810 
FNUS55 KPSR 250826
FWFPSR

Fire Weather Planning Forecast for Southwest and South-Central
Arizona and Southeast California
National Weather Service Phoenix AZ
126 AM MST Thu Sep 25 2025

.DISCUSSION...
Today will bring more hot temperatures to the lower deserts, but
moisture will be on the increase. Expect isolated to scattered 
thunderstorms over the eastern districts starting this afternoon
with outflow easterly winds into the south-central Arizona lower
deserts. MinRH values will hover around 20% today across the lower
deserts before increasing Friday into Saturday with values 
upwards of 50% over the eastern districts. Friday is expected to
bring fairly widespread showers and thunderstorms across the
eastern districts with heavy rainfall likely in some areas.

...Thunderstorms imply gusty winds...

Note...Additional Fire Weather Forecast information can be found
in the Area Forecast Discussion. See product PHXAFDPSR.

AZZ132-252030-
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-
126 AM MST Thu Sep 25 2025

.TODAY...
* Sky/weather.....................Sunny. 
* Max Temperature.................98-106. 
*    24 hr trend..................Little change. 
* Min Humidity....................19-24 pct. 
*    24 hr trend..................4 pct wetter. 
* Winds - 20 foot...Slope/Valley..Southeast 5 to 10 mph in the 
  morning becoming southwest 5 to 15 mph in the afternoon. 
* Winds...10000 FT MSL............South 15 to 25 mph. 
* Chance of Precip................0 percent. 
* CWR (>= 0.10 IN)................0 percent. 
* Chance of Thunder...............3 percent. 
* Mixing Height for Phoenix.......12700 ft AGL. 
* Transport Wind for Phoenix......Southwest 16 knots. 
* Dispersion for Phoenix..........Excellent. 

.TONIGHT...
* Sky/weather.....................Mostly clear. Slight chance of 
  showers and thunderstorms. 
* Min Temperature.................70-80. 
*    24 hr trend..................6 degrees cooler. 
* Max Humidity....................46-66 pct. 
*    24 hr trend..................16 pct wetter. 
* Winds - 20 foot...Slope/Valley..South 5 to 15 mph. 
* Winds...10000 FT MSL............Southwest 20 to 30 mph. 
* Chance of Precip................10 percent. 
* CWR (>= 0.10 IN)................0 percent. 
* Chance of Thunder...............7 percent. 

.FRIDAY...
* Sky/weather.....................Partly sunny. Chance of 
  thunderstorms in the morning. chance of showers . slight chance 
  of thunderstorms in the afternoon. 
* Max Temperature.................87-94. 
*    24 hr trend..................12 degrees cooler. 
* Min Humidity....................22-41 pct. 
*    24 hr trend..................9 pct wetter. 
* Winds - 20 foot...Slope/Valley..South 5 to 15 mph. 
* Winds...10000 FT MSL............South 20 to 30 mph. 
* Chance of Precip................30 percent. 
* CWR (>= 0.10 IN)................0 percent west portion...40 
  percent east portion. 
* Chance of Thunder...............16 percent. 
* Mixing Height for Phoenix.......10000 ft AGL. 
* Transport Wind for Phoenix......South 14 knots. 
* Dispersion for Phoenix..........Excellent. 


.EXTENDED...
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows 66-76. Highs 84-91. Southeast winds
5 to 15 mph. 
.SUNDAY...Mostly clear with slight chance of showers and
thunderstorms. Lows 66-76. Highs 84-91. Southeast winds 5 to
10 mph. 
.MONDAY...Clear. Lows 66-76. Highs 87-94. Southeast winds 5 to
10 mph. 
.TUESDAY...Mostly clear. Lows 67-77. Highs 89-96. 
.WEDNESDAY...Mostly clear. Lows 66-76. Highs 88-95. 

$$

AZZ131-CAZ231-252030-
Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ-
Lower Colorado River Valley CA-
126 AM MST Thu Sep 25 2025 /126 AM PDT Thu Sep 25 2025/

.TODAY...
* Sky/weather.....................Sunny. 
* Max Temperature.................99-104. 
*    24 hr trend..................3 degrees cooler. 
* Min Humidity....................16-21 pct. 
*    24 hr trend..................3 pct drier. 
* Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. 
* Winds...10000 FT MSL............South 25 to 35 mph. 
* Chance of Precip................0 percent. 
* CWR (>= 0.10 IN)................0 percent. 
* Chance of Thunder...............0 percent. 
* Mixing Height for Yuma..........7200 ft AGL. 
* Transport Wind for Yuma.........Southwest 9 knots. 
* Dispersion for Yuma.............Good. 

