FNUS55 KPSR 222116 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 216 PM MST Sat Aug 22 2026 .DISCUSSION... Hot and seasonally dry conditions are expected nearly every day, through next week. Minimum RHs this afternoon will be around 12-18% and will increase slightly over the next two afternoons, up to 20-25% for Monday. Temperatures will be around 5-10 degrees above normal, with lower desert highs eclipsing 110 degrees nearly every afternoon. There will be slight chances for storms each afternoon through Monday, but they will mostly favor the AZ higher terrain areas and features of the lower deserts. Outside of thunderstorm outflow winds, winds will follow the typical diurnal tendencies with some modest afternoon upslope gustiness. ...Thunderstorms imply gusty winds... Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-230930- 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- 216 PM MST Sat Aug 22 2026 .TONIGHT... * Sky/weather.....................Partly cloudy. * Min Temperature.................84-94. * 24 hr trend..................Little change. * Max Humidity....................27-38 pct. * 24 hr trend..................6 pct drier. * Winds - 20 foot...Slope/Valley..Southwest 5 to 10 mph in the evening becoming south after midnight. * Winds...10000 FT MSL............Light and variable in the evening becoming southeast 5 to 15 mph after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............4 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................106-112. * 24 hr trend..................Little change. * Min Humidity....................15-21 pct. * 24 hr trend..................4 pct wetter. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............Southeast 5 to 15 mph in the morning becoming light and variable in the afternoon. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............5 percent. * Mixing Height for Phoenix.......14000 ft AGL. * Transport Wind for Phoenix......Southwest 4 knots. * Dispersion for Phoenix..........Good. .SUNDAY NIGHT... * Sky/weather.....................Partly cloudy. Patchy blowing dust in the evening. Slight chance of showers in the evening. * Min Temperature.................82-92. * 24 hr trend..................3 degrees cooler. * Max Humidity....................46-63 pct. * 24 hr trend..................21 pct wetter. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............Light and variable. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............6 percent. .MONDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................103-109. * 24 hr trend..................3 degrees cooler. * Min Humidity....................21-26 pct. * 24 hr trend..................6 pct wetter. * Winds - 20 foot...Slope/Valley..South 5 to 10 mph in the morning becoming southwest in the afternoon. * Winds...10000 FT MSL............Southeast 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............4 percent. * Mixing Height for Phoenix.......7300 ft AGL. * Transport Wind for Phoenix......West 9 knots. * Dispersion for Phoenix..........Good. .EXTENDED... .TUESDAY...Mostly clear. Lows 82-92. Highs 107-114. West winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 85-95. Highs 111-117. West winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .THURSDAY...Mostly clear. Lows 84-94. Highs 110-117. Southwest winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .FRIDAY...Mostly clear. Lows 84-94. Highs 111-117. .SATURDAY...Mostly clear. Lows 84-94. Highs 108-114. $$ AZZ131-CAZ231-230930- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 216 PM MST Sat Aug 22 2026 /216 PM PDT Sat Aug 22 2026/ .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................85-90. * 24 hr trend..................Little change. * Max Humidity....................28-39 pct. * 24 hr trend..................6 pct drier. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............3 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................109-114. * 24 hr trend..................Little change. * Min Humidity....................15-22 pct. * 24 hr trend..................5 pct wetter. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............4 percent. * Mixing Height for Yuma..........9100 ft AGL. * Transport Wind for Yuma.........South 10 knots. * Dispersion for Yuma.............Good. .SUNDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................84-89. * 24 hr trend..................Little change. * Max Humidity....................51-68 pct. * 24 hr trend..................27 pct wetter. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............Southeast 5 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............2 percent. .MONDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................106-111. * 24 hr trend..................3 degrees cooler. * Min Humidity....................21-26 pct. * 24 hr trend..................6 pct wetter. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............Southeast 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............6 percent. * Mixing Height for Yuma..........8400 ft AGL. * Transport Wind for Yuma.........South 9 knots. * Dispersion for Yuma.............Very good. .EXTENDED... .TUESDAY...Mostly clear. Lows 84-91. Highs 109-114. Southwest winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 86-91. Highs 113-118. Southwest winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .THURSDAY...Mostly clear. Lows 85-90. Highs 113-118. South winds 5 to 15 mph. .FRIDAY...Mostly clear. Lows 85-90. Highs 113-118. .SATURDAY...Mostly clear. Lows 85-90. Highs 110-115. $$ AZZ133-230930- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 216 PM MST Sat Aug 22 2026 .TONIGHT... * Sky/weather.....................Partly cloudy. * Min Temperature.................67-85. * 24 hr trend..................Little change. * Max Humidity....................35-52 pct. * 24 hr trend..................4 pctdrier. * Winds - 20 foot...Slope/Valley..Northeast 5 to 15 mph. * Winds...10000 FT MSL............Light and variable. