750
FNUS55 KREV 121923
FWFREV
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE RENO NV
1223 PM PDT WED AUG 12 2026
...FIRE WEATHER WATCH IN EFFECT FROM LATE TONIGHT THROUGH
THURSDAY EVENING FOR THE POTENTIAL FOR NEW FIRE STARTS DUE TO
LIGHTNING...
DISCUSSION
WET AND DRY THUNDERSTORMS BECOME MORE WIDESPREAD TODAY AND THURSDAY,
INCREASING THE POTENTIAL OF NEW LIGHTNING FIRES AND STRONG OUTFLOW
WINDS. WETTER STORMS WILL PROVIDE BENEFICIAL RAIN, BUT ALSO ELEVATE
THE RISK OF FLASH FLOODING IMPACTS ESPECIALLY TO ONGOING WILDFIRES.
MUCH COOLER AND MORE HUMID WEATHER PREVAILS INTO NEXT WEEK.
NOTE: THUNDERSTORMS IMPLY GUSTY AND ERRATIC WINDS.
NOTE: MIXING HEIGHTS ARE IN FEET ABOVE GROUND LEVEL OF THE VALLEY FLOORS.
NOTE: PLEASE SEE OPERATING PLAN FOR DETAILED ZONE DESCRIPTIONS
HTTPS://WWW.WEATHER.GOV/WRH/FIRE?WFO=REV
NVZ420-131530-
NORTHERN SIERRA FRONT INCLUDING CARSON CITY, DOUGLAS, STOREY,
SOUTHERN WASHOE, WESTERN LYON, AND FAR SOUTHERN LASSEN COUNTIES-
1223 PM PDT WED AUG 12 2026
TONIGHT
* SKY/WEATHER........MOSTLY CLOUDY. SMOKE. CHANCE OF THUNDERSTORMS.
* CHANCE OF THUNDER..20%.
* CHC WETTING RAIN...10%.
* MIN TEMPERATURE....
* VALLEYS..........50-60.
* MID SLOPE........55-65.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........61-71%.
* MID SLOPE........47-57%.
* 24 HR TREND......21% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 14 MPH WITH GUSTS TO 25 MPH
UNTIL EARLY MORNING BECOMING DOWNSLOPE 2 TO 5
MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH. GUSTS TO 25 MPH
UNTIL EARLY MORNING.
* MIXING HEIGHT......4000-5000 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO MARGINAL AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER........SHOWERS AND THUNDERSTORMS LIKELY. AREAS OF SMOKE.
* CHANCE OF THUNDER..50%.
* CHC WETTING RAIN...40%.
* MAX TEMPERATURE....
* VALLEYS..........75-85.
* MID SLOPE........72-82.
* 24 HR TREND......7 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........17-27%.
* MID SLOPE........31-41%.
* 24 HR TREND......10% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTH 8 TO 13 MPH
WITH GUSTS TO 20 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH.
* MIXING HEIGHT......2100-3100 FT AGL INCREASING TO 5600-6600 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING.
* CHANCE OF THUNDER..20%.
* CHC WETTING RAIN...20%.
* MIN TEMPERATURE....
* VALLEYS..........43-53.
* MID SLOPE........49-59.
* MAX HUMIDITY.......
* VALLEYS..........70-80%.
* MID SLOPE........56-66%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 8 TO 13 MPH WITH GUSTS TO 25 MPH
IN THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH. GUSTS TO 25 MPH
UNTIL EARLY MORNING.
* MIXING HEIGHT......2800-3800 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........VERY GOOD DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........MOSTLY SUNNY. SLIGHT CHANCE OF SHOWERS IN THE
AFTERNOON.
* CHANCE OF THUNDER..15%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........75-85.
* MID SLOPE........72-82.
* MIN HUMIDITY.......
* VALLEYS..........15-25%.
* MID SLOPE........25-35%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........LIGHT WINDS BECOMING EAST 10 TO 15 MPH IN THE
AFTERNOON.
* MIXING HEIGHT......700-1200 FT AGL INCREASING TO 6700-7700 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTH 10 TO 15 MPH IN THE
AFTERNOON.
