576
FNUS55 KREV 200850
FWFREV
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE RENO NV
150 AM PDT THU AUG 20 2026
...ELEVATED TO LOCALLY CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED
FRIDAY AND SATURDAY ACROSS PORTIONS OF NORTHWEST NEVADA AND NORTHEAST
CALIFORNIA...
DISCUSSION
WARM TEMPERATURES, POOR OVERNIGHT RECOVERIES, AND TYPICAL
AFTERNOON GUSTS TO AROUND 20 MPH CONTINUE THURSDAY. WINDS INCREASE
FRIDAY AND SATURDAY TO 30-35 MPH FOR NORTHWEST NV AND NORTHEAST CA,
CREATING 2-4 HOURS OF CRITICAL FIRE WEATHER CONDITIONS. SHOWERS AND
THUNDERSTORMS RETURN FRIDAY THROUGH EARLY NEXT WEEK ACROSS THE
EASTERN SIERRA AND WESTERN NV.
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
NVZ420-210030-
NORTHERN SIERRA FRONT INCLUDING CARSON CITY, DOUGLAS, STOREY,
SOUTHERN WASHOE, WESTERN LYON, AND FAR SOUTHERN LASSEN COUNTIES-
150 AM PDT THU AUG 20 2026
TODAY
* SKY/WEATHER........SUNNY THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........87-97.
* MID SLOPE........85-95.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........5-15%.
* MID SLOPE........10-18%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH. GUSTS TO 20 MPH
LATE IN THE AFTERNOON.
* MIXING HEIGHT......1500-2000 FT AGL INCREASING TO 6400-7400 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........52-62.
* MID SLOPE........58-68.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........36-46%.
* MID SLOPE........23-33%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 8 TO 13 MPH WITH GUSTS TO 20 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........WEST WINDS 10 TO 15 MPH.
* MIXING HEIGHT......4700-5700 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........85-95.
* MID SLOPE........83-93.
* MIN HUMIDITY.......
* VALLEYS..........8-18%.
* MID SLOPE........13-23%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING WEST 8 TO 13 MPH
WITH GUSTS TO 25 MPH LATE IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH. GUSTS TO 25 MPH
LATE IN THE AFTERNOON.
* MIXING HEIGHT......1700-2200 FT AGL INCREASING TO 7400-8400 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS 52-62. WEST WINDS 9 TO 14 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 84-94. LOWS 48-58. SOUTHWEST WINDS 10 TO
15 MPH.
SUNDAY THROUGH MONDAY
PARTLY CLOUDY. HIGHS 82-92. LOWS 48-58.
SOUTHWEST WINDS 10 TO 15 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. HIGHS 82-92. LOWS 47-57.
NVZ421-210030-
SOUTHERN SIERRA FRONT INCLUDING ALPINE, NORTHERN MONO, SOUTHERN
LYON, AND WESTERN MINERAL COUNTIES-
150 AM PDT THU AUG 20 2026
TODAY
* SKY/WEATHER........SUNNY THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........87-97.
* MID SLOPE........81-91.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........10-19%.
* MID SLOPE........11-21%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING NORTHWEST 9 TO 14
MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH SHIFTING TO THE
SOUTHWEST IN THE LATE MORNING AND AFTERNOON.
* MIXING HEIGHT......2000-3000 FT AGL INCREASING TO 9100-10100 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........48-58.
* MID SLOPE........60-70.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........35-45%.
* MID SLOPE........24-34%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 9 TO 14 MPH UNTIL EARLY MORNING
BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 25
MPH.
* MIXING HEIGHT......5600-6600 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........84-94.
* MID SLOPE........77-87.
* MIN HUMIDITY.......
* VALLEYS..........13-23%.
* MID SLOPE........13-23%.
* 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......2600-3600 FT AGL INCREASING TO 10200-11200 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS 48-58. SOUTHWEST WINDS 8 TO 13 MPH UNTIL EARLY
MORNING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. HIGHS 81-91. LOWS 44-54. SOUTHWEST WINDS 10 TO
15 MPH.
SUNDAY THROUGH MONDAY
PARTLY CLOUDY. HIGHS 81-91. LOWS 43-53.
SOUTHWEST WINDS 10 TO 15 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. HIGHS 81-91. LOWS 43-53.
CAZ272-210030-
GREATER LAKE TAHOE AND TRUCKEE AREA-
150 AM PDT THU AUG 20 2026
TODAY
* SKY/WEATHER........SUNNY THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........76-86.
* MID SLOPE........74-84.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........16-26%.
* MID SLOPE........17-27%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING WEST 5 TO 10 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......1600-2100 FT AGL INCREASING TO 5200-6200 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........48-58.
* MID SLOPE........52-62.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........55-65%.
