Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Phoenix, AZ
Issued by NWS Phoenix, AZ
362 FNUS55 KPSR 192027 FWFPSR Fire Weather Planning Forecast for Southwest and South-Central Arizona and Southeast California National Weather Service Phoenix AZ 127 PM MST Tue Aug 19 2025 .DISCUSSION... Temperatures and thunderstorm chances will continue to trend upward this week. Thunderstorm chances today and tomorrow will increase primarily across the higher terrain east of Phoenix during the afternoon and evening hours. Lightning and gusty, erratic outflow winds will be the primary concerns with any thunderstorms. Chances for seeing outflow wind gusts in excess of 35 mph are around 30-50% for today before increasing to upwards of 50-70% tomorrow for areas east of Phoenix. Winds will otherwise favor diurnal upslope/downvalley patterns with occasional afternoon gusts in the 15-20 mph range. Min RHs will be around 15-25% over the next couple of days. Overnight Max RHs will generally be around 25-45% for most areas with higher values (50-80%) across southern Gila County. ...Thunderstorms imply gusty winds... Note...Additional Fire Weather Forecast information can be found in the Area Forecast Discussion. See product PHXAFDPSR. AZZ132-200830- 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- 127 PM MST Tue Aug 19 2025 .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................80-90. * 24 hr trend..................Little change. * Max Humidity....................22-34 pct. * 24 hr trend..................3 pct drier. * Winds - 20 foot...Slope/Valley..Southwest 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...............3 percent. .WEDNESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................106-112. * 24 hr trend..................3 degrees warmer. * Min Humidity....................12-17 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............Southeast 5 to 15 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............4 percent. * Mixing Height for Phoenix.......9500 ft AGL. * Transport Wind for Phoenix......Southwest 4 knots. * Dispersion for Phoenix..........Marginal. .WEDNESDAY NIGHT... * Sky/weather.....................Partly cloudy. Slight chance of showers and thunderstorms in the evening. * Min Temperature.................84-94. * 24 hr trend..................3 degrees warmer. * Max Humidity....................26-42 pct. * 24 hr trend..................5 pct wetter. * Winds - 20 foot...Slope/Valley..Southwest 5 to 10 mph in the evening becoming southeast after midnight. * Winds...10000 FT MSL............Light and variable in the evening becoming east 5 to 15 mph after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............7 percent. .THURSDAY... * Sky/weather.....................Mostly sunny. Slight chance of showers and thunderstorms in the afternoon. * Max Temperature.................107-113. * 24 hr trend..................Little change. * Min Humidity....................14-19 pct. * 24 hr trend..................3 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 5 to 10 mph in the morning becoming south in the afternoon. * Winds...10000 FT MSL............East 5 to 15 mph in the morning becoming light and variable 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...............11 percent. * Mixing Height for Phoenix.......11000 ft AGL. * Transport Wind for Phoenix......East 4 knots. * Dispersion for Phoenix..........Fair. .EXTENDED... .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 83-93. Highs 107-112. South winds 5 to 10 mph. .SATURDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 82-92. Highs 105-110. Southwest winds 5 to 10 mph. .SUNDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 82-92. Highs 104-110. Southwest winds 5 to 15 mph. .MONDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 78-88. Highs 98-104. .TUESDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 77-87. Highs 96-101. $$ AZZ131-CAZ231-200830- Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Lower Colorado River Valley CA- 127 PM MST Tue Aug 19 2025 /127 PM PDT Tue Aug 19 2025/ .