
10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 83-93. HIGHS 106-112. SOUTH WINDS
5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 81-91. HIGHS 103-110. SOUTHWEST WINDS 5 TO
15 MPH.
MONDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 80-90. HIGHS 102-108.
TUESDAY
MOSTLY CLEAR. LOWS 80-90. HIGHS 103-110.
AZZ131-CAZ231-192015-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
102 AM MST WED AUG 19 2026 /102 AM PDT WED AUG 19 2026/
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................106-111.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................22-28 PCT.
* 24 HR TREND..................9 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 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.
* MIXING HEIGHT FOR YUMA..........6500 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 10 KNOTS.
* DISPERSION FOR YUMA.............GOOD.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................83-88.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................50-63 PCT.
* 24 HR TREND..................4 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................106-111.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................21-25 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHEAST 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........9500 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 8 KNOTS.
* DISPERSION FOR YUMA.............VERY GOOD.
EXTENDED
FRIDAY
MOSTLY CLEAR. LOWS 85-90. HIGHS 108-113. SOUTH WINDS
5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 85-90. HIGHS 109-114. SOUTH WINDS
5 TO 15 MPH.
SUNDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 83-90. HIGHS 106-111. SOUTH WINDS 5 TO
15 MPH.
MONDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 82-87. HIGHS 104-109.
TUESDAY
MOSTLY CLEAR. LOWS 83-88. HIGHS 106-111.
AZZ133-192015-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
102 AM MST WED AUG 19 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY. CHANCE OF
THUNDERSTORMS AND SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.................91-106.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................20-30 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 5 TO 15 MPH IN THE MORNING
BECOMING LIGHT AND VARIABLE IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
30 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................10 PERCENT.
* CHANCE OF THUNDER...............31 PERCENT.
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING.
* MIN TEMPERATURE.................65-83.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................49-70 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH IN THE EVENING
BECOMING NORTH 5 TO 10 MPH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............NORTH 10 TO 15 MPH.
* CHANCE OF PRECIP................30 PERCENT IN THE EVENING
BECOMING 0 PERCENT AFTER MIDNIGHT.
* CWR (>= 0.10 IN)................20 PERCENT.
* CHANCE OF THUNDER...............32 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.................91-105.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................21-31 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHEAST 5 TO 15 MPH IN THE
MORNING BECOMING LIGHT AND VARIABLE IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT IN THE MORNING BECOMING
10 PERCENT IN THE AFTERNOON.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............7 PERCENT.
EXTENDED
FRIDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 65-83. HIGHS 91-107. NORTHEAST WINDS 5 TO
15 MPH.
SATURDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 66-83. HIGHS 92-107. NORTHEAST WINDS 5 TO
15 MPH.
SUNDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 66-83. HIGHS 92-106. WEST WINDS 5 TO 15 MPH.
MONDAY
PARTLY CLOUDY. LOWS 66-82. HIGHS 91-105.
TUESDAY
MOSTLY CLEAR. LOWS 66-83. HIGHS 92-106.
CAZ232-192015-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
102 AM PDT WED AUG 19 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................102-112.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................22-30 PCT.
* 24 HR TREND..................12 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................82-89.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................45-74 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................102-111.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................20-27 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
FRIDAY
MOSTLY CLEAR. LOWS 84-90. HIGHS 103-112. SOUTH WINDS
5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 84-90. HIGHS 103-113. SOUTHWEST
WINDS 5 TO 15 MPH.
SUNDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 82-90. HIGHS 102-111. SOUTH WINDS 5 TO
15 MPH.
MONDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 82-88. HIGHS 100-109.
TUESDAY
MOSTLY CLEAR. LOWS 82-89. HIGHS 101-110.
CAZ230-192015-
JOSHUA TREE NATIONAL PARK-
102 AM PDT WED AUG 19 2026
TODAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................93-106.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................20-29 PCT.
* 24 HR TREND..................10 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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.
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................73-86.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................47-62 PCT.
* 24 HR TREND..................20 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................92-106.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................20-29 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTH 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
FRIDAY
MOSTLY CLEAR. LOWS 73-86. HIGHS 93-106. SOUTHWEST WINDS
5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 73-86. HIGHS 93-107. WEST WINDS
5 TO 15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 72-86. HIGHS 92-106. SOUTHWEST WINDS
10 TO 20 MPH.
MONDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 71-84. HIGHS 90-103.
TUESDAY
MOSTLY CLEAR. LOWS 71-84. HIGHS 91-104.
8 TO 10 DAY OUTLOOK
WEDNESDAY AUGUST 26TH THROUGH FRIDAY
AUGUST 28TH: ABOVE NORMAL TEMPERATURES AND NEAR MEDIAN PRECIPITATION.
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