* MID SLOPE........29-39%.
* 24 HR TREND......LITTLE CHANGE.
* 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........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 30
MPH.
* MIXING HEIGHT......2400-3400 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 CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........74-84.
* MID SLOPE........72-82.
* MIN HUMIDITY.......
* VALLEYS..........20-30%.
* MID SLOPE........21-31%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 8 TO 13
MPH WITH GUSTS TO 20 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO 30
MPH.
* MIXING HEIGHT......1700-2700 FT AGL INCREASING TO 6300-7300 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING PARTLY
CLOUDY. LOWS 48-58. SOUTHWEST WINDS 7 TO 12 MPH IN THE EVENING
BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 71-81. LOWS 44-54. SOUTHWEST WINDS 10 TO
15 MPH.
SUNDAY
PARTLY CLOUDY. HIGHS 72-82. LOWS 44-54. SLOPE WINDS.
MONDAY
PARTLY CLOUDY. HIGHS 71-81. LOWS 43-53. SLOPE WINDS.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. HIGHS 72-82. LOWS 42-52.
NVZ423-210030-
WEST HUMBOLDT BASIN IN PERSHING COUNTY-
150 AM PDT THU AUG 20 2026
TODAY
* SKY/WEATHER........SUNNY THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........94-102.
* MID SLOPE........89-99.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........8-13%.
* MID SLOPE........8-13%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 5 TO 10
MPH LATE IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH.
* MIXING HEIGHT......1300-1800 FT AGL INCREASING TO 7100-8100 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........59-69.
* MID SLOPE........61-70.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........21-31%.
* MID SLOPE........18-28%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 5 TO 10 MPH IN THE EVENING BECOMING
DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS.
* MIXING HEIGHT......4500-5500 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........93-99.
* MID SLOPE........87-97.
* MIN HUMIDITY.......
* VALLEYS..........10-15%.
* MID SLOPE........11-16%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 8 TO 13
MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH.
* MIXING HEIGHT......1400-1900 FT AGL INCREASING TO 8900-9900 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO EXCELLENT IN THE
AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS 61-70. WEST WINDS 8 TO 13 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
PARTLY CLOUDY. HIGHS 91-97. LOWS 56-66. SOUTHWEST WINDS
10 TO 15 MPH.
SUNDAY THROUGH MONDAY
PARTLY CLOUDY. HIGHS 89-95. LOWS 56-66.
SLOPE WINDS.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. HIGHS 88-95. LOWS 56-66.
NVZ429-210030-
LAHONTAN BASIN INCLUDING CHURCHILL AND EASTERN MINERAL COUNTIES-
150 AM PDT THU AUG 20 2026
TODAY
* SKY/WEATHER........SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........92-102.
* MID SLOPE........88-98.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........8-15%.
* MID SLOPE........9-14%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH.
* MIXING HEIGHT......1600-2100 FT AGL INCREASING TO 7800-8800 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........58-68.
* MID SLOPE........62-72.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........29-39%.
* MID SLOPE........19-29%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....NORTHWEST WINDS 7 TO 12 MPH UNTIL EARLY MORNING
BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........NORTHWEST WINDS 10 TO 15 MPH UNTIL EARLY MORNING
BECOMING LIGHT.
* MIXING HEIGHT......5300-6300 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....NORTHWEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........90-100.
* MID SLOPE........86-96.
* MIN HUMIDITY.......
* VALLEYS..........10-18%.
* MID SLOPE........11-17%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING WEST 5 TO 10 MPH
LATE IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH. GUSTS TO 25 MPH IN
THE LATE MORNING AND AFTERNOON.
* MIXING HEIGHT......1700-2700 FT AGL INCREASING TO 9600-10600 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 58-68.
WEST WINDS 9 TO 14 MPH IN THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 87-97.
LOWS 54-64. WEST WINDS 10 TO 15 MPH.
SUNDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. HIGHS 86-96. LOWS 54-64. SLOPE WINDS.
MONDAY
PARTLY CLOUDY. HIGHS 86-96. LOWS 54-64. SLOPE WINDS.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. HIGHS 86-96. LOWS 54-64.
CAZ270-278-NVZ458-210030-
SURPRISE VALLEY CALIFORNIA-EASTERN LASSEN COUNTY-
NORTHERN WASHOE COUNTY-
150 AM PDT THU AUG 20 2026
TODAY
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........88-98.
* MID SLOPE........85-93.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........6-14%.
* MID SLOPE........8-13%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 9 TO 14
MPH WITH GUSTS TO 25 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH.
* MIXING HEIGHT......1300-1800 FT AGL INCREASING TO 7000-8000 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........49-59.
* MID SLOPE........54-64.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........28-38%.
* MID SLOPE........22-32%.