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................79-85. * 24 hr trend..................3 degrees warmer. * Max Humidity....................23-34 pct. * 24 hr trend..................10 pct drier. * Winds - 20 foot...Slope/Valley..Southwest 5 to 15 mph. * Winds...10000 FT MSL............Southeast 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............2 percent. .WEDNESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................108-113. * 24 hr trend..................Little change. * Min Humidity....................12-16 pct. * 24 hr trend..................Little change. * Winds - 20 foot...Slope/Valley..Northwest 5 to 10 mph in the morning becoming southwest in the afternoon. * Winds...10000 FT MSL............South 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...............3 percent. * Mixing Height for Yuma..........10300 ft AGL. * Transport Wind for Yuma.........South 5 knots. * Dispersion for Yuma.............Good. .WEDNESDAY NIGHT... * Sky/weather.....................Partly cloudy. * Min Temperature.................83-88. * 24 hr trend..................3 degrees warmer. * Max Humidity....................27-37 pct. * 24 hr trend..................4 pct wetter. * Winds - 20 foot...Slope/Valley..Southwest 5 to 10 mph in the evening becoming south after midnight. * Winds...10000 FT MSL............Southeast 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............3 percent. .THURSDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................110-115. * 24 hr trend..................Little change. * Min Humidity....................14-18 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..South 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...............6 percent. * Mixing Height for Yuma..........10300 ft AGL. * Transport Wind for Yuma.........South 6 knots. * Dispersion for Yuma.............Good. .EXTENDED... .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 84-89. Highs 109-114. South winds 5 to 15 mph. .SATURDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 84-89. Highs 106-111. South winds 5 to 15 mph. .SUNDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 82-88. Highs 105-110. South winds 5 to 15 mph. .MONDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 80-87. Highs 100-105. .TUESDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 78-84. Highs 98-103. $$ AZZ133-200830- Southern Gila County/Tonto National Forest Foothills- Southern Tonto NF/West San Carlos BIA/South Portion Ft Apache BIA/ CAZ- 127 PM MST Tue Aug 19 2025 .TONIGHT... * Sky/weather.....................Partly cloudy. Slight chance of showers and thunderstorms in the evening. * Min Temperature.................66-82. * 24 hr trend..................Little change. * Max Humidity....................33-62 pct. * 24 hr trend..................9 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 15 mph. * Winds...10000 FT MSL............East 5 to 15 mph in the evening becoming southeast 10 to 20 mph after midnight. * Chance of Precip................20 percent in the evening becoming 0 percent after midnight. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............17 percent. .WEDNESDAY... * Sky/weather.....................Partly sunny. Chance of showers and thunderstorms in the afternoon. * Max Temperature.................90-107. * 24 hr trend..................Little change. * Min Humidity....................17-29 pct. * 24 hr trend..................6 pct wetter. * Winds - 20 foot...Slope/Valley..Southeast 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 in the morning becoming 30 percent in the afternoon. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............31 percent. .WEDNESDAY NIGHT... * Sky/weather.....................Partly cloudy. Chance of showers and slight chance of thunderstorms in the evening. Haze and areas of smoke . * Min Temperature.................66-85. * 24 hr trend..................Little change. * Max Humidity....................41-64 pct. * 24 hr trend..................5 pct wetter. * Winds - 20 foot...Slope/Valley..East 5 to 15 mph. * Winds...10000 FT MSL............Southeast 10 to 15 mph. * Chance of Precip................30 percent in the evening becoming 0 percent after midnight. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............31 percent. .THURSDAY... * Sky/weather.....................Partly sunny. Haze in the morning. Chance of showers . chance of thunderstorms in the afternoon. * Max Temperature.................91-108. * 24 hr trend..................Little change. * Min Humidity....................18-29 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Southeast 5 to 15 mph. * Winds...10000 FT MSL............Southeast 5 to 15 mph. * Chance of Precip................30 percent. * CWR (>= 0.10 IN)................10 percent. * Chance of Thunder...............33 percent. .EXTENDED... .FRIDAY...Partly cloudy with chance of showers and thunderstorms. Lows 66-85. Highs 92-107. East winds 5 to 15 mph. .SATURDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 66-84. Highs 91-106. East winds 5 to 15 mph. .SUNDAY...Partly cloudy with chance of showers and thunderstorms. Lows 65-83. Highs 90-105. East winds 5 to 15 mph. .MONDAY...Partly cloudy with chance of showers and thunderstorms. Lows 63-83. Highs 88-102. .TUESDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 61-80. Highs 85-98. $$ CAZ232-200830- Imperial County And Eastern Riverside County- 127 PM PDT Tue Aug 19 2025 .