560
FNUS55 KPSR 162232
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
300 PM MST SAT MAY 16 2026
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM MST SUNDAY DUE
TO STRONG WINDS...LOW RELATIVE HUMIDITY AND HIGH FIRE DANGER...
DISCUSSION
A WEATHER SYSTEM HAS MOVED ONSHORE ALONG THE PACIFIC NORTHWEST
AND WILL DEEPEN OVER THE GREAT BASIN RESULTING IN INCREASED WINDS
AND ELEVATED TO LOCALLY CRITICAL FIRE WEATHER CONDITIONS ACROSS
THE AREA THIS WEEKEND. AFTERNOON/EARLY EVENING WIND GUSTS WILL
COMMONLY PEAK BETWEEN 20-35 MPH TODAY, WITH LOCALLY STRONGER
GUSTS IN SOUTHEAST CA. THE STRONGEST GUSTS BY SUNDAY WILL LIKELY
BE CONFINED TO EASTERN AZ HIGHER TERRAIN, WHERE GUSTS BETWEEN
25-40 MPH WILL BE COMMON. A RED FLAG WARNING WILL BE IN EFFECT
STARTING SUNDAY 11 AM MST FOR SOUTHERN GILA COUNTY AND TONTO NF
FOOTHILLS. AFTERNOON MINRHS MOSTLY BETWEEN 8-15% TODAY WILL
INCREASE TO 10-20% AREAWIDE SUNDAY. OVERNIGHT RECOVERIES BETWEEN
30-50% TONIGHT WILL IMPROVE PRIMARILY FOR THE EASTERN DISTRICTS
SUNDAY NIGHT TO AROUND 40-60%.
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-171000-
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-
300 PM MST SAT MAY 16 2026
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................60-70.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................38-55 PCT.
* 24 HR TREND..................12 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SUNDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................86-93.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................13-19 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 10 TO 20 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......10300 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 20 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
SUNDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................58-68.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................41-60 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 10 TO 20 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
MONDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................81-88.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................10-17 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH IN THE
MORNING BECOMING WEST 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 PHOENIX.......9800 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 11 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
EXTENDED
TUESDAY
MOSTLY CLEAR. LOWS 55-66. HIGHS 86-92. SOUTHWEST WINDS
5 TO 10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
WEDNESDAY
MOSTLY CLEAR. LOWS 60-70. HIGHS 90-96. SOUTHWEST
WINDS 5 TO 10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
THURSDAY
CLEAR. LOWS 61-71. HIGHS 92-98. SOUTHWEST WINDS 5 TO
10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
FRIDAY
MOSTLY CLEAR. LOWS 61-71. HIGHS 93-99.
SATURDAY
MOSTLY CLEAR. LOWS 62-72. HIGHS 92-99.
AZZ131-CAZ231-171000-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
300 PM MST SAT MAY 16 2026 /300 PM PDT SAT MAY 16 2026/
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................59-64.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................43-58 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 10 TO 20 MPH IN THE
EVENING BECOMING 5 TO 10 MPH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............WEST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SUNDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................89-94.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................13-19 PCT.
* 24 HR TREND..................3 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 10 MPH IN THE
MORNING BECOMING 10 TO 20 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHWEST 5 TO 15 MPH IN THE
MORNING BECOMING 20 TO 30 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........7500 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTHWEST 15 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
SUNDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................59-64.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................37-50 PCT.
* 24 HR TREND..................8 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 10 TO 20 MPH IN THE
EVENING BECOMING NORTHWEST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............WEST 25 TO 35 MPH IN THE EVENING
BECOMING 15 TO 25 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
MONDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................84-89.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................8-12 PCT.
* 24 HR TREND..................6 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.
* WINDS...10000 FT MSL............WEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........9900 FT AGL.
* TRANSPORT WIND FOR YUMA.........NORTHWEST 8 KNOTS.
* DISPERSION FOR YUMA.............GOOD.
EXTENDED
TUESDAY
MOSTLY CLEAR. LOWS 55-64. HIGHS 89-94. WEST WINDS 5 TO
10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
WEDNESDAY
MOSTLY CLEAR. LOWS 59-66. HIGHS 93-98. SOUTH WINDS
5 TO 10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
THURSDAY
CLEAR. LOWS 61-66. HIGHS 95-100. SOUTH WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
FRIDAY
CLEAR. LOWS 62-67. HIGHS 95-100.
SATURDAY
MOSTLY CLEAR. LOWS 62-67. HIGHS 94-99.
