115
FNUS55 KPSR 282129
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
ISSUED BY NATIONAL WEATHER SERVICE TUCSON AZ
228 PM MST MON APR 28 2025
DISCUSSION
BELOW NORMAL TEMPERATURES TODAY WILL RESULT IN MINIMUM RH VALUES
ABOVE 15%, HOWEVER WARMING CONDITIONS THE REST OF THE WEEK, BACK TO
SLIGHTLY ABOVE NORMAL BY WEDNESDAY, WILL DROP MINIMUM RH VALUES BACK
DOWN TO AROUND 10-15% EACH AFTERNOON THROUGH AT LEAST FRIDAY. A COOL
WEATHER SYSTEM WILL THEN APPROACH AND MOVE THROUGH THE REGION THIS
WEEKEND. THIS WILL BRING MINIMUM RH VALUES BACK ABOVE CRITICAL
LEVELS. HOWEVER, THIS SYSTEM WILL ALSO BRING INCREASED GRADIENT
WINDS ACROSS THE AREA AND IT LOOKS AS THOUGH THERE WILL BE A PERIOD
OF AT LEAST ELEVATED FIRE WEATHER CONDITIONS FOR SOUTH-CENTRAL AZ
SATURDAY AFTERNOON. WINDS WILL MAINTAIN SEASONALLY TYPICAL UPSLOPE
GUSTINESS IN THE AFTERNOON THROUGH THE ENTIRE WEEK WITH LIKELY
STRONGER GUSTS ARRIVING THIS WEEKEND. PREDICTIVE SERVICES STILL SHOW
ERCS ARE BELOW THE 75TH PERCENTILE, WHICH SHOULD HELP LIMIT THE
LARGE FIRE RISK.
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-290930-
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-
229 PM MST MON APR 28 2025
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................53-63.
* 24 HR TREND..................5 DEGREES WARMER.
* MAX HUMIDITY....................33-47 PCT.
* 24 HR TREND..................10 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
TUESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................82-88.
* 24 HR TREND..................7 DEGREES WARMER.
* MIN HUMIDITY....................10-14 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......11900 FT AGL.
* TRANSPORT WIND FOR PHOENIX......NORTHWEST 11 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................56-66.
* 24 HR TREND..................3 DEGREES WARMER.
* MAX HUMIDITY....................34-46 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 15 TO 25 MPH IN THE
EVENING BECOMING 5 TO 15 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................85-91.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................11-15 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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.
* MIXING HEIGHT FOR PHOENIX.......11000 FT AGL.
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 9 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
EXTENDED
THURSDAY
MOSTLY CLEAR. LOWS 57-67. HIGHS 85-93. SOUTH WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
FRIDAY
MOSTLY CLEAR. LOWS 57-67. HIGHS 86-92. SOUTH WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
CLEAR. LOWS 51-63. HIGHS 85-92. SOUTH WINDS 15 TO
25 MPH.
SUNDAY
NOT AS WARM. MOSTLY CLEAR. LOWS 48-59. HIGHS 69-77.
MONDAY
MOSTLY CLEAR. LOWS 48-58. HIGHS 71-78.
AZZ131-CAZ231-290930-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
229 PM MST MON APR 28 2025 /229 PM PDT MON APR 28 2025/
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................53-58.
* 24 HR TREND..................6 DEGREES WARMER.
* MAX HUMIDITY....................40-64 PCT.
* 24 HR TREND..................16 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
TUESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................86-91.
* 24 HR TREND..................8 DEGREES WARMER.
* MIN HUMIDITY....................10-14 PCT.
* 24 HR TREND..................6 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* MIXING HEIGHT FOR YUMA..........12700 FT AGL.
* TRANSPORT WIND FOR YUMA.........WEST 8 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................57-62.
* 24 HR TREND..................4 DEGREES WARMER.
* MAX HUMIDITY....................41-58 PCT.
* 24 HR TREND..................3 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 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.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................89-94.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................12-16 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 IN THE MORNING
BECOMING SOUTHWEST 15 TO 25 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* MIXING HEIGHT FOR YUMA..........9500 FT AGL.
* TRANSPORT WIND FOR YUMA.........SOUTH 16 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
EXTENDED
THURSDAY
MOSTLY CLEAR. LOWS 58-63. HIGHS 88-93. SOUTH WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
FRIDAY
CLEAR. LOWS 58-63. HIGHS 88-93. SOUTH WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
BREEZY, CLEAR. LOWS 53-63. HIGHS 87-92. SOUTH WINDS
20 TO 30 MPH.
SUNDAY
NOT AS WARM. MOSTLY CLEAR. LOWS 50-56. HIGHS 72-77.
