521
FNUS55 KPSR 161024
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
324 AM MST SAT MAY 16 2026
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM MST SUNDAY DUE
TO STRONG WINDS, LOW HUMIDITY, AND HIGH FIRE DANGER FOR SOUTHERN
GILA COUNTY AND TONTO NATIONAL FOREST FOOTHILLS EAST OF PHOENIX...
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.
AZZ132-162230-
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-
324 AM MST SAT MAY 16 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................91-98.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................9-15 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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.
* MIXING HEIGHT FOR PHOENIX.......11800 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 19 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................60-70.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................38-54 PCT.
* 24 HR TREND..................12 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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.
SUNDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................86-93.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................13-20 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 10 TO 20 MPH.
* 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.
* MIXING HEIGHT FOR PHOENIX.......9400 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 21 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
EXTENDED
MONDAY
CLEAR. LOWS 56-66. HIGHS 81-88. SOUTHWEST WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
TUESDAY
MOSTLY CLEAR. LOWS 56-66. HIGHS 87-92. SOUTHWEST WINDS
5 TO 10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
WEDNESDAY
MOSTLY CLEAR. LOWS 60-70. HIGHS 91-97. SOUTHWEST
WINDS 5 TO 10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
THURSDAY
CLEAR. LOWS 61-71. HIGHS 94-99.
FRIDAY
MOSTLY CLEAR. LOWS 63-73. HIGHS 94-100.
AZZ131-CAZ231-162230-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
324 AM MST SAT MAY 16 2026 /324 AM PDT SAT MAY 16 2026/
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................93-98.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................11-16 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 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 YUMA..........10000 FT AGL.
* TRANSPORT WIND FOR YUMA.........WEST 16 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................59-64.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................44-58 PCT.
* 24 HR TREND..................4 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..................5 DEGREES COOLER.
* MIN HUMIDITY....................14-20 PCT.
* 24 HR TREND..................4 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 10 TO 20 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 MPH IN THE
MORNING BECOMING WEST 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..........8100 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTHWEST 16 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
EXTENDED
MONDAY
BREEZY, CLEAR. LOWS 56-64. HIGHS 84-89. NORTHWEST WINDS
20 TO 30 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
TUESDAY
MOSTLY CLEAR. LOWS 56-65. HIGHS 89-94. WEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
WEDNESDAY
MOSTLY CLEAR. LOWS 59-66. HIGHS 94-99. SOUTH WINDS
5 TO 10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
THURSDAY
CLEAR. LOWS 61-67. HIGHS 96-101.
FRIDAY
MOSTLY CLEAR. LOWS 63-68. HIGHS 96-101.
AZZ133-162230-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
324 AM MST SAT MAY 16 2026
..RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM MST SUNDAY
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................79-94.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................8-12 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................49-64.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................33-47 PCT.
* 24 HR TREND..................7 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 15 TO 25 MPH IN THE
MORNING BECOMING 25 TO 35 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
MONDAY
CLEAR. LOWS 45-61. HIGHS 70-84. SOUTHWEST WINDS 15 TO
25 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 45-64. HIGHS 75-89. SOUTHWEST WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
WEDNESDAY
PARTLY CLOUDY. LOWS 48-65. HIGHS 79-93. NORTHWEST
WINDS 5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
THURSDAY
MOSTLY CLEAR. LOWS 49-66. HIGHS 81-96.
FRIDAY
MOSTLY CLEAR. LOWS 50-67. HIGHS 82-96.
CAZ232-162230-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
324 AM PDT SAT MAY 16 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................87-97.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................11-20 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 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.
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................60-68.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................34-62 PCT.
* 24 HR TREND..................3 PCT WETTER.
* 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.....................SUNNY.
* MAX TEMPERATURE.................84-93.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................13-23 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............WEST 10 TO 20 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
MONDAY
BREEZY, CLEAR. LOWS 59-67. HIGHS 79-88. NORTHWEST WINDS
20 TO 30 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
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 63-71. HIGHS 90-98. SOUTH WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
THURSDAY
CLEAR. LOWS 64-71. HIGHS 92-100.
FRIDAY
MOSTLY CLEAR. LOWS 65-71. HIGHS 91-100.
CAZ230-162230-
JOSHUA TREE NATIONAL PARK-
324 AM PDT SAT MAY 16 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................76-92.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................10-23 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 5 TO 15 MPH IN THE MORNING
BECOMING NORTHWEST IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
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............SOUTHEAST 5 TO 15 MPH IN THE
EVENING BECOMING SOUTHWEST AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SUNDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................74-88.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................16-27 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE MORNING
BECOMING SOUTHWEST 10 TO 20 MPH IN THE AFTERNOON.
* WINDS...10000 FT MSL............SOUTHWEST 5 TO 15 MPH IN THE
MORNING BECOMING WEST 15 TO 25 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
MONDAY
BREEZY, CLEAR. LOWS 48-63. HIGHS 68-81. NORTH WINDS
20 TO 30 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
TUESDAY
MOSTLY CLEAR. LOWS 50-64. HIGHS 75-88. NORTHWEST WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
WEDNESDAY
CLEAR. LOWS 55-66. HIGHS 81-93. NORTHWEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
THURSDAY
CLEAR. LOWS 57-68. HIGHS 83-95.
FRIDAY
MOSTLY CLEAR. LOWS 56-68. HIGHS 82-94.
8 TO 10 DAY OUTLOOK
SATURDAY MAY 23RD THROUGH MONDAY MAY 25TH:
NEAR NORMAL TEMPERATURES AND NEAR MEDIAN PRECIPITATION.
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