296
FNUS55 KREV 170903
FWFREV
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE RENO NV
103 AM PST WED DEC 17 2025
..WIND ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON
...ELEVATED FIRE WEATHER CONDITIONS IN MONO, WESTERN MINERAL AND
SOUTHERN LYON COUNTY DUE TO GUSTY WINDS AND LOW HUMIDITY...
DISCUSSION
PERIODS OF RAIN, HIGH ELEVATION SNOW, AND GUSTY WINDS ARE EXPECTED
TODAY. THE INCREASED WINDS WILL BRING ELEVATED FIRE CONCERNS FOR
MONO COUNTY AND VICINITY DUE TO THE GUSTY WINDS AND RELATIVELY LOW
HUMIDITY VALUES. CHANCES OF VALLEY RAIN AND MOUNTAIN SNOW, AS WELL
AS GUSTY WINDS RETURN FRIDAY THROUGH THE WEEKEND, ESPECIALLY FOR THE
SIERRA AND NE CA. TEMPERATURES APPEAR TO REMAIN UNSEASONABLE WARM
THROUGH EARLY 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
NVZ420-180100-
NORTHERN SIERRA FRONT INCLUDING CARSON CITY, DOUGLAS, STOREY,
SOUTHERN WASHOE, WESTERN LYON, AND FAR SOUTHERN LASSEN COUNTIES-
103 AM PST WED DEC 17 2025
..WIND ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON
TODAY
* SKY/WEATHER........MOSTLY CLOUDY THEN BECOMING SUNNY. CHANCE OF
RAIN IN THE MORNING.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........53-63.
* MID SLOPE........49-59.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........35-45%.
* MID SLOPE........29-39%.
* 24 HR TREND......5% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 20 TO 35 MPH WITH GUSTS TO 60
MPH.
* RIDGE TOP........WEST WINDS 25 TO 40 MPH WITH GUSTS TO 70 MPH.
* CHC WETTING RAIN...25%.
* MIXING HEIGHT......1100-1600 FT AGL INCREASING TO 2300-3300 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 30 TO 40 MPH.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........29-39.
* MID SLOPE........34-41.
* 24 HR TREND......8 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........65-75%.
* MID SLOPE........38-48%.
* 24 HR TREND......15% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 10 TO 16 MPH WITH GUSTS TO 30 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........WEST WINDS 20 TO 30 MPH WITH GUSTS TO 55 MPH.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......800-1300 FT AGL DECREASING TO 600-800 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........FAIR DECREASING TO MARGINAL AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........56-66.
* MID SLOPE........53-63.
* MIN HUMIDITY.......
* VALLEYS..........36-46%.
* MID SLOPE........36-46%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 15 MPH. GUSTS TO 25 MPH
LATE IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO 50
MPH INCREASING TO 20 TO 30 MPH WITH GUSTS TO
50 MPH LATE IN THE AFTERNOON.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......600-800 FT AGL INCREASING TO 1700-2200 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH.
* VENTILATION........MARGINAL INCREASING TO EXCELLENT IN THE
AFTERNOON.
EXTENDED
THURSDAY NIGHT
PARTLY CLOUDY. LOWS 34-44. SOUTHWEST WINDS 9 TO
16 MPH.
FRIDAY
RAIN LIKELY. HIGHS 53-63. LOWS 34-44. SOUTHWEST WINDS
10 TO 20 MPH.
SATURDAY
MOSTLY CLOUDY. CHANCE OF RAIN. HIGHS 50-60. LOWS 35-45.
SOUTHWEST WINDS 10 TO 15 MPH.
SUNDAY
RAIN LIKELY. HIGHS 50-58. LOWS 34-44. SOUTHWEST WINDS
10 TO 20 MPH.
MONDAY
MOSTLY CLOUDY. CHANCE OF RAIN. HIGHS 47-57. LOWS 29-39.
TUESDAY
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW. HIGHS 48-57.