* 24 HR TREND......4% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 15 MPH WITH GUSTS TO 25 MPH
BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........WEST WINDS 10 TO 15 MPH. GUSTS TO 20 MPH IN THE
MORNING.
* MIXING HEIGHT......4500-5500 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........86-96.
* MID SLOPE........83-91.
* MIN HUMIDITY.......
* VALLEYS..........9-19%.
* MID SLOPE........11-17%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 9 TO 16
MPH WITH GUSTS TO 30 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH.
* MIXING HEIGHT......1400-1900 FT AGL INCREASING TO 7000-8000 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTH 15 TO 20 MPH IN THE
AFTERNOON.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS 48-58. SOUTHWEST WINDS 9 TO
17 MPH IN THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 84-94. LOWS 40-50. SOUTHWEST WINDS 10 TO
20 MPH.
SUNDAY
CLEAR. HIGHS 83-93. LOWS 40-50. WEST WINDS 10 TO 15 MPH.
MONDAY
PARTLY CLOUDY. HIGHS 83-93. LOWS 44-54. SOUTHWEST WINDS
10 TO 15 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. HIGHS 83-93. LOWS 43-53.
CAZ271-210030-
WESTERN LASSEN, EASTERN PLUMAS, AND EASTERN SIERRA COUNTIES-
150 AM PDT THU AUG 20 2026
TODAY
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........83-93.
* MID SLOPE........80-90.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........11-21%.
* MID SLOPE........10-20%.
* 24 HR TREND......LITTLE CHANGE.
* 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.
* MIXING HEIGHT......1400-1900 FT AGL INCREASING TO 6600-7600 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTHWEST 10 TO 20 MPH IN
THE AFTERNOON.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........42-52.
* MID SLOPE........53-63.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........41-51%.
* MID SLOPE........27-37%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 8 TO 13 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......3300-4300 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........81-91.
* MID SLOPE........78-88.
* MIN HUMIDITY.......
* VALLEYS..........16-26%.
* MID SLOPE........16-26%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 9 TO 14
MPH WITH GUSTS TO 25 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH.
* MIXING HEIGHT......1600-2600 FT AGL INCREASING TO 7900-8900 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTH 15 TO 25 MPH IN THE
AFTERNOON.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN CLEARING. LOWS
41-51. SOUTHWEST WINDS 9 TO 14 MPH IN THE EVENING BECOMING DOWNSLOPE
2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 78-88. LOWS 35-45. SOUTHWEST WINDS 10 TO
15 MPH.
SUNDAY THROUGH MONDAY
CLEAR. HIGHS 79-89. LOWS 35-45. SOUTHWEST
WINDS 10 TO 15 MPH.
TUESDAY
CLEAR. HIGHS 78-88. LOWS 36-46.
WEDNESDAY
PARTLY CLOUDY. HIGHS 78-88.
CAZ274-210030-
SOUTHERN MONO COUNTY-
150 AM PDT THU AUG 20 2026
TODAY
* SKY/WEATHER........SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........83-93.
* MID SLOPE........79-89.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........9-19%.
* MID SLOPE........11-21%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTH 9 TO 14 MPH
WITH GUSTS TO 25 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH. GUSTS TO 25 MPH IN
THE AFTERNOON.
* MIXING HEIGHT......1800-2800 FT AGL INCREASING TO 8600-9600 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........48-58.
* MID SLOPE........51-61.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........43-53%.
* MID SLOPE........29-39%.
* 24 HR TREND......LITTLE CHANGE.
* 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 IN
THE EVENING.
* MIXING HEIGHT......5000-6000 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........78-88.
* MID SLOPE........75-85.
* MIN HUMIDITY.......
* VALLEYS..........15-25%.
* MID SLOPE........17-27%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 9 TO 15
MPH WITH GUSTS TO 30 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH. GUSTS TO 30 MPH IN
THE LATE MORNING AND AFTERNOON.
* MIXING HEIGHT......2700-3700 FT AGL INCREASING TO 9400-10400 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS 47-57. SOUTHWEST WINDS 9 TO 14 MPH IN THE EVENING
BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
MOSTLY CLEAR. SLIGHT CHANCE OF THUNDERSTORMS. HIGHS 76-86. LOWS
44-54. SOUTHWEST WINDS 10 TO 15 MPH.
SUNDAY THROUGH MONDAY
PARTLY CLOUDY. HIGHS 76-86. LOWS 43-53.
SOUTHWEST WINDS 10 TO 15 MPH.
TUESDAY THROUGH WEDNESDAY
CLEAR. HIGHS 76-86. LOWS 43-53.
.8 TO 14 DAY OUTLOOK FOR (THU AUG 27 THROUGH WED SEP 2)
ABOVE NORMAL TEMPERATURES AND NEAR NORMAL PRECIPITATION.
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