201
FNUS55 KPSR 042043
FWFPSR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL
ARIZONA AND SOUTHEAST CALIFORNIA
NATIONAL WEATHER SERVICE PHOENIX AZ
143 PM MST WED MAR 4 2026
DISCUSSION
THE WEATHER PATTERN WILL BECOME INCREASINGLY ACTIVE THROUGH THE
REST OF THE WEEK AS A SERIES OF DRY DISTURBANCES CROSS THE
SOUTHWEST. THE CURRENT PASSING SYSTEM CONTINUES TO BRING LIGHT
DIURNAL WINDS WHICH WILL BEGIN TO STRENGTHEN BRINGING BREEZY TO
WINDY CONDITIONS TOMORROW. DRY CONDITIONS WILL PERSIST ACROSS THE
REGION WITH MINIMUM RELATIVE HUMIDITY VALUES STAYING ENTRENCHED
BETWEEN 10-15% THROUGH SATURDAY, WHILE OVERNIGHT RECOVERIES WILL
ONLY REACH THE 30-50% RANGE. WINDS ARE EXPECTED TO STRENGTHEN
SIGNIFICANTLY AFTER SUNRISE THURSDAY, WITH WEST GUSTS OF 25-35
MPH IN THE PHOENIX AREA AND PEAK WNW GUSTS OF 30-45 MPH ACROSS
SOUTHEAST CALIFORNIA, LEADING TO ELEVATED FIRE WEATHER CONCERNS
BEFORE A POTENTIAL SLIGHT INCREASE IN MOISTURE ARRIVES SUNDAY INTO
MONDAY.
..THUNDERSTORMS IMPLY GUSTY WINDS
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.
AZZ132-050845-
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-
143 PM MST WED MAR 4 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................49-59.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................32-50 PCT.
* 24 HR TREND..................7 PCT WETTER.
* 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.
THURSDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................71-79.
* 24 HR TREND..................7 DEGREES COOLER.
* MIN HUMIDITY....................10-14 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 10 TO 20 MPH.
* WINDS...10000 FT MSL............WEST 20 TO 30 MPH IN THE MORNING
BECOMING 30 TO 40 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......8200 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 28 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
THURSDAY NIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................42-52.
* 24 HR TREND..................7 DEGREES COOLER.
* MAX HUMIDITY....................23-38 PCT.
* 24 HR TREND..................10 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 30 TO 40 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
FRIDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................67-74.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................11-15 PCT.
* 24 HR TREND..................LITTLE CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR PHOENIX.......9300 FT AGL.
* TRANSPORT WIND FOR PHOENIX......WEST 13 KNOTS.
* DISPERSION FOR PHOENIX..........EXCELLENT.
EXTENDED
SATURDAY
PARTLY CLOUDY. LOWS 42-57. HIGHS 73-78. NORTHEAST
WINDS 5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS
50-60. HIGHS 74-81. EAST WINDS 10 TO 20 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS
48-58. HIGHS 69-75. SOUTH WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 48-58. HIGHS 73-79.
WEDNESDAY
CLEAR. LOWS 49-59. HIGHS 79-84.
AZZ131-CAZ231-050845-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
143 PM MST WED MAR 4 2026 /1243 PM PST WED MAR 4 2026/
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................50-56.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................45-61 PCT.
* 24 HR TREND..................16 PCT WETTER.
* 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.
THURSDAY
* SKY/WEATHER.....................SUNNY. PATCHY BLOWING DUST.
* MAX TEMPERATURE.................74-79.
* 24 HR TREND..................8 DEGREES COOLER.
* MIN HUMIDITY....................10-14 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 15 TO 25 MPH.
* WINDS...10000 FT MSL............WEST 30 TO 40 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........7000 FT AGL.
* TRANSPORT WIND FOR YUMA.........NORTH 26 KNOTS.
* DISPERSION FOR YUMA.............EXCELLENT.
THURSDAY NIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................44-50.
* 24 HR TREND..................6 DEGREES COOLER.
* MAX HUMIDITY....................26-40 PCT.
* 24 HR TREND..................20 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
FRIDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................71-76.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................11-15 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.
* WINDS...10000 FT MSL............NORTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
* MIXING HEIGHT FOR YUMA..........8400 FT AGL.
* TRANSPORT WIND FOR YUMA.........NORTHWEST 13 KNOTS.
* DISPERSION FOR YUMA.............GOOD.
EXTENDED
SATURDAY
MOSTLY CLEAR. LOWS 45-55. HIGHS 74-79. NORTH WINDS
15 TO 25 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS
50-55. HIGHS 75-80. EAST WINDS 10 TO 20 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS
48-54. HIGHS 73-78. SOUTH WINDS 5 TO 15 MPH.
TUESDAY
CLEAR. LOWS 48-55. HIGHS 77-82.
WEDNESDAY
CLEAR. LOWS 50-58. HIGHS 81-86.
AZZ133-050845-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
143 PM MST WED MAR 4 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................40-53.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................31-47 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 IN THE
EVENING BECOMING 20 TO 30 MPH AFTER MIDNIGHT.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................61-75.
* 24 HR TREND..................4 DEGREES COOLER.
* MIN HUMIDITY....................15-22 PCT.
* 24 HR TREND..................3 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 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............1 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................30-44.
* 24 HR TREND..................9 DEGREES COOLER.
* MAX HUMIDITY....................32-50 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH IN THE EVENING
BECOMING NORTH 5 TO 10 MPH AFTER MIDNIGHT.