NVZ421-180100-
SOUTHERN SIERRA FRONT INCLUDING ALPINE, NORTHERN MONO, SOUTHERN
LYON, AND WESTERN MINERAL COUNTIES-
103 AM PST WED DEC 17 2025
..WIND ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON
TODAY
* SKY/WEATHER........MOSTLY CLOUDY THEN BECOMING SUNNY. CHANCE OF
RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........52-62.
* MID SLOPE........46-56.
* 24 HR TREND......4 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........23-33%.
* MID SLOPE........18-28%.
* 24 HR TREND......9% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 20 TO 35 MPH WITH GUSTS TO 60
MPH.
* RIDGE TOP........SOUTHWEST WINDS 30 TO 45 MPH WITH GUSTS TO 85
MPH.
* CHC WETTING RAIN...40%.
* MIXING HEIGHT......1100-1600 FT AGL INCREASING TO 1900-2900 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 25 TO 35 MPH INCREASING TO 35 TO 45 MPH
IN THE AFTERNOON.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........27-37.
* MID SLOPE........32-42.
* 24 HR TREND......5 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........54-64%.
* MID SLOPE........42-52%.
* 24 HR TREND......26% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 10 TO 17 MPH WITH GUSTS TO 30
MPH DECREASING TO 8 TO 13 MPH WITH GUSTS TO 20
MPH IN THE LATE EVENING AND OVERNIGHT.
* RIDGE TOP........SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 60
MPH INCREASING TO WEST 30 TO 45 MPH WITH GUSTS
TO 65 MPH AFTER MIDNIGHT.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......800 FT AGL.
* TRANSPORT WINDS....WEST 10 TO 20 MPH.
* VENTILATION........FAIR.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........56-66.
* MID SLOPE........51-61.
* MIN HUMIDITY.......
* VALLEYS..........34-44%.
* MID SLOPE........34-44%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 14 MPH WITH GUSTS TO 25
MPH.
* RIDGE TOP........SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 55
MPH.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......600-900 FT AGL INCREASING TO 1700-2200 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 10 TO 15 MPH INCREASING TO 15 TO 25 MPH
IN THE AFTERNOON.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
PARTLY CLOUDY. LOWS 30-40. SOUTHWEST WINDS 9 TO
16 MPH.
FRIDAY
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW. HIGHS 54-64. LOWS
30-40. SOUTHWEST WINDS 10 TO 20 MPH.
SATURDAY THROUGH SUNDAY
RAIN AND SNOW LIKELY. HIGHS 50-60. LOWS
30-40. SOUTHWEST WINDS 10 TO 20 MPH.
MONDAY THROUGH TUESDAY
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW.
HIGHS 48-58. LOWS 24-34.
CAZ272-180100-
GREATER LAKE TAHOE AND TRUCKEE AREA-
103 AM PST WED DEC 17 2025
..WIND ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON
TODAY
* SKY/WEATHER........PARTLY CLOUDY. SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE MORNING, THEN CHANCE OF
RAIN IN THE AFTERNOON.
* CHANCE OF THUNDER..20%.
* MAX TEMPERATURE....
* VALLEYS..........42-47.
* MID SLOPE........40-48.
* 24 HR TREND......6 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........41-51%.
* MID SLOPE........29-39%.
* 24 HR TREND......18% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 20 TO 35 MPH. GUSTS TO 65 MPH
DECREASING TO 45 MPH LATE IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 30 TO 45 MPH. GUSTS TO 85 MPH
DECREASING TO 70 MPH LATE IN THE AFTERNOON.
* CHC WETTING RAIN...55%.
* MIXING HEIGHT......900-1400 FT AGL INCREASING TO 1400-1900 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 35 TO 45 MPH.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR THEN BECOMING PARTLY CLOUDY. SLIGHT
CHANCE OF SNOW IN THE EVENING.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........27-37.
* MID SLOPE........28-38.
* 24 HR TREND......7 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........64-74%.
* MID SLOPE........46-56%.
