206
FNUS55 KREV 170738
FWFREV
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE RENO NV
1238 AM PDT THU SEP 17 2026
DISCUSSION
LOW CHANCES OF RAIN AND ISOLATED LIGHTNING PERSIST OVERNIGHT NEAR THE
OR BORDER BEFORE INCREASING IN THE AFTERNOON. DRY AND BREEZY CONDITIONS
ARE EXPECTED THIS AFTERNOON FROM THE SIERRA FRONT -- INCLUDING THE
FLORISTON FIRE -- INTO THE E SIERRA. LIGHT N/NE BREEZES RETURN FRIDAY
AND SATURDAY WITH GUSTY E/NE WINDS ALONG THE SIERRA CREST. WARM AND DRY
WEATHER PREVAILS THIS WEEKEND BEFORE CHANCES OF RAIN AND STORMS INCREASE
ALONG THE SIERRA SOUTH OF TAHOE SUNDAY 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
NVZ420-180030-
NORTHERN SIERRA FRONT INCLUDING CARSON CITY, DOUGLAS, STOREY,
SOUTHERN WASHOE, WESTERN LYON, AND FAR SOUTHERN LASSEN COUNTIES-
1238 AM PDT THU SEP 17 2026
TODAY
* SKY/WEATHER........SUNNY. PATCHY SMOKE.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........67-77.
* MID SLOPE........63-73.
* 24 HR TREND......5 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........11-21%.
* MID SLOPE........18-28%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 10 TO 15 MPH WITH GUSTS OF 25 TO
30 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 35
MPH.
* MIXING HEIGHT......2400-3400 FT AGL INCREASING TO 7500-8500 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR. PATCHY SMOKE.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........36-46.
* MID SLOPE........38-47.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........59-69%.
* MID SLOPE........46-56%.
* 24 HR TREND......4% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 10 TO 15 MPH WITH GUSTS TO 30 MPH
BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........WEST WINDS 10 TO 20 MPH. GUSTS TO 30 MPH UNTIL
EARLY MORNING.
* MIXING HEIGHT......3700-4700 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........SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........69-79.
* MID SLOPE........64-74.
* MIN HUMIDITY.......
* VALLEYS..........15-25%.
* MID SLOPE........20-30%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING NORTH 7 TO 12 MPH IN
THE AFTERNOON.
* RIDGE TOP........LIGHT WINDS BECOMING NORTH 10 TO 15 MPH LATE IN
THE AFTERNOON.
* MIXING HEIGHT......1400-1900 FT AGL INCREASING TO 4900-5900 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING NORTHWEST 10 TO 15 MPH IN
THE AFTERNOON.
* VENTILATION........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
CLEAR. LOWS 43-53. NORTH WINDS 5 TO 10 MPH IN THE
EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 72-82. LOWS 43-53. SLOPE WINDS.
SUNDAY
PARTLY CLOUDY. HIGHS 74-84. LOWS 46-56. SLOPE WINDS.
MONDAY
CLEAR. HIGHS 76-86. LOWS 48-58. SLOPE WINDS.
TUESDAY
CLEAR. HIGHS 77-87. LOWS 47-57.
WEDNESDAY
SUNNY. HIGHS 77-87.
NVZ421-180030-
SOUTHERN SIERRA FRONT INCLUDING ALPINE, NORTHERN MONO, SOUTHERN
LYON, AND WESTERN MINERAL COUNTIES-
1238 AM PDT THU SEP 17 2026
TODAY
* SKY/WEATHER........SUNNY. PATCHY SMOKE.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........68-78.
* MID SLOPE........61-71.
* 24 HR TREND......4 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........10-20%.
* MID SLOPE........11-21%.
* 24 HR TREND......4% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 10 TO 15 MPH. GUSTS TO 25 MPH.
* RIDGE TOP........SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 50
MPH.
* MIXING HEIGHT......1900-2900 FT AGL INCREASING TO 6400-7400 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 15 TO 20 MPH INCREASING TO 20 TO 30
MPH IN THE AFTERNOON.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR. SMOKE IN THE EVENING. PATCHY SMOKE
AFTER MIDNIGHT.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........28-38.
* MID SLOPE........41-51.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........56-66%.
* MID SLOPE........40-50%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 12 TO 17 MPH WITH GUSTS TO 30 MPH
BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH. GUSTS TO 30 MPH
UNTIL EARLY MORNING.
* MIXING HEIGHT......3300-4300 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........SUNNY. PATCHY SMOKE IN THE MORNING.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........67-77.
* MID SLOPE........61-71.
* MIN HUMIDITY.......
* VALLEYS..........17-25%.