* VENTILATION........POOR INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN CLEARING. CHANCE
OF SHOWERS IN THE EVENING. LOWS 43-53. DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 77-87. LOWS 43-53. SLOPE WINDS.
SUNDAY
PARTLY CLOUDY. HIGHS 78-88. LOWS 43-53. SLOPE WINDS.
MONDAY
PARTLY CLOUDY. HIGHS 78-88. LOWS 45-55. WEST WINDS 10 TO
15 MPH.
TUESDAY
MOSTLY CLOUDY. HIGHS 76-86. LOWS 45-55.
WEDNESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS. HIGHS
74-84.
NVZ421-131530-
SOUTHERN SIERRA FRONT INCLUDING ALPINE, NORTHERN MONO, SOUTHERN
LYON, AND WESTERN MINERAL COUNTIES-
1223 PM PDT WED AUG 12 2026
TONIGHT
* SKY/WEATHER........MOSTLY CLOUDY. CHANCE OF SHOWERS AND
THUNDERSTORMS.
* CHANCE OF THUNDER..30%.
* CHC WETTING RAIN...15%.
* MIN TEMPERATURE....
* VALLEYS..........42-52.
* MID SLOPE........53-63.
* 24 HR TREND......4 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........74-84%.
* MID SLOPE........55-65%.
* 24 HR TREND......18% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 5 TO 10 MPH IN THE EVENING BECOMING
DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS BECOMING SOUTHWEST 10 TO 15 MPH
AFTER MIDNIGHT.
* MIXING HEIGHT......2200-3200 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........VERY GOOD DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........SHOWERS AND THUNDERSTORMS LIKELY.
* CHANCE OF THUNDER..50%.
* CHC WETTING RAIN...50%.
* MAX TEMPERATURE....
* VALLEYS..........72-82.
* MID SLOPE........65-75.
* 24 HR TREND......5 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........34-44%.
* MID SLOPE........36-46%.
* 24 HR TREND......10% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING WEST 7 TO 12 MPH
WITH GUSTS TO 20 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 30
MPH.
* MIXING HEIGHT......2100-3100 FT AGL INCREASING TO 6200-7200 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........MOSTLY CLOUDY THEN BECOMING CLEAR. CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING.
* CHANCE OF THUNDER..30%.
* CHC WETTING RAIN...15%.
* MIN TEMPERATURE....
* VALLEYS..........37-47.
* MID SLOPE........49-59.
* MAX HUMIDITY.......
* VALLEYS..........74-84%.
* MID SLOPE........57-67%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH WITH GUSTS TO 30 MPH.
* MIXING HEIGHT......2700-3700 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH IN THE EVENING BECOMING
LIGHT.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........SUNNY THEN BECOMING PARTLY CLOUDY. SLIGHT
CHANCE OF SHOWERS IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........73-83.
* MID SLOPE........67-77.
* MIN HUMIDITY.......
* VALLEYS..........24-34%.
* MID SLOPE........25-35%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHEAST 5 TO 10
MPH LATE IN THE AFTERNOON.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH WITH GUSTS TO 25 MPH.
* MIXING HEIGHT......600-1100 FT AGL INCREASING TO 7500-8500 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTH 10 TO 15 MPH IN THE
AFTERNOON.
* VENTILATION........POOR INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING CLEAR.
SLIGHT CHANCE OF SHOWERS IN THE EVENING. LOWS 37-47. DOWNSLOPE 2 TO
5 MPH.
SATURDAY
CLEAR. HIGHS 75-85. LOWS 37-47. SLOPE WINDS.
SUNDAY
CLEAR. HIGHS 77-87. LOWS 38-48. SLOPE WINDS.
MONDAY
PARTLY CLOUDY. HIGHS 77-87. LOWS 40-50. SLOPE WINDS.
TUESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 75-85.
LOWS 40-50.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS. HIGHS
74-84.
CAZ272-131530-
GREATER LAKE TAHOE AND TRUCKEE AREA-
1223 PM PDT WED AUG 12 2026
...FIRE WEATHER WATCH IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY
EVENING...
TONIGHT
* SKY/WEATHER........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT.
* CHANCE OF THUNDER..20%.
* CHC WETTING RAIN...5%.
* MIN TEMPERATURE....
* VALLEYS..........44-54.