* 24 HR TREND......32% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 12 TO 17 MPH WITH GUSTS TO 30
MPH DECREASING TO 8 TO 13 MPH WITH GUSTS TO 20
MPH IN THE LATE EVENING AND OVERNIGHT.
* RIDGE TOP........SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 55
MPH INCREASING TO 30 TO 45 MPH WITH GUSTS TO
65 MPH AFTER MIDNIGHT.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......600-1100 FT AGL.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH.
* VENTILATION........FAIR.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN IN THE
AFTERNOON.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........48-54.
* MID SLOPE........43-53.
* MIN HUMIDITY.......
* VALLEYS..........55-65%.
* MID SLOPE........46-56%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 15 MPH WITH GUSTS TO 25
MPH.
* RIDGE TOP........SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 65
MPH INCREASING TO 25 TO 40 MPH WITH GUSTS TO
60 MPH IN THE AFTERNOON.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......600-800 FT AGL INCREASING TO 1300-1800 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH INCREASING TO 20 TO 30
MPH IN THE AFTERNOON.
* VENTILATION........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN. SLIGHT
CHANCE OF SNOW AFTER MIDNIGHT. LOWS 30-40. SOUTHWEST WINDS 9 TO
17 MPH INCREASING TO 15 TO 25 MPH AFTER MIDNIGHT.
FRIDAY
RAIN AND SNOW. HIGHS 43-51. LOWS 30-40. SOUTHWEST WINDS
10 TO 20 MPH.
SATURDAY
RAIN AND SNOW LIKELY. HIGHS 42-48. LOWS 30-40. SOUTHWEST
WINDS 10 TO 15 MPH.
SUNDAY
RAIN AND SNOW. HIGHS 41-47. LOWS 29-39. SOUTHWEST WINDS
10 TO 20 MPH.
MONDAY
RAIN AND SNOW LIKELY. HIGHS 39-45. LOWS 27-37.
TUESDAY
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW. HIGHS 40-46.
NVZ423-180100-
WEST HUMBOLDT BASIN IN PERSHING COUNTY-
103 AM PST WED DEC 17 2025
..WIND ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON
TODAY
* SKY/WEATHER........MOSTLY CLOUDY THEN BECOMING SUNNY. CHANCE OF
RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........57-63.
* MID SLOPE........51-61.
* 24 HR TREND......6 DEGREES WARMER.
* MIN HUMIDITY.......
* VALLEYS..........35-45%.
* MID SLOPE........39-49%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 50
MPH SHIFTING TO THE WEST 20 TO 35 MPH WITH
GUSTS TO 60 MPH IN THE LATE MORNING AND
AFTERNOON.
* RIDGE TOP........WEST WINDS 25 TO 40 MPH. GUSTS TO 80 MPH
DECREASING TO 60 MPH LATE IN THE AFTERNOON.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......1000-1500 FT AGL INCREASING TO 3600-4600 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 30 TO 40 MPH.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........31-40.
* MID SLOPE........33-40.
* 24 HR TREND......5 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........70-80%.
* MID SLOPE........52-62%.
* 24 HR TREND......5% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 9 TO 16 MPH WITH GUSTS TO 30 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH. GUSTS TO 50 MPH
DECREASING TO 45 MPH AFTER MIDNIGHT.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......700-1200 FT AGL DECREASING TO 600-700 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........FAIR DECREASING TO MARGINAL AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........55-60.
* MID SLOPE........51-61.
* MIN HUMIDITY.......
* VALLEYS..........27-37%.
* MID SLOPE........31-41%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTH 9 TO 15 MPH
WITH GUSTS TO 25 MPH IN THE LATE MORNING AND
AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO 55
MPH INCREASING TO 20 TO 30 MPH WITH GUSTS TO
55 MPH LATE IN THE AFTERNOON.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......600-700 FT AGL INCREASING TO 1100-1600 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 20 MPH.
* VENTILATION........MARGINAL INCREASING TO GOOD IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS 32-42. SOUTHWEST WINDS 9 TO
15 MPH.
FRIDAY
MOSTLY CLOUDY. CHANCE OF RAIN. HIGHS 56-62. LOWS 32-42.