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............7 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. * Max Temperature.................92-107. * 24 hr trend..................Little change. * Min Humidity....................14-21 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..East 5 to 10 mph in the morning becoming west in the afternoon. * Winds...10000 FT MSL............South 5 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............8 percent. .SUNDAY NIGHT... * Sky/weather.....................Partly cloudy. Slight chance of showers and thunderstorms in the evening. * Min Temperature.................67-83. * 24 hr trend..................Little change. * Max Humidity....................43-56 pct. * 24 hr trend..................6 pct wetter. * Winds - 20 foot...Slope/Valley..North 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...............5 percent. .MONDAY... * Sky/weather.....................Partly sunny. * Max Temperature.................92-106. * 24 hr trend..................Little change. * Min Humidity....................18-26 pct. * 24 hr trend..................4 pct wetter. * Winds - 20 foot...Slope/Valley..Northwest 5 to 15 mph. * Winds...10000 FT MSL............Northeast 5 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............2 percent. .EXTENDED... .TUESDAY...Mostly clear. Lows 66-85. Highs 94-109. Northwest winds 5 to 15 mph. .WEDNESDAY...Mostly clear. Lows 67-85. Highs 95-110. North winds 5 to 15 mph. .THURSDAY...Mostly clear. Lows 67-85. Highs 95-110. North winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .FRIDAY...Mostly clear. Lows 68-85. Highs 95-111. .SATURDAY...Mostly clear. Lows 69-85. Highs 95-110. $$ CAZ232-230930- Imperial County And Eastern Riverside County- 216 PM PDT Sat Aug 22 2026 .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................85-91. * 24 hr trend..................Little change. * Max Humidity....................24-38 pct. * 24 hr trend..................3 pct drier. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............South 5 to 15 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...............2 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................104-114. * 24 hr trend..................Little change. * Min Humidity....................12-19 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............3 percent. .SUNDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................83-89. * 24 hr trend..................Little change. * Max Humidity....................37-70 pct. * 24 hr trend..................22 pct wetter.* Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............1 percent. .MONDAY... * Sky/weather.....................Mostly sunny. Slight chance of showers . slight chance of thunderstorms in the afternoon. * Max Temperature.................101-111. * 24 hr trend..................3 degrees cooler. * Min Humidity....................19-25 pct. * 24 hr trend..................6 pct wetter. * Winds - 20 foot...Slope/Valley..South 5 to 15 mph. * Winds...10000 FT MSL............Southeast 10 to 15 mph. * Chance of Precip................10 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............9 percent. .EXTENDED... .TUESDAY...Mostly clear. Lows 84-92. Highs 104-113. West winds 5 to 10 mph. .WEDNESDAY...Mostly clear. Lows 86-92. Highs 108-118. West winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .THURSDAY...Mostly clear. Lows 85-92. Highs 108-117. Southwest winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .FRIDAY...Mostly clear. Lows 85-91. Highs 108-118. .SATURDAY...Mostly clear. Lows 85-91. Highs 105-115. $$ CAZ230-230930- Joshua Tree National Park- 216 PM PDT Sat Aug 22 2026 .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................74-87. * 24 hr trend..................Little change. * Max Humidity....................26-33 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............Southwest 5 to 15 mph in the evening becoming south 15 to 25 mph after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............1 percent. .SUNDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................94-108. * 24 hr trend..................Little change. * Min Humidity....................12-17 pct. * 24 hr trend..................Little RH 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. * Chance of Thunder...............1 percent. .SUNDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................73-86. * 24 hr trend..................Little change. * Max Humidity....................28-39 pct. * 24 hr trend..................3 pct wetter. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............3 percent. .MONDAY... * Sky/weather.....................Mostly sunny. Slight chance of showers . slight chance of thunderstorms in the afternoon. * Max Temperature.................92-105. * 24 hr trend..................3 degrees cooler. * Min Humidity....................18-24 pct. * 24 hr trend..................6 pct wetter. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............South 10 to 15 mph. * Chance of Precip................10 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............10 percent. .EXTENDED... .TUESDAY...Mostly clear. Lows 73-88. Highs 94-107. West winds 5 to 15 mph. .WEDNESDAY...Mostly clear. Lows 75-88. Highs 98-112. West winds 10 to 20 mph. Minimum relative humidity may be lower than 15 percent. .THURSDAY...Mostly clear. Lows 75-88. Highs 98-112. West winds 5 to 15 mph. Minimum relative humidity may be lower than 15 percent. .FRIDAY...Mostly clear. Lows 74-87. Highs 98-112. .SATURDAY...Clear. Lows 74-87. Highs 96-109. $$ .8 TO 10 DAY OUTLOOK...Sunday August 30th through Tuesday September 1st: Above normal temperatures and near median precipitation.