* MID SLOPE........48-58.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........88-98%.
* MID SLOPE........66-76%.
* 24 HR TREND......22% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 5 TO 10 MPH WITH GUSTS TO 20 MPH
IN THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 25
MPH.
* MIXING HEIGHT......3000-4000 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF THUNDER..30%.
* CHC WETTING RAIN...30%.
* MAX TEMPERATURE....
* VALLEYS..........64-74.
* MID SLOPE........62-72.
* 24 HR TREND......7 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........41-51%.
* MID SLOPE........42-52%.
* 24 HR TREND......13% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 7 TO 12
MPH WITH GUSTS TO 20 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO 30
MPH.
* MIXING HEIGHT......2100-3100 FT AGL INCREASING TO 4900-5900 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING CLEAR. SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING.
* CHANCE OF THUNDER..10%.
* CHC WETTING RAIN...10%.
* MIN TEMPERATURE....
* VALLEYS..........37-47.
* MID SLOPE........42-52.
* MAX HUMIDITY.......
* VALLEYS..........90-100%.
* MID SLOPE........70-80%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 5 TO 10 MPH WITH GUSTS TO 20 MPH
IN THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 30
MPH.
* MIXING HEIGHT......2900-3900 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........65-75.
* MID SLOPE........63-73.
* MIN HUMIDITY.......
* VALLEYS..........33-43%.
* MID SLOPE........33-43%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 30
MPH.
* MIXING HEIGHT......900-1400 FT AGL INCREASING TO 6700-7700 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTH 10 TO 15 MPH IN THE
AFTERNOON.
* VENTILATION........MARGINAL INCREASING TO EXCELLENT IN THE
AFTERNOON.
EXTENDED
FRIDAY NIGHT
CLEAR. LOWS 36-46. DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 67-76. LOWS 36-46. SLOPE WINDS.
SUNDAY THROUGH MONDAY
PARTLY CLOUDY. HIGHS 68-78. LOWS 38-48.
SLOPE WINDS.
TUESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 66-76.
LOWS 39-49.
WEDNESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS. HIGHS
64-74.
NVZ423-131530-
WEST HUMBOLDT BASIN IN PERSHING COUNTY-
1223 PM PDT WED AUG 12 2026
TONIGHT
* SKY/WEATHER........MOSTLY CLOUDY. AREAS OF SMOKE. SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF THUNDER..15%.
* CHC WETTING RAIN...10%.
* MIN TEMPERATURE....
* VALLEYS..........56-66.
* MID SLOPE........59-68.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........50-60%.
* MID SLOPE........34-44%.
* 24 HR TREND......14% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 17 MPH. GUSTS TO 25 MPH
INCREASING TO 30 MPH AFTER MIDNIGHT.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH INCREASING TO 20 TO
30 MPH AFTER MIDNIGHT. GUSTS TO 45 MPH IN THE
LATE EVENING AND OVERNIGHT.
* MIXING HEIGHT......5600-6600 FT AGL DECREASING TO 600-1100 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH.
* VENTILATION........EXCELLENT DECREASING TO FAIR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF THUNDER..40%.
* CHC WETTING RAIN...25%.
* MAX TEMPERATURE....
* VALLEYS..........80-88.
* MID SLOPE........75-85.
* 24 HR TREND......8 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........25-35%.
* MID SLOPE........28-38%.
* 24 HR TREND......18% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 9 TO 14 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 30
MPH.
* MIXING HEIGHT......1700-2700 FT AGL INCREASING TO 5700-6700 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF THUNDER..30%.
* CHC WETTING RAIN...25%.
* MIN TEMPERATURE....
* VALLEYS..........49-59.
* MID SLOPE........52-61.
* MAX HUMIDITY.......
* VALLEYS..........69-79%.
* MID SLOPE........51-61%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 9 TO 14 MPH IN THE EVENING BECOMING
DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH WITH GUSTS TO 25 MPH.
* MIXING HEIGHT......2100-3100 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........GOOD DECREASING TO MARGINAL AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........83-89.
* MID SLOPE........77-87.
* MIN HUMIDITY.......
* VALLEYS..........22-31%.