SOUTHWEST WINDS 10 TO 20 MPH.
SATURDAY THROUGH SUNDAY
CLOUDY. CHANCE OF RAIN. HIGHS 52-59. LOWS
35-45. SOUTH WINDS 10 TO 15 MPH.
MONDAY THROUGH TUESDAY
MOSTLY CLOUDY. CHANCE OF RAIN. HIGHS
52-59. LOWS 31-41.
NVZ429-180100-
LAHONTAN BASIN INCLUDING CHURCHILL AND EASTERN MINERAL COUNTIES-
103 AM PST WED DEC 17 2025
..WIND ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON
TODAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING SUNNY. SLIGHT
CHANCE OF RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........58-66.
* MID SLOPE........54-62.
* 24 HR TREND......6 DEGREES WARMER.
* MIN HUMIDITY.......
* VALLEYS..........33-43%.
* MID SLOPE........33-43%.
* 24 HR TREND......6% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 15 TO 25 MPH SHIFTING TO THE
WEST 20 TO 30 MPH IN THE AFTERNOON. GUSTS TO
50 MPH.
* RIDGE TOP........WEST WINDS 20 TO 35 MPH WITH GUSTS TO 65 MPH.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......900-1400 FT AGL INCREASING TO 3500-4500 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 15 TO 25 MPH INCREASING TO WEST 30
TO 40 MPH IN THE AFTERNOON.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING CLEAR.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........28-38.
* MID SLOPE........33-42.
* 24 HR TREND......5 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........63-73%.
* MID SLOPE........41-51%.
* 24 HR TREND......9% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....NORTHWEST WINDS 9 TO 15 MPH WITH GUSTS TO 30 MPH
IN THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH. GUSTS TO 55 MPH
INCREASING TO 60 MPH IN THE MORNING.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......800 FT AGL.
* TRANSPORT WINDS....NORTHWEST 10 TO 15 MPH IN THE EVENING BECOMING
LIGHT.
* VENTILATION........FAIR.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........57-67.
* MID SLOPE........54-64.
* MIN HUMIDITY.......
* VALLEYS..........25-35%.
* MID SLOPE........27-37%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 9 TO 14 MPH.
* RIDGE TOP........SOUTHWEST WINDS 15 TO 25 MPH. GUSTS TO 55 MPH
DECREASING TO 40 MPH LATE IN THE AFTERNOON.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......600-700 FT AGL INCREASING TO 1100-1600 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO GOOD IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS 30-40. SOUTHWEST WINDS 9 TO
14 MPH.
FRIDAY
MOSTLY CLOUDY. CHANCE OF RAIN. HIGHS 58-68. LOWS 30-40.
SOUTHWEST WINDS 10 TO 15 MPH.
SATURDAY THROUGH SUNDAY
MOSTLY CLOUDY. CHANCE OF RAIN. HIGHS
53-63. LOWS 33-43. SOUTH WINDS 10 TO 20 MPH.
MONDAY THROUGH TUESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN.
HIGHS 52-62. LOWS 29-39.
CAZ270-278-NVZ458-180100-
SURPRISE VALLEY CALIFORNIA-EASTERN LASSEN COUNTY-
NORTHERN WASHOE COUNTY-
103 AM PST WED DEC 17 2025
..WIND ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON
TODAY
* SKY/WEATHER........PARTLY CLOUDY. RAIN IN THE MORNING, THEN
CHANCE OF RAIN AND SNOW IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........49-59.
* MID SLOPE........46-54.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........47-57%.
* MID SLOPE........50-60%.
* 24 HR TREND......8% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 20 TO 35 MPH. GUSTS TO 60 MPH
DECREASING TO 50 MPH LATE IN THE AFTERNOON.
* RIDGE TOP........WEST WINDS 25 TO 40 MPH WITH GUSTS TO 80 MPH.
* CHC WETTING RAIN...40%.