* MID SLOPE........17-27%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING NORTH 9 TO 15 MPH IN
THE AFTERNOON.
* RIDGE TOP........LIGHT WINDS BECOMING NORTH 10 TO 15 MPH WITH
GUSTS TO 25 MPH IN THE AFTERNOON.
* MIXING HEIGHT......1600-2100 FT AGL INCREASING TO 6200-7200 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....NORTHWEST 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
CLEAR. LOWS 34-44. NORTH WINDS 9 TO 15 MPH IN THE
EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 72-82. LOWS 34-44. SLOPE WINDS.
SUNDAY
PARTLY CLOUDY. HIGHS 74-84. LOWS 39-49. WEST WINDS 10 TO
15 MPH.
MONDAY
PARTLY CLOUDY. HIGHS 74-84. LOWS 40-50. SLOPE WINDS.
TUESDAY
CLEAR. HIGHS 75-85. LOWS 39-49.
WEDNESDAY
SUNNY. HIGHS 76-86.
CAZ272-180030-
GREATER LAKE TAHOE AND TRUCKEE AREA-
1238 AM PDT THU SEP 17 2026
TODAY
* SKY/WEATHER........MOSTLY SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........58-64.
* MID SLOPE........52-62.
* 24 HR TREND......5 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........33-43%.
* MID SLOPE........31-41%.
* 24 HR TREND......8% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 7 TO 12 MPH. GUSTS TO 20 MPH IN
THE LATE MORNING AND AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 45
MPH.
* MIXING HEIGHT......1900-2900 FT AGL INCREASING TO 5100-6100 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 15 TO 25 MPH.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........29-39.
* MID SLOPE........33-43.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........63-73%.
* MID SLOPE........52-62%.
* 24 HR TREND......8% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 5 TO 10 MPH IN THE EVENING
BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........WEST WINDS 10 TO 15 MPH. GUSTS TO 25 MPH UNTIL
EARLY MORNING.
* MIXING HEIGHT......2200-3200 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........VERY GOOD DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........SUNNY. AREAS OF SMOKE IN THE MORNING. PATCHY
SMOKE IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........63-71.
* MID SLOPE........58-68.
* MIN HUMIDITY.......
* VALLEYS..........22-32%.
* MID SLOPE........24-34%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........LIGHT WINDS BECOMING NORTH 10 TO 15 MPH IN THE
AFTERNOON.
* MIXING HEIGHT......1400-1900 FT AGL INCREASING TO 4300-5300 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....NORTH 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO VERY GOOD IN THE
AFTERNOON.
EXTENDED
FRIDAY NIGHT
CLEAR. PATCHY SMOKE IN THE EVENING. LOWS 36-46.
DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 68-78. LOWS 36-46. SLOPE WINDS.
SUNDAY
PARTLY CLOUDY. HIGHS 68-78. LOWS 39-49. SLOPE WINDS.
MONDAY
PARTLY CLOUDY. HIGHS 69-79. LOWS 43-53. SLOPE WINDS.
TUESDAY THROUGH WEDNESDAY
CLEAR. HIGHS 69-79. LOWS 41-51.
NVZ423-180030-
WEST HUMBOLDT BASIN IN PERSHING COUNTY-
1238 AM PDT THU SEP 17 2026
TODAY
* SKY/WEATHER........SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........72-80.
* MID SLOPE........67-77.
* 24 HR TREND......6 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........17-23%.
* MID SLOPE........17-25%.
* 24 HR TREND......6% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 10 TO 15 MPH. GUSTS TO 20 MPH IN
THE MORNING.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 25
MPH.
* MIXING HEIGHT......2100-3100 FT AGL INCREASING TO 8300-9300 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........40-50.
* MID SLOPE........41-51.
* 24 HR TREND......4 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........52-62%.
* MID SLOPE........37-47%.
* 24 HR TREND......14% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 8 TO 12 MPH IN THE EVENING BECOMING
DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 25
MPH.
* MIXING HEIGHT......4000-5000 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........SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........72-80.
* MID SLOPE........67-77.
* MIN HUMIDITY.......
* VALLEYS..........20-28%.
* MID SLOPE........21-31%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING NORTHWEST 8 TO 12
MPH IN THE AFTERNOON.
* RIDGE TOP........WEST WINDS 10 TO 15 MPH. GUSTS TO 20 MPH IN THE
MORNING THEN 25 MPH LATE IN THE AFTERNOON.
* MIXING HEIGHT......1600-2100 FT AGL INCREASING TO 6600-7600 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....NORTHWEST 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
CLEAR. LOWS 43-53. NORTHWEST WINDS 7 TO 12 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 77-83. LOWS 43-53. SLOPE WINDS.