* WINDS...10000 FT MSL............WEST 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
FRIDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................54-68.
* 24 HR TREND..................7 DEGREES COOLER.
* MIN HUMIDITY....................12-18 PCT.
* 24 HR TREND..................4 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 10 MPH IN THE MORNING
BECOMING SOUTHWEST IN THE AFTERNOON.
* 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
SATURDAY
PARTLY CLOUDY. LOWS 32-55. HIGHS 61-75. EAST WINDS
10 TO 20 MPH.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS
41-55. HIGHS 65-79. EAST WINDS 15 TO 25 MPH.
MONDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 38-53. HIGHS 57-68. SOUTHWEST WINDS 5 TO
15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 38-52. HIGHS 57-71.
WEDNESDAY
CLEAR. LOWS 38-55. HIGHS 65-78.
CAZ232-050845-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
1243 PM PST WED MAR 4 2026
TONIGHT
* SKY/WEATHER.....................MOSTLY CLEAR.
* MIN TEMPERATURE.................53-59.
* 24 HR TREND..................LITTLE CHANGE.
* MAX HUMIDITY....................39-61 PCT.
* 24 HR TREND..................16 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 10 MPH IN THE
EVENING BECOMING NORTHWEST AFTER MIDNIGHT.
* WINDS...10000 FT MSL............NORTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................SUNNY. PATCHY BLOWING DUST.
* MAX TEMPERATURE.................68-79.
* 24 HR TREND..................9 DEGREES COOLER.
* MIN HUMIDITY....................10-14 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 15 TO 25 MPH.
* WINDS...10000 FT MSL............WEST 25 TO 35 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................48-55.
* 24 HR TREND..................5 DEGREES COOLER.
* MAX HUMIDITY....................24-40 PCT.
* 24 HR TREND..................18 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 10 TO 20 MPH.
* WINDS...10000 FT MSL............NORTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
FRIDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................66-76.
* 24 HR TREND..................3 DEGREES COOLER.
* MIN HUMIDITY....................12-16 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* 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
SATURDAY
BREEZY. MOSTLY CLEAR. LOWS 50-59. HIGHS 70-78. NORTH
WINDS 20 TO 30 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS
52-59. HIGHS 71-79. NORTHEAST WINDS 10 TO 20 MPH.
MONDAY
PARTLY CLOUDY. LOWS 50-58. HIGHS 70-78. SOUTH WINDS
5 TO 15 MPH.
TUESDAY
CLEAR. LOWS 50-58. HIGHS 73-81.
WEDNESDAY
CLEAR. LOWS 52-62. HIGHS 77-84.
CAZ230-050845-
JOSHUA TREE NATIONAL PARK-
1243 PM PST WED MAR 4 2026
TONIGHT
* SKY/WEATHER.....................PARTLY CLOUDY IN THE EVENING
BECOMING CLEAR AFTER MIDNIGHT.
* MIN TEMPERATURE.................41-53.
* 24 HR TREND..................4 DEGREES COOLER.
* MAX HUMIDITY....................41-54 PCT.
* 24 HR TREND..................16 PCT WETTER.
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.
* WINDS...10000 FT MSL............NORTHWEST 20 TO 30 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
THURSDAY
* SKY/WEATHER.....................SUNNY. PATCHY BLOWING DUST.
* MAX TEMPERATURE.................56-69.
* 24 HR TREND..................12 DEGREES COOLER.
* MIN HUMIDITY....................11-15 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..BREEZY. NORTH 20 TO 30 MPH.
* WINDS...10000 FT MSL............WEST 20 TO 30 MPH IN THE MORNING
BECOMING NORTHWEST 35 TO 45 MPH IN THE AFTERNOON.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.....................CLEAR.
* MIN TEMPERATURE.................39-49.
* 24 HR TREND..................3 DEGREES COOLER.
* MAX HUMIDITY....................28-38 PCT.
* 24 HR TREND..................14 PCT DRIER.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 10 TO 20 MPH.
* WINDS...10000 FT MSL............NORTHWEST 30 TO 40 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.
FRIDAY
* SKY/WEATHER.....................SUNNY.
* MAX TEMPERATURE.................55-68.
* 24 HR TREND..................LITTLE CHANGE.
* MIN HUMIDITY....................13-18 PCT.
* 24 HR TREND..................LITTLE RH CHANGE.
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 15 TO 25 MPH.
* WINDS...10000 FT MSL............NORTHWEST 15 TO 25 MPH.
* CHANCE OF PRECIP................0 PERCENT.
* CWR (>= 0.10 IN)................0 PERCENT.
* CHANCE OF THUNDER...............0 PERCENT.
EXTENDED
SATURDAY
BREEZY. MOSTLY CLEAR. LOWS 39-53. HIGHS 59-72. NORTH
WINDS 20 TO 30 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN
15 PERCENT.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS
44-54. HIGHS 62-75. NORTH WINDS 15 TO 25 MPH.
MONDAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS. LOWS 43-54.
HIGHS 63-75. SOUTHWEST WINDS 5 TO 15 MPH.
TUESDAY
CLEAR. LOWS 43-55. HIGHS 64-77.
WEDNESDAY
CLEAR. LOWS 46-58. HIGHS 68-81.
8 TO 10 DAY OUTLOOK
WEDNESDAY MARCH 11TH THROUGH FRIDAY MARCH
13TH: ABOVE NORMAL TEMPERATURES AND NEAR MEDIAN PRECIPITATION.
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