.TONIGHT...
* Sky/weather.....................Clear. 
* Min Temperature.................68-73. 
*    24 hr trend..................8 degrees cooler. 
* Max Humidity....................46-64 pct. 
*    24 hr trend..................Little RH change. 
* Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. 
* Winds...10000 FT MSL............South 25 to 35 mph. 
* Chance of Precip................0 percent. 
* CWR (>= 0.10 IN)................0 percent. 
* Chance of Thunder...............0 percent. 

.FRIDAY...
* Sky/weather.....................Mostly sunny. Slight chance of 
  showers in the afternoon. 
* Max Temperature.................89-94. 
*    24 hr trend..................9 degrees cooler. 
* Min Humidity....................24-31 pct. 
*    24 hr trend..................8 pct wetter. 
* Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. 
* Winds...10000 FT MSL............South 15 to 25 mph in the morning 
  becoming southeast 5 to 15 mph in the afternoon. 
* Chance of Precip................0 percent in the morning becoming 
  10 percent in the afternoon. 
* CWR (>= 0.10 IN)................0 percent. 
* Chance of Thunder...............1 percent. 
* Mixing Height for Yuma..........8600 ft AGL. 
* Transport Wind for Yuma.........West 8 knots. 
* Dispersion for Yuma.............Fair. 


.EXTENDED...
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows 67-74. Highs 87-92. Southeast winds
5 to 15 mph. 
.SUNDAY...Mostly clear with slight chance of showers and
thunderstorms. Lows 67-73. Highs 87-92. Southeast winds 5 to
10 mph. 
.MONDAY...Clear. Lows 68-73. Highs 91-96. South winds 5 to
10 mph. 
.TUESDAY...Mostly clear. Lows 66-73. Highs 91-96. 
.WEDNESDAY...Mostly clear. Lows 66-71. Highs 90-95. 

$$

AZZ133-252030-
Southern Gila County/Tonto National Forest Foothills-
Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/
CAZ-
126 AM MST Thu Sep 25 2025

.TODAY...
* Sky/weather.....................Sunny in the morning becoming 
  partly sunny in the afternoon. Chance of showers and 
  thunderstorms in the afternoon. 
* Max Temperature.................84-101. 
*    24 hr trend..................Little change. 
* Min Humidity....................25-36 pct. 
*    24 hr trend..................10 pct wetter. 
* Winds - 20 foot...Slope/Valley..East 5 to 15 mph in the morning 
  becoming south in the afternoon. 
* Winds...10000 FT MSL............Southwest 10 to 20 mph. 
* Chance of Precip................0 percent in the morning becoming 
  50 percent in the afternoon. 
* CWR (>= 0.10 IN)................20 percent. 
* Chance of Thunder...............50 percent. 

.TONIGHT...
* Sky/weather.....................Mostly cloudy in the evening 
  becoming partly cloudy after midnight. Chance of showers and 
  thunderstorms. 
* Min Temperature.................56-71. 
*    24 hr trend..................6 degrees cooler. 
* Max Humidity....................65-90 pct. 
*    24 hr trend..................24 pct wetter. 
* Winds - 20 foot...Slope/Valley..East 5 to 15 mph. 
* Winds...10000 FT MSL............Southwest 20 to 30 mph. 
* Chance of Precip................60 percent. 
* CWR (>= 0.10 IN)................40 percent. 
* Chance of Thunder...............51 percent. 

.FRIDAY...
* Sky/weather.....................Mostly cloudy. Showers likely and 
  chance of thunderstorms in the morning becoming showers with 
  thunderstorms likely in the afternoon. 
* Max Temperature.................74-88. 
*    24 hr trend..................12 degrees cooler. 
* Min Humidity....................39-57 pct. 
*    24 hr trend..................19 pct wetter. 
* Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. 
* Winds...10000 FT MSL............South 20 to 30 mph. 
* Chance of Precip................80 percent. 
* CWR (>= 0.10 IN)................80 percent. 
* Chance of Thunder...............60 percent. 


.EXTENDED...
.SATURDAY...Partly cloudy with chance of showers and
thunderstorms. Lows 53-69. Highs 71-85. Southeast winds 5 to
15 mph. 
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows 52-67. Highs 71-85. Southeast winds 5 to
10 mph. 
.MONDAY...Mostly clear. Lows 52-69. Highs 74-89. East winds 5 to
15 mph. 
.TUESDAY...Mostly clear. Lows 54-69. Highs 76-91. 
.WEDNESDAY...Mostly clear. Lows 54-69. Highs 77-91. 

$$

CAZ232-252030-
Imperial County And Eastern Riverside County-
126 AM PDT Thu Sep 25 2025

.TODAY...
* Sky/weather.....................Sunny. 
* Max Temperature.................92-102. 
*    24 hr trend..................3 degrees cooler. 
* Min Humidity....................13-21 pct. 
*    24 hr trend..................7 pct drier. 
* Winds - 20 foot...Slope/Valley..West 5 to 15 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. 

