886
FNUS55 KPSR 170954
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
254 AM MST FRI APR 17 2026
...ELEVATED TO LOCALLY CRITICAL FIRE WEATHER CONDITIONS EXPECTED
LATE THIS MORNING INTO THE EARLY AFTERNOON FOR THE LOWER COLORADO
RIVER VALLEY FOR STRONG WINDS AND VERY LOW HUMIDITY...
DISCUSSION
DRY CONDITIONS WILL PREVAIL THROUGH THE WEEKEND, WITH NEAR TO
SLIGHTLY BELOW NORMAL TEMPERATURES TODAY WARMING INTO AN ABOVE
NORMAL CATEGORY OVER THE NEXT COUPLE DAYS. WIND SPEEDS WITH GUSTS
PEAKING 30-45 MPH WILL BE OBSERVED LATER THIS MORNING, MAINLY FOR
PORTIONS OF SE CALIFORNIA AND FAR WESTERN ARIZONA, GENERATING
ELEVATED TO LOCALLY CRITICAL FIRE WEATHER CONDITIONS DURING THE
LATE MORNING INTO THE EARLY AFTERNOON. AFTERNOON MINRHS WILL BE
VERY LOW (5-10%) FOR THE WESTERN DISTRICTS TODAY, WITH OVERNIGHT
RECOVERY HEADING INTO SATURDAY OFFERING VERY LITTLE RELIEF FOR
THESE AREAS AS RHS WILL ONLY RISE TO AROUND 10-20%. WINDS WILL BE
MUCH LIGHTER SATURDAY AREAWIDE, WITH SPEEDS GENERALLY BELOW 15
MPH.
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-172200-
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-
254 AM MST FRI APR 17 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................78-85.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................7-15 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 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.
* MIXING HEIGHT FOR PHOENIX.......9500 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 8 KNOTS.
* DISPERSION FOR PHOENIX..........VERY GOOD.
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................49-59.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................11-28 PCT.
* 24 HR TREND..................29 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SATURDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................85-91.
* 24 HR TREND..................6 DEGREES WARMER.
* MIN HUMIDITY....................6-10 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHEAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE MORNING
BECOMING SOUTHEAST 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......8900 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHEAST 3 KNOTS.
* DISPERSION FOR PHOENIX..........FAIR.
EXTENDED
SUNDAY
PARTLY CLOUDY. LOWS 57-67. HIGHS 89-96. SOUTHEAST WINDS
10 TO 20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
MONDAY
MOSTLY CLEAR. LOWS 57-67. HIGHS 88-95. SOUTH WINDS
10 TO 20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
TUESDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 87-95. SOUTH WINDS
10 TO 20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
WEDNESDAY
MOSTLY CLEAR. LOWS 52-62. HIGHS 79-86.
THURSDAY
MOSTLY CLEAR. LOWS 51-61. HIGHS 79-86.
AZZ131-CAZ231-172200-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
254 AM MST FRI APR 17 2026 /254 AM PDT FRI APR 17 2026/
TODAY
* SKY/WEATHER.....................SUNNY. PATCHY BLOWING DUST.
* MAX TEMPERATURE.................79-84.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................5-9 PCT.
* 24 HR TREND..................9 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 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.
* MIXING HEIGHT FOR YUMA..........7900 FT AGL.
* TRANSPORT WIND FOR YUMA.........NORTH 19 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................48-56.
* 24 HR TREND..................4 DEGREES COOLER.
* MAX HUMIDITY....................10-21 PCT.
* 24 HR TREND..................30 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 5 TO 15 MPH IN THE
EVENING BECOMING LIGHT AND VARIABLE AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SATURDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................86-91.
* 24 HR TREND..................7 DEGREES WARMER.
* MIN HUMIDITY....................6-10 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE MORNING
BECOMING SOUTHEAST 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........7600 FT AGL.
* TRANSPORT WIND FOR YUMA.........EAST 4 KNOTS.
* DISPERSION FOR YUMA.............POOR.
EXTENDED
SUNDAY
PARTLY CLOUDY. LOWS 54-63. HIGHS 91-96. SOUTHEAST WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
MONDAY
CLEAR. LOWS 57-63. HIGHS 89-94. SOUTH WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
TUESDAY
CLEAR. LOWS 56-61. HIGHS 88-93. SOUTHWEST WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
WEDNESDAY
MOSTLY CLEAR. LOWS 53-61. HIGHS 80-85.