* MIXING HEIGHT......1200-1700 FT AGL INCREASING TO 2500-3500 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 30 TO 40 MPH.
* VENTILATION........EXCELLENT.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF SNOW AND A SLIGHT CHANCE OF RAIN
AFTER MIDNIGHT.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........27-37.
* MID SLOPE........28-38.
* 24 HR TREND......8 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........80-90%.
* MID SLOPE........71-81%.
* 24 HR TREND......7% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 10 TO 17 MPH WITH GUSTS TO 30 MPH IN
THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........WEST WINDS 20 TO 30 MPH WITH GUSTS TO 50 MPH.
* CHC WETTING RAIN...10%.
* MIXING HEIGHT......800-1300 FT AGL DECREASING TO 600-700 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........FAIR DECREASING TO MARGINAL AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
CHANCE OF RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........51-61.
* MID SLOPE........47-57.
* MIN HUMIDITY.......
* VALLEYS..........38-48%.
* MID SLOPE........46-56%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 14 MPH WITH GUSTS TO 30 MPH
INCREASING TO 12 TO 18 MPH WITH GUSTS TO 35
MPH LATE IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 20 TO 35 MPH WITH GUSTS TO 60
MPH.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......600-800 FT AGL INCREASING TO 1600-2100 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH INCREASING TO WEST 20
TO 30 MPH IN THE AFTERNOON.
* VENTILATION........MARGINAL INCREASING TO VERY GOOD IN THE
AFTERNOON.
EXTENDED
THURSDAY NIGHT
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN. LOWS 33-42.
SOUTHWEST WINDS 10 TO 18 MPH.
FRIDAY
RAIN AND SNOW. HIGHS 46-56. LOWS 31-41. SOUTHWEST WINDS
15 TO 25 MPH.
SATURDAY
CLOUDY. CHANCE OF RAIN AND SNOW. HIGHS 45-55. LOWS
30-40. SOUTHWEST WINDS 10 TO 15 MPH.
SUNDAY
RAIN LIKELY. HIGHS 45-55. LOWS 30-40. SOUTHWEST WINDS
10 TO 20 MPH.
MONDAY THROUGH TUESDAY
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW.
HIGHS 44-54. LOWS 27-37.
CAZ271-180100-
WESTERN LASSEN, EASTERN PLUMAS, AND EASTERN SIERRA COUNTIES-
103 AM PST WED DEC 17 2025
..WIND ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON
TODAY
* SKY/WEATHER........PARTLY CLOUDY. RAIN IN THE MORNING, THEN
CHANCE OF RAIN IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........46-54.
* MID SLOPE........44-52.
* 24 HR TREND......4 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........55-65%.
* MID SLOPE........54-64%.
* 24 HR TREND......7% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 20 TO 30 MPH WITH GUSTS TO 50
MPH SHIFTING TO THE WEST 15 TO 25 MPH WITH
GUSTS TO 45 MPH IN THE AFTERNOON.
* RIDGE TOP........WEST WINDS 20 TO 35 MPH. GUSTS TO 70 MPH
DECREASING TO 55 MPH LATE IN THE AFTERNOON.
* CHC WETTING RAIN...55%.
* MIXING HEIGHT......1100-1600 FT AGL INCREASING TO 1900-2900 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 25 TO 35 MPH.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF RAIN. CHANCE OF SNOW AFTER
MIDNIGHT.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........25-35.
* MID SLOPE........29-39.
* 24 HR TREND......8 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........82-92%.
* MID SLOPE........66-76%.
* 24 HR TREND......6% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 9 TO 14 MPH IN THE EVENING BECOMING
DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO 50
MPH INCREASING TO 20 TO 30 MPH WITH GUSTS TO
55 MPH IN THE MORNING.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......600-1100 FT AGL.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........FAIR.
THURSDAY
* SKY/WEATHER........MOSTLY CLOUDY. CHANCE OF RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........47-57.
* MID SLOPE........46-56.
* MIN HUMIDITY.......