AZZ133-171000-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
300 PM MST SAT MAY 16 2026
..RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM MST SUNDAY
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................49-63.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................35-48 PCT.
* 24 HR TREND..................8 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 10 TO 20 MPH IN THE
EVENING BECOMING SOUTH 5 TO 10 MPH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SUNDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................75-90.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................10-17 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE MORNING
BECOMING SOUTHWEST 10 TO 20 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SUNDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................48-61.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................40-60 PCT.
* 24 HR TREND..................8 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 15 TO 25 MPH IN THE
EVENING BECOMING 5 TO 15 MPH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............SOUTHWEST 35 TO 45 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
MONDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................70-84.
* 24 HR TREND..................6 DEGREES COOLER.
* MIN HUMIDITY....................15-23 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 30 TO 40 MPH IN THE
MORNING BECOMING 20 TO 30 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
TUESDAY
MOSTLY CLEAR. LOWS 45-63. HIGHS 75-89. SOUTHWEST WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
WEDNESDAY
PARTLY CLOUDY. LOWS 48-64. HIGHS 78-92. SOUTHWEST
WINDS 5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
THURSDAY
MOSTLY CLEAR. LOWS 48-64. HIGHS 80-94. WEST WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
FRIDAY
MOSTLY CLEAR. LOWS 49-66. HIGHS 81-95.
SATURDAY
MOSTLY CLEAR. LOWS 51-66. HIGHS 81-95.
CAZ232-171000-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
300 PM PDT SAT MAY 16 2026
TONIGHT
* SKY/WEATHER.....................CLEAR. PATCHY BLOWING DUST IN THE
EVENING.
* MIN TEMPERATURE.................60-68.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................34-60 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 10 TO 20 MPH.
* WINDS...10000 FT MSL............WEST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SUNDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................83-93.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................13-23 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 10 MPH IN THE
MORNING BECOMING 10 TO 20 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............WEST 5 TO 15 MPH IN THE MORNING
BECOMING 20 TO 30 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SUNDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR. PATCHY BLOWING DUST
IN THE EVENING.
* MIN TEMPERATURE.................59-67.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................26-52 PCT.
* 24 HR TREND..................7 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 15 TO 25 MPH.
* WINDS...10000 FT MSL............WEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
MONDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................79-87.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................6-11 PCT.
* 24 HR TREND..................9 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.
* WINDS...10000 FT MSL............WEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
TUESDAY
MOSTLY CLEAR. LOWS 59-70. HIGHS 85-94. NORTH WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
WEDNESDAY
MOSTLY CLEAR. LOWS 62-70. HIGHS 89-98. SOUTH WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
THURSDAY
CLEAR. LOWS 64-71. HIGHS 91-99. SOUTH WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
FRIDAY
CLEAR. LOWS 64-71. HIGHS 90-100.
SATURDAY
CLEAR. LOWS 64-71. HIGHS 90-98.
CAZ230-171000-
JOSHUA TREE NATIONAL PARK-
300 PM PDT SAT MAY 16 2026
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................50-64.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................33-51 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 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.
SUNDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................73-88.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................16-28 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 10 MPH IN THE
MORNING BECOMING SOUTHWEST 10 TO 20 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............WEST 5 TO 15 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.
SUNDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................47-63.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................27-55 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..BREEZY. WEST 10 TO 20 MPH IN THE
EVENING BECOMING NORTHWEST 20 TO 30 MPH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............WEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
MONDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................68-80.
* 24 HR TREND..................6 DEGREES COOLER.
* MIN HUMIDITY....................7-11 PCT.
* 24 HR TREND..................12 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 15 TO 25 MPH IN THE MORNING
BECOMING 5 TO 15 MPH IN THE AFTERNOON.
* 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
TUESDAY
MOSTLY CLEAR. LOWS 49-64. HIGHS 74-88. NORTHWEST WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
WEDNESDAY
CLEAR. LOWS 54-66. HIGHS 80-92. WEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
THURSDAY
CLEAR. LOWS 56-67. HIGHS 82-94. SOUTHWEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
FRIDAY
CLEAR. LOWS 56-67. HIGHS 81-94.
SATURDAY
CLEAR. LOWS 55-67. HIGHS 80-93.
8 TO 10 DAY OUTLOOK
SUNDAY MAY 24TH THROUGH TUESDAY MAY 26TH:
ABOVE NORMAL TEMPERATURES AND NEAR MEDIAN PRECIPITATION.
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