* MID SLOPE........23-33%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........LIGHT WINDS BECOMING SOUTHEAST 10 TO 15 MPH IN
THE LATE MORNING AND EARLY AFTERNOON, THEN
BECOMING LIGHT LATE IN THE AFTERNOON.
* MIXING HEIGHT......600-900 FT AGL INCREASING TO 7000-8000 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHEAST 10 TO 15 MPH.
* VENTILATION........POOR INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING PARTLY
CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. CHANCE OF
SHOWERS. LOWS 49-59. DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 83-91. LOWS 49-59. SLOPE WINDS.
SUNDAY
CLEAR. HIGHS 86-92. LOWS 51-61. SLOPE WINDS.
MONDAY
PARTLY CLOUDY. HIGHS 85-93. LOWS 53-63. SLOPE WINDS.
TUESDAY
PARTLY CLOUDY. HIGHS 83-91. LOWS 52-62.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 81-89.
NVZ429-131530-
LAHONTAN BASIN INCLUDING CHURCHILL AND EASTERN MINERAL COUNTIES-
1223 PM PDT WED AUG 12 2026
TONIGHT
* SKY/WEATHER........CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF THUNDER..30%.
* CHC WETTING RAIN...15%.
* MIN TEMPERATURE....
* VALLEYS..........51-61.
* MID SLOPE........57-67.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........70-80%.
* MID SLOPE........51-61%.
* 24 HR TREND......19% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 14 MPH. GUSTS TO 25 MPH
UNTIL EARLY MORNING.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO 35
MPH.
* MIXING HEIGHT......4100-5100 FT AGL DECREASING TO 600-1000 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO MARGINAL AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER........SHOWERS AND THUNDERSTORMS LIKELY.
* CHANCE OF THUNDER..50%.
* CHC WETTING RAIN...50%.
* MAX TEMPERATURE....
* VALLEYS..........77-87.
* MID SLOPE........72-82.
* 24 HR TREND......7 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........28-38%.
* MID SLOPE........31-41%.
* 24 HR TREND......15% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 8 TO 13 MPH. GUSTS TO 20 MPH LATE IN
THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH.
* MIXING HEIGHT......1600-2600 FT AGL INCREASING TO 4900-5900 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
CHANCE OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF THUNDER..30%.
* CHC WETTING RAIN...25%.
* MIN TEMPERATURE....
* VALLEYS..........46-56.
* MID SLOPE........51-61.
* MAX HUMIDITY.......
* VALLEYS..........73-83%.
* MID SLOPE........59-69%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 5 TO 10 MPH WITH GUSTS TO 20 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTHEAST WINDS 10 TO 15 MPH.
* MIXING HEIGHT......1800-2800 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........GOOD DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING SUNNY. SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* CHANCE OF THUNDER..10%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........78-88.
* MID SLOPE........74-84.
* MIN HUMIDITY.......
* VALLEYS..........24-34%.
* MID SLOPE........26-36%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........LIGHT WINDS BECOMING SOUTHWEST 10 TO 15 MPH LATE
IN THE AFTERNOON.
* MIXING HEIGHT......600-1000 FT AGL INCREASING TO 6600-7600 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTH 10 TO 15 MPH IN THE
AFTERNOON.
* VENTILATION........POOR INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN CLEARING. CHANCE
OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. LOWS
46-56. DOWNSLOPE 2 TO 5 MPH.
SATURDAY THROUGH SUNDAY
CLEAR. HIGHS 82-92. LOWS 46-56. SOUTHWEST
WINDS 10 TO 15 MPH.
MONDAY
PARTLY CLOUDY. HIGHS 83-93. LOWS 50-60. SLOPE WINDS.
TUESDAY
PARTLY CLOUDY. HIGHS 81-91. LOWS 49-59.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 79-89.
CAZ270-278-NVZ458-131530-
SURPRISE VALLEY CALIFORNIA-EASTERN LASSEN COUNTY-
NORTHERN WASHOE COUNTY-
1223 PM PDT WED AUG 12 2026
TONIGHT
* SKY/WEATHER........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MIN TEMPERATURE....
* VALLEYS..........45-55.
* MID SLOPE........52-62.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........45-55%.
* MID SLOPE........32-42%.
