536
FNUS55 KREV 172003
FWFREV
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE RENO NV
103 PM PDT WED SEP 17 2025
DISCUSSION
WARM AND DRY WEATHER TODAY, WITH POOR RH RECOVERY THOUGH VALLEY AND
MIDSLOPE AREAS OVERNIGHT TONIGHT.
SOME UNCERTAINTY WITH WEATHER FROM
THURSDAY ONWARD. SOME GUIDANCE HAS SHOWER AND STORM ACTIVITY IN
SIERRAS AND SOUTHWEST NEVADA AS EARLY AS THURSDAY AFTERNOON, OTHER
GUIDANCE HAS IT ON FROM FRIDAY. UNCERTAINTY WITH PRECIPATION AMOUNTS
AS WELL. SOME GUIDANCE KEEPS THE HEAVIST ACTIVITY WEST OF THE SIERRA
CREST, IN WHICH CASE EXPECT CLOUDY CONDITIONS WITH LIGHER RAIN AND
THE ODD ISOLATED STORM. OTHER GUIDANCE BRINGS MORE MOISTURE INTO THE
AREA, WHICH MAY LEAD TO A FLOOD WATCH AND POTENTIAL FLASH FLOODING.
EITHER WAY, GENERALLY MILD FIRE WEATHER CONDITIONS, ALTHOUGH DRY
LIGHTNING OUTSIDE OF RAIN CORES, AND GUSTY OUTFLOWS REMAINS A SLIGHT
RISK.
SHOWER AND THUNDERSTORM RISK CONTINUES SATURDAY, ALTHOUGH UNCERTAINTY
IN COVERAGE REMAINS HIGH.
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
NVZ420-181430-
NORTHERN SIERRA FRONT INCLUDING CARSON CITY, DOUGLAS, STOREY,
SOUTHERN WASHOE, WESTERN LYON, AND FAR SOUTHERN LASSEN COUNTIES-
103 PM PDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER........CLEAR THEN BECOMING MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........49-59.
* MID SLOPE........52-62.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........32-42%.
* MID SLOPE........21-31%.
* 24 HR TREND......6% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......3800-4800 FT AGL DECREASING TO 600-900 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........VERY GOOD DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........78-88.
* MID SLOPE........74-84.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........8-18%.
* MID SLOPE........11-20%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING EAST 7 TO 12 MPH IN
THE AFTERNOON.
* RIDGE TOP........EAST WINDS 10 TO 15 MPH. GUSTS TO 20 MPH EARLY
IN THE AFTERNOON.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......800-1300 FT AGL INCREASING TO 5900-6900 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTHEAST 10 TO 15 MPH IN
THE AFTERNOON.
* VENTILATION........MARGINAL INCREASING TO EXCELLENT IN THE
AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........CLOUDY. CHANCE OF SHOWERS.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........50-60.
* MID SLOPE........51-61.
* MAX HUMIDITY.......
* VALLEYS..........64-74%.
* MID SLOPE........49-59%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 7 TO 12 MPH.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH WITH GUSTS TO 25 MPH.
* CHC WETTING RAIN...10%.
* MIXING HEIGHT......3600-4600 FT AGL DECREASING TO 800-1300 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTH 15 TO 25 MPH SHIFTING TO THE SOUTHEAST
10 TO 15 MPH AFTER MIDNIGHT.
* VENTILATION........EXCELLENT DECREASING TO FAIR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........MOSTLY CLOUDY. CHANCE OF SHOWERS. SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* CHANCE OF THUNDER..20%.
* MAX TEMPERATURE....
* VALLEYS..........67-77.
* MID SLOPE........64-74.
* MIN HUMIDITY.......
* VALLEYS..........28-38%.
* MID SLOPE........37-47%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH.
* CHC WETTING RAIN...25%.
* MIXING HEIGHT......700-1200 FT AGL INCREASING TO 2000-3000 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........MARGINAL INCREASING TO FAIR IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING PARTLY
CLOUDY. CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN
THE EVENING. LOWS 46-56. DOWNSLOPE 2 TO 5 MPH.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 71-81.
LOWS 46-56. SLOPE WINDS.
SUNDAY THROUGH MONDAY
CLEAR. HIGHS 75-85. LOWS 46-56. SLOPE
WINDS.
TUESDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS. HIGHS 75-85. LOWS
47-57.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 68-78.