.TONIGHT...
* Sky/weather.....................Clear. 
* Min Temperature.................67-74. 
*    24 hr trend..................7 degrees cooler. 
* Max Humidity....................46-64 pct. 
*    24 hr trend..................5 pct wetter. 
* Winds - 20 foot...Slope/Valley..West 5 to 15 mph. 
* Winds...10000 FT MSL............Southwest 20 to 30 mph in the 
  evening becoming 10 to 20 mph after midnight. 
* Chance of Precip................0 percent. 
* CWR (>= 0.10 IN)................0 percent. 
* Chance of Thunder...............0 percent. 

.FRIDAY...
* Sky/weather.....................Mostly sunny. Slight chance of 
  showers in the afternoon. 
* Max Temperature.................85-94. 
*    24 hr trend..................8 degrees cooler. 
* Min Humidity....................23-35 pct. 
*    24 hr trend..................11 pct wetter. 
* Winds - 20 foot...Slope/Valley..West 5 to 15 mph. 
* Winds...10000 FT MSL............Light and variable in the morning 
  becoming northeast 5 to 15 mph in the afternoon. 
* Chance of Precip................0 percent. 
* CWR (>= 0.10 IN)................0 percent. 
* Chance of Thunder...............2 percent. 


.EXTENDED...
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows 67-74. Highs 82-91. Southeast winds
5 to 15 mph. 
.SUNDAY...Mostly clear with slight chance of showers and
thunderstorms. Lows 67-74. Highs 82-92. South winds 5 to 10 mph. 
.MONDAY...Clear. Lows 68-74. Highs 86-95. South winds 5 to
10 mph. 
.TUESDAY...Mostly clear. Lows 65-73. Highs 86-95. 
.WEDNESDAY...Mostly clear. Lows 65-72. Highs 85-93. 

$$

CAZ230-252030-
Joshua Tree National Park-
126 AM PDT Thu Sep 25 2025

.TODAY...
* Sky/weather.....................Sunny. 
* Max Temperature.................81-96. 
*    24 hr trend..................3 degrees cooler. 
* Min Humidity....................14-26 pct. 
*    24 hr trend..................8 pct drier. 
* Winds - 20 foot...Slope/Valley..West 5 to 15 mph. 
* Winds...10000 FT MSL............South 20 to 30 mph. 
* Chance of Precip................0 percent. 
* CWR (>= 0.10 IN)................0 percent. 
* Chance of Thunder...............0 percent. 

.TONIGHT...
* Sky/weather.....................Clear. 
* Min Temperature.................56-70. 
*    24 hr trend..................7 degrees cooler. 
* Max Humidity....................51-64 pct. 
*    24 hr trend..................Little RH change. 
* Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph. 
* Winds...10000 FT MSL............South 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...............1 percent. 

.FRIDAY...
* Sky/weather.....................Mostly sunny. Slight chance of 
  showers in the afternoon. 
* Max Temperature.................76-87. 
*    24 hr trend..................7 degrees cooler. 
* Min Humidity....................28-39 pct. 
*    24 hr trend..................14 pct wetter. 
* Winds - 20 foot...Slope/Valley..North 5 to 15 mph. 
* Winds...10000 FT MSL............Light and variable in the morning 
  becoming northeast 5 to 15 mph in the afternoon. 
* Chance of Precip................0 percent in the morning becoming 
  20 percent in the afternoon. 
* CWR (>= 0.10 IN)................0 percent. 
* Chance of Thunder...............5 percent. 


.EXTENDED...
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows 57-71. Highs 72-84. South winds
5 to 15 mph. 
.SUNDAY...Mostly clear with slight chance of showers and
thunderstorms. Lows 57-69. Highs 72-84. South winds 5 to 15 mph. 
.MONDAY...Clear. Lows 56-69. Highs 75-87. Southwest winds 5 to
15 mph. 
.TUESDAY...Mostly clear. Lows 54-68. Highs 73-88. 
.WEDNESDAY...Mostly clear. Lows 54-66. Highs 74-86. 

$$

.8 TO 10 DAY OUTLOOK...Thursday October 2nd through Saturday 
October 4th: Near normal temperatures and above median 
precipitation.