* 24 HR TREND......10% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 12 TO 18 MPH WITH GUSTS TO 30 MPH
BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........WEST WINDS 10 TO 20 MPH WITH GUSTS TO 30 MPH.
* MIXING HEIGHT......5500-6500 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....WEST 10 TO 20 MPH.
* VENTILATION........EXCELLENT DECREASING TO MARGINAL AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* CHANCE OF THUNDER..20%.
* CHC WETTING RAIN...25%.
* MAX TEMPERATURE....
* VALLEYS..........78-88.
* MID SLOPE........76-84.
* 24 HR TREND......6 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........17-27%.
* MID SLOPE........17-27%.
* 24 HR TREND......12% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 9 TO 16
MPH WITH GUSTS TO 25 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH.
* MIXING HEIGHT......2400-3400 FT AGL INCREASING TO 8500-9500 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........MOSTLY CLOUDY BECOMING PARTLY CLOUDY. SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING.
* CHANCE OF THUNDER..20%.
* CHC WETTING RAIN...15%.
* MIN TEMPERATURE....
* VALLEYS..........41-51.
* MID SLOPE........47-57.
* MAX HUMIDITY.......
* VALLEYS..........67-77%.
* MID SLOPE........53-63%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 17 MPH WITH GUSTS TO 25 MPH
BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH.
* MIXING HEIGHT......4300-5300 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH.
* VENTILATION........EXCELLENT DECREASING TO MARGINAL AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER........SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........78-88.
* MID SLOPE........75-83.
* MIN HUMIDITY.......
* VALLEYS..........15-25%.
* MID SLOPE........16-26%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 9 TO 14
MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 25
MPH.
* MIXING HEIGHT......600-1100 FT AGL INCREASING TO 7200-8200 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO EXCELLENT IN THE
AFTERNOON.
EXTENDED
FRIDAY NIGHT
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
EVENING. LOWS 40-50. WEST WINDS 9 TO 14 MPH UNTIL EARLY MORNING
BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 78-88. LOWS 40-50. WEST WINDS 10 TO 15 MPH.
SUNDAY THROUGH MONDAY
PARTLY CLOUDY. HIGHS 80-90. LOWS 40-50.
WEST WINDS 10 TO 15 MPH.
TUESDAY
MOSTLY CLOUDY. HIGHS 77-87. LOWS 41-51.
WEDNESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS. HIGHS
73-83.
CAZ271-131530-
WESTERN LASSEN, EASTERN PLUMAS, AND EASTERN SIERRA COUNTIES-
1223 PM PDT WED AUG 12 2026
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MIN TEMPERATURE....
* VALLEYS..........39-49.
* MID SLOPE........50-60.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........67-77%.
* MID SLOPE........41-51%.
* 24 HR TREND......18% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 9 TO 14 MPH WITH GUSTS TO 25 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 25
MPH.
* MIXING HEIGHT......3800-4800 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* CHANCE OF THUNDER..20%.
* CHC WETTING RAIN...20%.
* MAX TEMPERATURE....
* VALLEYS..........73-83.
* MID SLOPE........70-80.
* 24 HR TREND......6 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........25-35%.
* MID SLOPE........25-35%.
* 24 HR TREND......15% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 9 TO 14
MPH WITH GUSTS TO 25 MPH IN THE LATE MORNING
AND AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 25
MPH.
* MIXING HEIGHT......2400-3400 FT AGL INCREASING TO 7600-8600 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTHWEST 15 TO 20 MPH IN
THE AFTERNOON.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING CLEAR. SLIGHT
CHANCE OF SHOWERS IN THE EVENING.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MIN TEMPERATURE....
* VALLEYS..........33-43.
* MID SLOPE........47-57.
* MAX HUMIDITY.......
* VALLEYS..........77-87%.
* MID SLOPE........62-72%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 14 MPH WITH GUSTS TO 25 MPH
IN THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS BECOMING SOUTHWEST 10 TO 15 MPH WITH
GUSTS TO 25 MPH AFTER MIDNIGHT.
* MIXING HEIGHT......3700-4700 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH IN THE EVENING BECOMING
LIGHT.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........73-83.
* MID SLOPE........70-80.
* MIN HUMIDITY.......
* VALLEYS..........23-33%.