SUNDAY THROUGH MONDAY
PARTLY CLOUDY. HIGHS 81-89. LOWS 45-55.
SLOPE WINDS.
TUESDAY
CLEAR. HIGHS 83-89. LOWS 48-58.
WEDNESDAY
SUNNY. HIGHS 83-89.
NVZ429-180030-
LAHONTAN BASIN INCLUDING CHURCHILL AND EASTERN MINERAL COUNTIES-
1238 AM PDT THU SEP 17 2026
TODAY
* SKY/WEATHER........SUNNY. PATCHY SMOKE IN THE MORNING.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........72-82.
* MID SLOPE........69-79.
* 24 HR TREND......4 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........11-21%.
* MID SLOPE........10-20%.
* 24 HR TREND......5% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING WEST 10 TO 15 MPH IN
THE AFTERNOON.
* RIDGE TOP........WEST WINDS 10 TO 15 MPH WITH GUSTS TO 25 MPH.
* MIXING HEIGHT......1900-2900 FT AGL INCREASING TO 8200-9200 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTHWEST 15 TO 20 MPH IN
THE AFTERNOON.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR. PATCHY SMOKE.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........39-49.
* MID SLOPE........42-52.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........53-63%.
* MID SLOPE........37-47%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....NORTHWEST WINDS 10 TO 15 MPH SHIFTING TO THE WEST
5 TO 10 MPH IN THE MORNING. GUSTS TO 25 MPH.
* RIDGE TOP........NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 30
MPH.
* MIXING HEIGHT......4000-5000 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....NORTHWEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO MARGINAL AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER........SUNNY. PATCHY SMOKE IN THE MORNING.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........70-80.
* MID SLOPE........67-77.
* MIN HUMIDITY.......
* VALLEYS..........14-24%.
* MID SLOPE........15-25%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING NORTHWEST 9 TO 14
MPH IN THE LATE MORNING AND AFTERNOON.
* RIDGE TOP........NORTHWEST WINDS 10 TO 15 MPH. GUSTS TO 20 MPH IN
THE MORNING THEN 25 MPH IN THE AFTERNOON.
* MIXING HEIGHT......1600-2100 FT AGL INCREASING TO 6000-7000 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....NORTHWEST 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
CLEAR. LOWS 42-52. NORTHWEST WINDS 9 TO 14 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 75-85. LOWS 42-52. SLOPE WINDS.
SUNDAY
PARTLY CLOUDY. HIGHS 78-88. LOWS 44-54. SLOPE WINDS.
MONDAY
PARTLY CLOUDY. HIGHS 79-89. LOWS 47-57. SLOPE WINDS.
TUESDAY
CLEAR. HIGHS 80-90. LOWS 46-56.
WEDNESDAY
SUNNY. HIGHS 81-91.
CAZ270-278-NVZ458-180030-
SURPRISE VALLEY CALIFORNIA-EASTERN LASSEN COUNTY-
NORTHERN WASHOE COUNTY-
1238 AM PDT THU SEP 17 2026
TODAY
* SKY/WEATHER........PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS.
* CHANCE OF THUNDER..20%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........65-75.
* MID SLOPE........61-69.
* 24 HR TREND......6 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........12-22%.
* MID SLOPE........19-29%.
* 24 HR TREND......8% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 9 TO 15
MPH IN THE LATE MORNING AND AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 30
MPH.
* MIXING HEIGHT......2100-3100 FT AGL INCREASING TO 7300-8300 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 10 TO 20 MPH.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS
IN THE EVENING.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MIN TEMPERATURE....
* VALLEYS..........35-45.
* MID SLOPE........36-46.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........75-85%.
* MID SLOPE........67-77%.
* 24 HR TREND......18% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 9 TO 16 MPH WITH GUSTS TO 25 MPH
BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........NORTHWEST WINDS 10 TO 15 MPH. GUSTS TO 25 MPH
UNTIL EARLY MORNING.
* MIXING HEIGHT......3900-4900 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........69-79.
* MID SLOPE........64-74.
* MIN HUMIDITY.......
* VALLEYS..........17-27%.
* MID SLOPE........22-32%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING NORTHWEST 8 TO 13
MPH WITH GUSTS TO 20 MPH IN THE AFTERNOON.
* RIDGE TOP........NORTHWEST WINDS 10 TO 15 MPH.
* MIXING HEIGHT......1500-2000 FT AGL INCREASING TO 6400-7400 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....NORTHWEST 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
CLEAR. LOWS 36-46. NORTHWEST WINDS 8 TO 13 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 73-83. LOWS 36-46. SLOPE WINDS.