NVZ421-181430-
SOUTHERN SIERRA FRONT INCLUDING ALPINE, NORTHERN MONO, SOUTHERN
LYON, AND WESTERN MINERAL COUNTIES-
103 PM PDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........42-52.
* MID SLOPE........53-63.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........34-44%.
* MID SLOPE........22-32%.
* 24 HR TREND......8% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....NORTHEAST WINDS 8 TO 13 MPH IN THE EVENING
BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........NORTHEAST WINDS 10 TO 15 MPH.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......4200-5200 FT AGL DECREASING TO 600-900 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........EXCELLENT DECREASING TO MARGINAL AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER........CLOUDY. CHANCE OF SHOWERS IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........73-83.
* MID SLOPE........66-76.
* 24 HR TREND......5 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........12-22%.
* MID SLOPE........12-22%.
* 24 HR TREND......6% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHEAST 9 TO 14
MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHEAST WINDS 10 TO 15 MPH WITH GUSTS TO 25
MPH.
* CHC WETTING RAIN...10%.
* MIXING HEIGHT......1300-1800 FT AGL INCREASING TO 5900-6900 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTHEAST 15 TO 20 MPH IN
THE AFTERNOON.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........CLOUDY. CHANCE OF SHOWERS.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........40-50.
* MID SLOPE........49-59.
* MAX HUMIDITY.......
* VALLEYS..........73-83%.
* MID SLOPE........54-64%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 9 TO 14 MPH UNTIL EARLY MORNING
BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTH WINDS 15 TO 25 MPH.
* CHC WETTING RAIN...25%.
* MIXING HEIGHT......1500-2500 FT AGL DECREASING TO 700-1200 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHEAST 10 TO 15 MPH.
* VENTILATION........VERY GOOD DECREASING TO MARGINAL AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER........CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON.
* CHANCE OF THUNDER..20%.
* MAX TEMPERATURE....
* VALLEYS..........66-76.
* MID SLOPE........59-69.
* MIN HUMIDITY.......
* VALLEYS..........34-44%.
* MID SLOPE........36-46%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTH 7 TO 12 MPH IN
THE AFTERNOON.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH WITH GUSTS TO 30 MPH.
* CHC WETTING RAIN...45%.
* MIXING HEIGHT......600-1100 FT AGL INCREASING TO 2500-3500 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO GOOD IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING PARTLY
CLOUDY. CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN
THE EVENING. LOWS 36-46. DOWNSLOPE 2 TO 5 MPH.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 70-80.
LOWS 36-46. SLOPE WINDS.
SUNDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS. HIGHS 72-82. LOWS 37-47.
SLOPE WINDS.
MONDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS. HIGHS 76-86. LOWS 38-48.
SLOPE WINDS.
TUESDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS. HIGHS 74-84. LOWS
38-48.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 69-79.
CAZ272-181430-
GREATER LAKE TAHOE AND TRUCKEE AREA-
103 PM PDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........44-54.
* MID SLOPE........47-57.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........50-60%.
* MID SLOPE........28-38%.
* 24 HR TREND......10% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS BECOMING EAST 10 TO 15 MPH AFTER
MIDNIGHT.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......3500-4500 FT AGL DECREASING TO 600-800 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........GOOD DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........69-79.
* MID SLOPE........67-77.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........18-28%.
* MID SLOPE........16-26%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........SOUTHEAST WINDS 10 TO 15 MPH.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......800-1300 FT AGL INCREASING TO 6200-7200 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHEAST 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO EXCELLENT IN THE
AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........CLOUDY. CHANCE OF SHOWERS.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........41-51.
* MID SLOPE........44-54.
* MAX HUMIDITY.......
* VALLEYS..........88-98%.
* MID SLOPE........67-77%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH SHIFTING TO THE
SOUTHEAST 10 TO 20 MPH IN THE LATE EVENING AND
OVERNIGHT. GUSTS TO 30 MPH INCREASING TO 35
MPH AFTER MIDNIGHT.
* CHC WETTING RAIN...20%.
* MIXING HEIGHT......1800-2800 FT AGL DECREASING TO 600-1100 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHEAST 10 TO 20 MPH.
* VENTILATION........VERY GOOD DECREASING TO MARGINAL AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER........CLOUDY. CHANCE OF SHOWERS. SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* CHANCE OF THUNDER..20%.
* MAX TEMPERATURE....
* VALLEYS..........58-68.
* MID SLOPE........55-65.
* MIN HUMIDITY.......
* VALLEYS..........54-64%.
* MID SLOPE........54-64%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH WITH GUSTS TO 25 MPH.