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................81-87. * 24 hr trend..................3 degrees warmer. * Max Humidity....................17-32 pct. * 24 hr trend..................8 pct drier. * Winds - 20 foot...Slope/Valley..Southwest 5 to 10 mph in the evening becoming northwest after midnight. * Winds...10000 FT MSL............Light and variable in the evening becoming south 5 to 15 mph after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............1 percent. .WEDNESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................103-112. * 24 hr trend..................Little change. * Min Humidity....................10-15 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..Northwest 5 to 10 mph in the morning becoming south in the afternoon. * Winds...10000 FT MSL............South 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...............3 percent. .WEDNESDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................83-90. * 24 hr trend..................3 degrees warmer. * Max Humidity....................21-37 pct. * 24 hr trend..................5 pct wetter. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............Southeast 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...............1 percent. .THURSDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................105-114. * 24 hr trend..................Little change. * Min Humidity....................12-17 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..East 5 to 10 mph in the morning becoming south in the afternoon. * Winds...10000 FT MSL............Southeast 10 to 20 mph. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............6 percent. .EXTENDED... .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 85-91. Highs 105-114. South winds 5 to 15 mph. .SATURDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 84-91. Highs 102-111. South winds 5 to 10 mph. .SUNDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 82-90. Highs 101-110. South winds 5 to 15 mph. .MONDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 80-89. Highs 96-106. .TUESDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 77-86. Highs 93-103. $$ CAZ230-200830- Joshua Tree National Park- 127 PM PDT Tue Aug 19 2025 .TONIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................72-82. * 24 hr trend..................3 degrees warmer. * Max Humidity....................20-24 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..West 5 to 15 mph. * Winds...10000 FT MSL............Light and variable in the evening becoming south 5 to 15 mph after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .WEDNESDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................93-107. * 24 hr trend..................Little change. * Min Humidity....................12-16 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..North 5 to 10 mph in the morning becoming south in the afternoon. * Winds...10000 FT MSL............South 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...............3 percent. .WEDNESDAY NIGHT... * Sky/weather.....................Mostly clear. * Min Temperature.................75-85. * 24 hr trend..................4 degrees warmer. * Max Humidity....................23-27 pct. * 24 hr trend..................3 pct wetter. * Winds - 20 foot...Slope/Valley..Southwest 5 to 10 mph in the evening becoming northwest after midnight. * Winds...10000 FT MSL............Light and variable in the evening becoming southeast 10 to 20 mph after midnight. * Chance of Precip................0 percent. * CWR (>= 0.10 IN)................0 percent. * Chance of Thunder...............0 percent. .THURSDAY... * Sky/weather.....................Mostly sunny. * Max Temperature.................95-108. * 24 hr trend..................Little change. * Min Humidity....................13-18 pct. * 24 hr trend..................Little RH change. * Winds - 20 foot...Slope/Valley..North 5 to 10 mph in the morning becoming south in the afternoon. * Winds...10000 FT MSL............South 10 to 20 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...............6 percent. .EXTENDED... .FRIDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 76-87. Highs 95-109. Southwest winds 5 to 15 mph. .SATURDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 75-86. Highs 92-105. Southwest winds 5 to 15 mph. .SUNDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 73-86. Highs 91-104. Southwest winds 5 to 15 mph. .MONDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows 70-84. Highs 87-100. .TUESDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows 68-81. Highs 84-97. $$ .8 TO 10 DAY OUTLOOK...Wednesday August 27th through Friday August 29th: Near normal temperatures and above median precipitation.