SUNDAY
PARTLY CLOUDY. HIGHS 76-86. LOWS 40-50. SLOPE WINDS.
MONDAY
CLEAR. HIGHS 78-87. LOWS 41-51. SLOPE WINDS.
TUESDAY THROUGH WEDNESDAY
CLEAR. HIGHS 78-88. LOWS 40-50.
CAZ271-180030-
WESTERN LASSEN, EASTERN PLUMAS, AND EASTERN SIERRA COUNTIES-
1238 AM PDT THU SEP 17 2026
TODAY
* SKY/WEATHER........MOSTLY SUNNY. SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* CHANCE OF THUNDER..20%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........60-70.
* MID SLOPE........57-67.
* 24 HR TREND......6 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........24-34%.
* MID SLOPE........24-34%.
* 24 HR TREND......8% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING WEST 8 TO 13 MPH
WITH GUSTS TO 20 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO 30
MPH.
* MIXING HEIGHT......1900-2900 FT AGL INCREASING TO 5800-6800 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........MOSTLY CLEAR. SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MIN TEMPERATURE....
* VALLEYS..........29-39.
* MID SLOPE........35-45.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........78-88%.
* MID SLOPE........62-72%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 7 TO 12 MPH WITH GUSTS TO 20 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS.
* MIXING HEIGHT......2900-3900 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........VERY GOOD DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........67-77.
* MID SLOPE........65-73.
* MIN HUMIDITY.......
* VALLEYS..........22-32%.
* MID SLOPE........22-32%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........NORTH WINDS 10 TO 15 MPH.
* MIXING HEIGHT......1400-1900 FT AGL INCREASING TO 6200-7200 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....NORTH 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
CLEAR. LOWS 33-43. DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 73-83. LOWS 33-43. SLOPE WINDS.
SUNDAY
PARTLY CLOUDY. HIGHS 75-85. LOWS 37-47. SLOPE WINDS.
MONDAY
CLEAR. HIGHS 77-87. LOWS 39-49. SLOPE WINDS.
TUESDAY THROUGH WEDNESDAY
CLEAR. HIGHS 76-86. LOWS 37-47.
CAZ274-180030-
SOUTHERN MONO COUNTY-
1238 AM PDT THU SEP 17 2026
TODAY
* SKY/WEATHER........SUNNY. PATCHY SMOKE IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........64-74.
* MID SLOPE........61-71.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........8-18%.
* MID SLOPE........11-21%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 17 MPH. GUSTS TO 25 MPH
INCREASING TO 30 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH. GUSTS TO 50 MPH
DECREASING TO 35 MPH IN THE AFTERNOON.
* MIXING HEIGHT......1700-2700 FT AGL INCREASING TO 5700-6700 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH INCREASING TO 20 TO 30
MPH IN THE AFTERNOON.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR. SMOKE IN THE EVENING. PATCHY SMOKE
AFTER MIDNIGHT.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........32-42.
* MID SLOPE........33-43.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........53-63%.
* MID SLOPE........39-49%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 12 TO 18 MPH WITH GUSTS TO 30
MPH BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........WEST WINDS 10 TO 15 MPH WITH GUSTS TO 30 MPH.
* MIXING HEIGHT......3000-4000 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....WEST 10 TO 20 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........SUNNY. PATCHY SMOKE.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........64-74.
* MID SLOPE........60-70.
* MIN HUMIDITY.......
* VALLEYS..........12-22%.
* MID SLOPE........15-25%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING NORTHEAST 5 TO 10
MPH WITH GUSTS TO 20 MPH LATE IN THE
AFTERNOON.
* RIDGE TOP........WEST WINDS 10 TO 15 MPH WITH GUSTS TO 25 MPH
SHIFTING TO THE NORTH IN THE AFTERNOON.
* MIXING HEIGHT......1600-2100 FT AGL INCREASING TO 6100-7100 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....NORTHWEST 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
CLEAR. LOWS 34-44. NORTH WINDS 8 TO 13 MPH IN THE
EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
CLEAR. HIGHS 69-79. LOWS 34-44. SLOPE WINDS.
SUNDAY
PARTLY CLOUDY. HIGHS 69-79. LOWS 40-50. SLOPE WINDS.
MONDAY
PARTLY CLOUDY. HIGHS 68-78. LOWS 39-49. SLOPE WINDS.
TUESDAY
CLEAR. HIGHS 69-79. LOWS 38-48.
WEDNESDAY
SUNNY. HIGHS 71-81.
.8 TO 14 DAY OUTLOOK FOR (THU SEP 24 THROUGH WED SEP 30)
ABOVE NORMAL TEMPERATURES AND PRECIPITATION.
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