* VALLEYS..........46-56%.
* MID SLOPE........46-56%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 15 MPH. GUSTS TO 30 MPH IN
THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO 55
MPH INCREASING TO 20 TO 30 MPH WITH GUSTS TO
50 MPH LATE IN THE AFTERNOON.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......600-700 FT AGL INCREASING TO 1400-1900 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH INCREASING TO 15 TO 25
MPH IN THE AFTERNOON.
* VENTILATION........MARGINAL INCREASING TO VERY GOOD IN THE
AFTERNOON.
EXTENDED
THURSDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN. LOWS 29-39.
SOUTHWEST WINDS 9 TO 15 MPH.
FRIDAY
RAIN. HIGHS 42-52. LOWS 29-39. SOUTHWEST WINDS 10 TO
20 MPH.
SATURDAY
RAIN AND SNOW LIKELY. HIGHS 43-51. LOWS 29-39. SOUTHWEST
WINDS 10 TO 15 MPH.
SUNDAY
RAIN. HIGHS 43-51. LOWS 28-38. SOUTHWEST WINDS 10 TO
20 MPH.
MONDAY
RAIN AND SNOW LIKELY. HIGHS 41-49. LOWS 25-35.
TUESDAY
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW. HIGHS 42-50.
CAZ274-180100-
SOUTHERN MONO COUNTY-
103 AM PST WED DEC 17 2025
TODAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING SUNNY. SLIGHT
CHANCE OF RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........50-60.
* MID SLOPE........47-57.
* 24 HR TREND......4 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........31-41%.
* MID SLOPE........25-35%.
* 24 HR TREND......4% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 50
MPH SHIFTING TO THE WEST 20 TO 30 MPH WITH
GUSTS TO 60 MPH IN THE LATE MORNING AND
AFTERNOON.
* RIDGE TOP........WEST WINDS 25 TO 40 MPH. GUSTS TO 80 MPH
DECREASING TO 65 MPH IN THE AFTERNOON.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......900-1400 FT AGL INCREASING TO 1600-2600 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 25 TO 35 MPH.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........27-37.
* MID SLOPE........28-38.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........69-79%.
* MID SLOPE........43-53%.
* 24 HR TREND......15% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 9 TO 15 MPH WITH GUSTS TO 30 MPH
DECREASING TO 7 TO 12 MPH IN THE LATE EVENING
AND OVERNIGHT.
* RIDGE TOP........WEST WINDS 15 TO 25 MPH WITH GUSTS TO 50 MPH
INCREASING TO 25 TO 35 MPH WITH GUSTS TO 55
MPH AFTER MIDNIGHT.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......600-1100 FT AGL.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........FAIR.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........54-64.
* MID SLOPE........51-61.
* MIN HUMIDITY.......
* VALLEYS..........25-35%.
* MID SLOPE........32-42%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 8 TO 13 MPH. GUSTS TO 20 MPH
LATE IN THE AFTERNOON.
* RIDGE TOP........WEST WINDS 15 TO 25 MPH. GUSTS TO 50 MPH
DECREASING TO 35 MPH IN THE AFTERNOON.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......600-1000 FT AGL INCREASING TO 1200-1700 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO GOOD IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
PARTLY CLOUDY. LOWS 28-38. SOUTHWEST WINDS 9 TO
15 MPH.
FRIDAY
PARTLY CLOUDY. CHANCE OF RAIN AND SNOW. HIGHS 52-62. LOWS
28-38. SOUTHWEST WINDS 10 TO 20 MPH.
SATURDAY THROUGH SUNDAY
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW.
HIGHS 47-57. LOWS 27-37. SOUTHWEST WINDS 10 TO 20 MPH.
MONDAY THROUGH TUESDAY
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW.
HIGHS 45-55. LOWS 23-33.
.8 TO 14 DAY OUTLOOK FOR (WED DEC 24 THROUGH TUE DEC 30)
ABOVE NORMAL TEMPERATURES AND PRECIPITATION.
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