MONDAY
MOSTLY CLEAR. LOWS 50-56. HIGHS 76-81.
AZZ133-290930-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
229 PM MST MON APR 28 2025
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................40-54.
* 24 HR TREND..................4 DEGREES WARMER.
* MAX HUMIDITY....................33-45 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE EVENING
BECOMING NORTH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............WEST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
TUESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................67-82.
* 24 HR TREND..................3 DEGREES WARMER.
* MIN HUMIDITY....................11-17 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................43-57.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................37-54 PCT.
* 24 HR TREND..................5 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE EVENING
BECOMING NORTHEAST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............NORTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................71-86.
* 24 HR TREND..................4 DEGREES WARMER.
* MIN HUMIDITY....................11-17 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............WEST 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
EXTENDED
THURSDAY
PARTLY CLOUDY. LOWS 47-60. HIGHS 74-88. SOUTHWEST
WINDS 5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
FRIDAY
MOSTLY CLEAR. LOWS 46-60. HIGHS 75-88. SOUTHWEST WINDS
10 TO 20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SATURDAY
CLEAR. LOWS 46-60. HIGHS 74-88. SOUTH WINDS 15 TO
25 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SUNDAY
COOLER. MOSTLY CLEAR. LOWS 37-57. HIGHS 61-73.
MONDAY
MOSTLY CLEAR. LOWS 37-51. HIGHS 58-72.
CAZ232-290930-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
229 PM PDT MON APR 28 2025
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................56-63.
* 24 HR TREND..................7 DEGREES WARMER.
* MAX HUMIDITY....................34-64 PCT.
* 24 HR TREND..................15 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
TUESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................82-92.
* 24 HR TREND..................9 DEGREES WARMER.
* MIN HUMIDITY....................10-16 PCT.
* 24 HR TREND..................6 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................59-66.
* 24 HR TREND..................3 DEGREES WARMER.
* MAX HUMIDITY....................31-55 PCT.
* 24 HR TREND..................5 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 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.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................84-94.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................10-16 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
EXTENDED
THURSDAY
MOSTLY CLEAR. LOWS 59-65. HIGHS 83-92. SOUTHWEST
WINDS 5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
FRIDAY
CLEAR. LOWS 59-66. HIGHS 85-94. SOUTHWEST WINDS 5 TO
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.
SATURDAY
BREEZY. MOSTLY CLEAR. LOWS 51-66. HIGHS 81-91.
SOUTHWEST WINDS 20 TO 30 MPH.
SUNDAY
NOT AS WARM. MOSTLY CLEAR. LOWS 50-58. HIGHS 67-76.
MONDAY
MOSTLY CLEAR. LOWS 50-59. HIGHS 71-80.
CAZ230-290930-
JOSHUA TREE NATIONAL PARK-
229 PM PDT MON APR 28 2025
TONIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................49-59.
* 24 HR TREND..................10 DEGREES WARMER.
* MAX HUMIDITY....................35-45 PCT.
* 24 HR TREND..................23 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTH 10 TO 20 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
TUESDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................73-85.
* 24 HR TREND..................7 DEGREES WARMER.
* MIN HUMIDITY....................11-17 PCT.
* 24 HR TREND..................6 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 10 TO 15 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
TUESDAY NIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................51-61.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................31-41 PCT.
* 24 HR TREND..................4 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 5 TO 15 MPH IN THE
EVENING BECOMING SOUTHWEST AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
WEDNESDAY
* SKY/WEATHER.....................MOSTLY SUNNY.
* MAX TEMPERATURE.................73-87.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................12-20 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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.
EXTENDED
THURSDAY
MOSTLY CLEAR. LOWS 51-62. HIGHS 73-86. WEST WINDS
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
FRIDAY
CLEAR. LOWS 51-62. HIGHS 75-88. WEST WINDS 5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 39-62. HIGHS 69-85. SOUTHWEST
WINDS 15 TO 25 MPH.
SUNDAY
COOLER. MOSTLY CLEAR. LOWS 39-51. HIGHS 56-70.
MONDAY
MOSTLY CLEAR. LOWS 39-54. HIGHS 61-74.
8 TO 10 DAY OUTLOOK
MONDAY MAY 5TH THROUGH WEDNESDAY MAY 7TH:
BELOW NORMAL TEMPERATURES AND ABOVE MEDIAN PRECIPITATION.
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