THURSDAY
MOSTLY CLEAR. LOWS 52-57. HIGHS 81-86.
AZZ133-172200-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
254 AM MST FRI APR 17 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................67-81.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................13-20 PCT.
* 24 HR TREND..................6 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 15 TO 25 MPH IN THE MORNING
BECOMING 5 TO 15 MPH 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.................39-56.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................25-35 PCT.
* 24 HR TREND..................12 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 10 MPH IN THE
EVENING BECOMING NORTHEAST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............WEST 5 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SATURDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................73-88.
* 24 HR TREND..................6 DEGREES WARMER.
* MIN HUMIDITY....................7-11 PCT.
* 24 HR TREND..................7 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE MORNING
BECOMING SOUTHEAST 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
SUNDAY
BREEZY. PARTLY CLOUDY. LOWS 46-64. HIGHS 72-89. EAST
WINDS 20 TO 30 MPH.
MONDAY
MOSTLY CLEAR. LOWS 47-64. HIGHS 74-90. SOUTH WINDS
10 TO 20 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 46-62. HIGHS 76-91. SOUTH WINDS
10 TO 20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
WEDNESDAY
MOSTLY CLEAR. LOWS 42-59. HIGHS 70-84.
THURSDAY
MOSTLY CLEAR. LOWS 39-56. HIGHS 67-81.
CAZ232-172200-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
254 AM PDT FRI APR 17 2026
TODAY
* SKY/WEATHER.....................SUNNY. PATCHY BLOWING DUST IN THE
MORNING.
* MAX TEMPERATURE.................74-83.
* 24 HR TREND..................5 DEGREES COOLER.
* MIN HUMIDITY....................4-9 PCT.
* 24 HR TREND..................6 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 15 TO 25 MPH.
* WINDS...10000 FT MSL............NORTHWEST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................52-59.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................9-28 PCT.
* 24 HR TREND..................25 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 5 TO 15 MPH IN THE
EVENING BECOMING LIGHT AND VARIABLE AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SATURDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................81-89.
* 24 HR TREND..................6 DEGREES WARMER.
* MIN HUMIDITY....................5-9 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE MORNING
BECOMING SOUTH 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
SUNDAY
PARTLY CLOUDY. LOWS 57-64. HIGHS 86-95. WEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
MONDAY
CLEAR. LOWS 57-64. HIGHS 84-93. SOUTH WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
TUESDAY
MOSTLY CLEAR. LOWS 55-62. HIGHS 82-91. SOUTHWEST WINDS
15 TO 25 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 54-62. HIGHS 75-84.
THURSDAY
MOSTLY CLEAR. LOWS 54-61. HIGHS 76-85.
CAZ230-172200-
JOSHUA TREE NATIONAL PARK-
254 AM PDT FRI APR 17 2026
TODAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................62-76.
* 24 HR TREND..................6 DEGREES COOLER.
* MIN HUMIDITY....................5-9 PCT.
* 24 HR TREND..................6 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 15 TO 25 MPH.
* WINDS...10000 FT MSL............NORTHWEST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................43-53.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................10-14 PCT.
* 24 HR TREND..................30 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 10 TO 20 MPH IN THE
EVENING BECOMING LIGHT AND VARIABLE AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
SATURDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................70-83.
* 24 HR TREND..................8 DEGREES WARMER.
* MIN HUMIDITY....................4-8 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH IN THE MORNING
BECOMING EAST IN THE AFTERNOON.
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE MORNING
BECOMING SOUTH 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
SUNDAY
PARTLY CLOUDY. LOWS 49-60. HIGHS 75-89. SOUTHWEST WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
MONDAY
CLEAR. LOWS 47-60. HIGHS 74-88. SOUTHWEST WINDS 10 TO
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
TUESDAY
MOSTLY CLEAR. LOWS 43-57. HIGHS 70-86. SOUTHWEST WINDS
15 TO 25 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 43-55. HIGHS 64-79.
THURSDAY
MOSTLY CLEAR. LOWS 43-55. HIGHS 65-80.
8 TO 10 DAY OUTLOOK
FRIDAY APRIL 24TH THROUGH SATURDAY APRIL
26TH: NEAR NORMAL TEMPERATURES AND NEAR MEDIAN PRECIPITATION.
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