* CHC WETTING RAIN...40%.
* MIXING HEIGHT......600-900 FT AGL INCREASING TO 1400-1900 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO GOOD IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING PARTLY
CLOUDY. CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN
THE EVENING. LOWS 38-48. DOWNSLOPE 2 TO 5 MPH.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 63-73.
LOWS 38-48. SLOPE WINDS.
SUNDAY
CLEAR. HIGHS 66-76. LOWS 38-48. SLOPE WINDS.
MONDAY
CLEAR. HIGHS 69-79. LOWS 39-49. SLOPE WINDS.
TUESDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS. HIGHS 66-76. LOWS
40-50.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 59-69.
NVZ423-181430-
WEST HUMBOLDT BASIN IN PERSHING COUNTY-
103 PM PDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER........CLEAR THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........48-58.
* MID SLOPE........52-62.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........22-32%.
* MID SLOPE........15-25%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....NORTHEAST WINDS 7 TO 12 MPH.
* RIDGE TOP........LIGHT WINDS.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......3400-4400 FT AGL DECREASING TO 600-800 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........GOOD DECREASING TO MARGINAL AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........84-90.
* MID SLOPE........78-88.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........8-13%.
* MID SLOPE........10-15%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....NORTHEAST WINDS 7 TO 12 MPH IN THE MORNING
BECOMING UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........LIGHT WINDS.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......700-1200 FT AGL INCREASING TO 5700-6700 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........MARGINAL INCREASING TO VERY GOOD IN THE
AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........CLOUDY.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........55-64.
* MID SLOPE........56-64.
* MAX HUMIDITY.......
* VALLEYS..........39-49%.
* MID SLOPE........32-42%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 7 TO 12 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH. GUSTS TO 25 MPH IN
THE LATE EVENING AND OVERNIGHT.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......3800-4800 FT AGL DECREASING TO 600-1000 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO FAIR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........74-82.
* MID SLOPE........70-80.
* MIN HUMIDITY.......
* VALLEYS..........25-35%.
* MID SLOPE........27-37%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 7 TO 12
MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......600-900 FT AGL INCREASING TO 3200-4200 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO GOOD IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING. LOWS 50-59. DOWNSLOPE 2 TO 5 MPH.
SATURDAY
PARTLY CLOUDY. HIGHS 78-84. LOWS 49-59. SLOPE WINDS.
SUNDAY
CLEAR. HIGHS 80-86. LOWS 49-58. SLOPE WINDS.
MONDAY
CLEAR. HIGHS 83-89. LOWS 49-59. SLOPE WINDS.
TUESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS. HIGHS 82-90. LOWS
50-60.
WEDNESDAY
PARTLY CLOUDY. HIGHS 76-82.
NVZ429-181430-
LAHONTAN BASIN INCLUDING CHURCHILL AND EASTERN MINERAL COUNTIES-
103 PM PDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........50-60.
* MID SLOPE........54-64.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........22-32%.
* MID SLOPE........16-26%.
* 24 HR TREND......4% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....NORTH WINDS 9 TO 14 MPH IN THE EVENING BECOMING
DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......3700-4700 FT AGL DECREASING TO 600-800 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....NORTHEAST 10 TO 15 MPH.
* VENTILATION........VERY GOOD DECREASING TO MARGINAL AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........79-89.
* MID SLOPE........75-85.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........8-18%.
* MID SLOPE........9-19%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHEAST 9 TO 14
MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH. GUSTS TO 25 MPH IN THE
LATE MORNING AND AFTERNOON.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......800-1300 FT AGL INCREASING TO 5700-6700 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHEAST 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........CLOUDY. SLIGHT CHANCE OF SHOWERS.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........52-62.
* MID SLOPE........54-64.
* MAX HUMIDITY.......
* VALLEYS..........54-64%.
* MID SLOPE........37-47%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 9 TO 14 MPH.
* RIDGE TOP........SOUTH WINDS 10 TO 20 MPH WITH GUSTS TO 35 MPH.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......2800-3800 FT AGL DECREASING TO 600-1100 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTH 15 TO 25 MPH DECREASING TO 10 TO 15 MPH
AFTER MIDNIGHT.
* VENTILATION........EXCELLENT DECREASING TO FAIR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........MOSTLY CLOUDY. CHANCE OF SHOWERS. SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* CHANCE OF THUNDER..20%.
* MAX TEMPERATURE....
* VALLEYS..........72-82.