* MID SLOPE........21-31%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 7 TO 12
MPH WITH GUSTS TO 20 MPH LATE IN THE
AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 25
MPH.
* MIXING HEIGHT......600-1100 FT AGL INCREASING TO 7100-8100 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTHWEST 10 TO 15 MPH IN
THE AFTERNOON.
* VENTILATION........MARGINAL INCREASING TO EXCELLENT IN THE
AFTERNOON.
EXTENDED
FRIDAY NIGHT
CLEAR. LOWS 32-42. WEST WINDS 9 TO 14 MPH IN THE
EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 73-83. LOWS 32-42. SOUTHWEST WINDS 10 TO
15 MPH.
SUNDAY THROUGH MONDAY
PARTLY CLOUDY. HIGHS 75-85. LOWS 32-42.
SOUTHWEST WINDS 10 TO 15 MPH.
TUESDAY
PARTLY CLOUDY. HIGHS 72-82. LOWS 33-43.
WEDNESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS. HIGHS
69-79.
CAZ274-131530-
SOUTHERN MONO COUNTY-
1223 PM PDT WED AUG 12 2026
TONIGHT
* SKY/WEATHER........SHOWERS AND THUNDERSTORMS LIKELY IN THE EVENING.
CHANCE OF SHOWERS AFTER MIDNIGHT.
* CHANCE OF THUNDER..30%.
* CHC WETTING RAIN...15%.
* MIN TEMPERATURE....
* VALLEYS..........39-49.
* MID SLOPE........43-53.
* 24 HR TREND......4 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........82-92%.
* MID SLOPE........69-79%.
* 24 HR TREND......18% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS.
* MIXING HEIGHT......2100-3100 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........GOOD DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........SHOWERS AND THUNDERSTORMS LIKELY.
* CHANCE OF THUNDER..50%.
* CHC WETTING RAIN...40%.
* MAX TEMPERATURE....
* VALLEYS..........68-78.
* MID SLOPE........64-74.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........30-40%.
* MID SLOPE........33-43%.
* 24 HR TREND......4% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 9 TO 14
MPH WITH GUSTS TO 30 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH.
* MIXING HEIGHT......2300-3300 FT AGL INCREASING TO 7500-8500 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE EVENING.
* CHANCE OF THUNDER..20%.
* CHC WETTING RAIN...10%.
* MIN TEMPERATURE....
* VALLEYS..........35-45.
* MID SLOPE........40-50.
* MAX HUMIDITY.......
* VALLEYS..........81-91%.
* MID SLOPE........65-75%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 5 TO 10 MPH WITH GUSTS TO 30 MPH
IN THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........WEST WINDS 10 TO 15 MPH. GUSTS TO 30 MPH UNTIL
EARLY MORNING.
* MIXING HEIGHT......3200-4200 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH IN THE EVENING BECOMING
LIGHT.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........69-79.
* MID SLOPE........65-75.
* MIN HUMIDITY.......
* VALLEYS..........20-30%.
* MID SLOPE........22-32%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTH 5 TO 10 MPH
WITH GUSTS TO 25 MPH LATE IN THE AFTERNOON.
* RIDGE TOP........SOUTH WINDS 10 TO 20 MPH. GUSTS TO 30 MPH IN THE
LATE MORNING AND AFTERNOON.
* MIXING HEIGHT......700-1200 FT AGL INCREASING TO 7000-8000 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTH 10 TO 20 MPH IN THE
AFTERNOON.
* VENTILATION........MARGINAL INCREASING TO EXCELLENT IN THE
AFTERNOON.
EXTENDED
FRIDAY NIGHT
CLEAR. LOWS 35-45. SOUTHWEST WINDS 8 TO 13 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY THROUGH SUNDAY
CLEAR. HIGHS 72-82. LOWS 35-45. SLOPE
WINDS.
MONDAY
PARTLY CLOUDY. HIGHS 73-83. LOWS 37-47. SLOPE WINDS.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. HIGHS 72-82. LOWS 38-48.
.8 TO 14 DAY OUTLOOK FOR (THU AUG 20 THROUGH WED AUG 26)
ABOVE NORMAL TEMPERATURES AND PRECIPITATION.
=
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