* MID SLOPE........67-77.
* MIN HUMIDITY.......
* VALLEYS..........30-40%.
* MID SLOPE........31-41%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 7 TO 12 MPH.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH WITH GUSTS TO 30 MPH.
* CHC WETTING RAIN...25%.
* MIXING HEIGHT......600-1000 FT AGL INCREASING TO 2900-3900 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO GOOD IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING PARTLY
CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. LOWS 51-60.
SOUTHWEST WINDS 5 TO 10 MPH IN THE EVENING BECOMING DOWNSLOPE 2 TO
5 MPH.
SATURDAY
PARTLY CLOUDY. HIGHS 75-85. LOWS 50-60. SLOPE WINDS.
SUNDAY
CLEAR. HIGHS 77-87. LOWS 49-59. SLOPE WINDS.
MONDAY
CLEAR. HIGHS 81-91. LOWS 49-59. SLOPE WINDS.
TUESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 80-90.
LOWS 50-60.
WEDNESDAY
SUNNY. HIGHS 75-85.
CAZ270-278-NVZ458-181430-
SURPRISE VALLEY CALIFORNIA-EASTERN LASSEN COUNTY-
NORTHERN WASHOE COUNTY-
103 PM PDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER........CLEAR THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........45-55.
* MID SLOPE........51-61.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........31-41%.
* MID SLOPE........23-33%.
* 24 HR TREND......5% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......3800-4800 FT AGL DECREASING TO 600-700 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........GOOD DECREASING TO MARGINAL AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........80-90.
* MID SLOPE........77-85.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........9-16%.
* MID SLOPE........10-15%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHEAST 7 TO 12
MPH WITH GUSTS TO 20 MPH IN THE AFTERNOON.
* RIDGE TOP........LIGHT WINDS.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......800-1300 FT AGL INCREASING TO 6500-7500 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHEAST 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO EXCELLENT IN THE
AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........CLOUDY. SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........49-59.
* MID SLOPE........49-59.
* MAX HUMIDITY.......
* VALLEYS..........48-58%.
* MID SLOPE........33-43%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 7 TO 12 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......4300-5300 FT AGL DECREASING TO 600-1100 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTH 10 TO 20 MPH.
* VENTILATION........EXCELLENT DECREASING TO FAIR AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........CLOUDY. SLIGHT CHANCE OF SHOWERS.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........70-80.
* MID SLOPE........68-76.
* MIN HUMIDITY.......
* VALLEYS..........21-31%.
* MID SLOPE........20-30%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........NORTH WINDS 10 TO 15 MPH SHIFTING TO THE
SOUTHEAST IN THE AFTERNOON.
* CHC WETTING RAIN...10%.
* MIXING HEIGHT......600-1100 FT AGL INCREASING TO 3200-4200 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....EAST 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO GOOD IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
EVENING. LOWS 45-55. WEST WINDS 7 TO 12 MPH UNTIL EARLY MORNING
BECOMING DOWNSLOPE 2 TO 5 MPH.
SATURDAY
PARTLY CLOUDY. HIGHS 73-83. LOWS 42-52. SLOPE WINDS.
SUNDAY
CLEAR. HIGHS 76-86. LOWS 42-52. SLOPE WINDS.
MONDAY
CLEAR. HIGHS 79-89. LOWS 42-52. SLOPE WINDS.
TUESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS. HIGHS 77-87. LOWS
44-54.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 68-78.
CAZ271-181430-
WESTERN LASSEN, EASTERN PLUMAS, AND EASTERN SIERRA COUNTIES-
103 PM PDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER........CLEAR THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........41-51.
* MID SLOPE........49-59.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........42-52%.
* MID SLOPE........30-40%.
* 24 HR TREND......8% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......3800-4800 FT AGL DECREASING TO 600-700 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........GOOD DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........77-87.
* MID SLOPE........75-83.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........11-21%.
* MID SLOPE........12-20%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........SOUTHEAST WINDS 10 TO 15 MPH.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......800-1300 FT AGL INCREASING TO 7000-8000 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHEAST 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO EXCELLENT IN THE
AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........CLOUDY. SLIGHT CHANCE OF SHOWERS.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........42-52.
* MID SLOPE........47-57.
* MAX HUMIDITY.......
* VALLEYS..........70-80%.
* MID SLOPE........54-64%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 15 MPH. GUSTS TO 25 MPH IN
THE LATE EVENING AND OVERNIGHT.
* CHC WETTING RAIN...10%.
* MIXING HEIGHT......3200-4200 FT AGL DECREASING TO 600-900 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO MARGINAL AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER........CLOUDY. CHANCE OF SHOWERS. SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* CHANCE OF THUNDER..20%.
* MAX TEMPERATURE....
* VALLEYS..........65-75.
* MID SLOPE........62-72.
* MIN HUMIDITY.......
* VALLEYS..........32-42%.
* MID SLOPE........35-45%.
* 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.
* CHC WETTING RAIN...25%.
* MIXING HEIGHT......600-900 FT AGL INCREASING TO 1600-2600 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........MARGINAL INCREASING TO FAIR IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY. CHANCE OF SHOWERS AND A SLIGHT CHANCE
OF THUNDERSTORMS IN THE EVENING. LOWS 38-48. DOWNSLOPE 2 TO 5 MPH.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 69-79.
LOWS 36-46. SLOPE WINDS.
SUNDAY THROUGH MONDAY
CLEAR. HIGHS 75-85. LOWS 36-46. SLOPE
WINDS.
TUESDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS. HIGHS 72-82. LOWS
38-48.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 63-73.
CAZ274-181430-
SOUTHERN MONO COUNTY-
103 PM PDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER........MOSTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........43-53.
* MID SLOPE........44-54.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........43-53%.
* MID SLOPE........28-38%.
* 24 HR TREND......7% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........NORTHEAST WINDS 10 TO 15 MPH.
* CHC WETTING RAIN...0%.
* MIXING HEIGHT......4700-5700 FT AGL DECREASING TO 600-1000 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........VERY GOOD DECREASING TO MARGINAL AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER........CLOUDY. CHANCE OF SHOWERS IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........65-75.
* MID SLOPE........62-72.
* 24 HR TREND......9 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........17-27%.
* MID SLOPE........18-28%.
* 24 HR TREND......14% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHEAST 8 TO 13
MPH WITH GUSTS TO 20 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHEAST WINDS 10 TO 20 MPH WITH GUSTS TO 30
MPH.
* CHC WETTING RAIN...20%.
* MIXING HEIGHT......1700-2700 FT AGL INCREASING TO 3000-4000 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTHEAST 15 TO 25 MPH IN
THE AFTERNOON.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
THURSDAY NIGHT
* SKY/WEATHER........CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING. CHANCE OF SHOWERS.
* CHANCE OF THUNDER..10%.
* MIN TEMPERATURE....
* VALLEYS..........39-49.
* MID SLOPE........40-50.
* MAX HUMIDITY.......
* VALLEYS..........83-93%.
* MID SLOPE........66-76%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHEAST WINDS 7 TO 12 MPH WITH GUSTS TO 20 MPH
IN THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH WITH GUSTS TO 30 MPH.
* CHC WETTING RAIN...25%.
* MIXING HEIGHT......1300-1800 FT AGL DECREASING TO 700-1200 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHEAST 10 TO 15 MPH.
* VENTILATION........GOOD DECREASING TO MARGINAL AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER........MOSTLY CLOUDY. CHANCE OF SHOWERS. SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* CHANCE OF THUNDER..20%.
* MAX TEMPERATURE....
* VALLEYS..........62-72.
* MID SLOPE........58-68.
* MIN HUMIDITY.......
* VALLEYS..........35-45%.
* MID SLOPE........43-53%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........SOUTH WINDS 10 TO 20 MPH WITH GUSTS TO 35 MPH.
* CHC WETTING RAIN...35%.
* MIXING HEIGHT......700-1200 FT AGL INCREASING TO 2000-3000 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO GOOD IN THE AFTERNOON.
EXTENDED
FRIDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING PARTLY
CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. LOWS 35-45.
DOWNSLOPE 2 TO 5 MPH.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. HIGHS 67-77.
LOWS 35-45. SLOPE WINDS.
SUNDAY
CLEAR. HIGHS 68-78. LOWS 37-47. SLOPE WINDS.
MONDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS. HIGHS 70-80. LOWS 38-48.
SLOPE WINDS.
TUESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS. HIGHS 67-77. LOWS
37-47.
WEDNESDAY
MOSTLY SUNNY. SLIGHT CHANCE OF SHOWERS. HIGHS 66-76.
.8 TO 14 DAY OUTLOOK FOR (THU SEP 25 THROUGH WED OCT 1)
NEAR NORMAL TEMPERATURES AND PRECIPITATION.
=
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