981
FNUS55 KREV 091220
FWFREV
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE RENO NV
520 AM PDT WED SEP 9 2026
DISCUSSION
AFTERNOON BREEZES INCREASE THURSDAY (GUSTS 20-25 MPH), CONTINUING
INTO THE WEEKEND, THEN PEAKING ON SATURDAY WITH WIDESPREAD GUSTS OF
35-40 MPH, LOCALLY UP TO 45 MPH IN WESTERN NEVADA AND NORTHEAST
CALIFORNIA. EXPECTED ELEVATED TO CRITICAL FIRE WEATHER CONDITIONS
THIS WEEKEND DUE TO STRONG WINDS, THOUGH MINIMUM HUMIDITIES WILL
REMAIN IN THE TEENS. SHOWER CHANCES INCREASE THURSDAY, WITH THE BEST
CHANCES ACROSS MONO, MINERAL AND SOUTHERN LYON COUNTIES.
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
NVZ420-100015-
NORTHERN SIERRA FRONT INCLUDING CARSON CITY, DOUGLAS, STOREY,
SOUTHERN WASHOE, WESTERN LYON, AND FAR SOUTHERN LASSEN COUNTIES-
520 AM PDT WED SEP 9 2026
TODAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........81-91.
* MID SLOPE........79-89.
* 24 HR TREND......6 DEGREES WARMER.
* MIN HUMIDITY.......
* VALLEYS..........8-18%.
* MID SLOPE........11-19%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........SOUTHEAST WINDS 10 TO 15 MPH UNTIL LATE
AFTERNOON BECOMING LIGHT.
* MIXING HEIGHT......1100-1600 FT AGL INCREASING TO 5400-6400 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........MARGINAL INCREASING TO VERY GOOD IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........54-64.
* MID SLOPE........57-66.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........38-48%.
* MID SLOPE........26-36%.
* 24 HR TREND......6% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS.
* MIXING HEIGHT......3900-4900 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........VERY GOOD DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........82-92.
* MID SLOPE........80-90.
* MIN HUMIDITY.......
* VALLEYS..........13-23%.
* MID SLOPE........18-28%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING WEST 10 TO 17 MPH
WITH GUSTS TO 30 MPH.
* RIDGE TOP........WEST WINDS 10 TO 20 MPH. GUSTS TO 30 MPH IN THE
AFTERNOON.
* MIXING HEIGHT......1500-2000 FT AGL INCREASING TO 6700-7700 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING WEST 15 TO 20 MPH IN THE
AFTERNOON.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN CLEARING. LOWS
52-62. WEST WINDS 12 TO 18 MPH SHIFTING TO THE SOUTHWEST 8 TO 13 MPH
IN THE LATE EVENING AND OVERNIGHT.
FRIDAY
CLEAR. HIGHS 80-90. LOWS 49-59. SOUTHWEST WINDS 10 TO
20 MPH.
SATURDAY
CLEAR. HIGHS 72-82. LOWS 42-52. SOUTHWEST WINDS 15 TO
25 MPH.
SUNDAY
CLEAR. HIGHS 63-73. LOWS 41-51. NORTH WINDS 10 TO 15 MPH.
MONDAY
CLEAR. HIGHS 66-76. LOWS 41-51.
TUESDAY
SUNNY. HIGHS 71-81.
NVZ421-100015-
SOUTHERN SIERRA FRONT INCLUDING ALPINE, NORTHERN MONO, SOUTHERN
LYON, AND WESTERN MINERAL COUNTIES-
520 AM PDT WED SEP 9 2026
TODAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........81-91.
* MID SLOPE........75-85.
* 24 HR TREND......6 DEGREES WARMER.
* MIN HUMIDITY.......
* VALLEYS..........11-21%.
* MID SLOPE........12-22%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING NORTH 8 TO 13 MPH IN
THE AFTERNOON.
* RIDGE TOP........LIGHT WINDS BECOMING SOUTH 10 TO 15 MPH IN THE
LATE MORNING AND EARLY AFTERNOON, THEN
BECOMING LIGHT LATE IN THE AFTERNOON.
* MIXING HEIGHT......1500-2000 FT AGL INCREASING TO 7300-8300 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING WEST 10 TO 15 MPH IN THE
AFTERNOON.
* VENTILATION........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........49-59.
* MID SLOPE........58-68.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........36-46%.
* MID SLOPE........25-35%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....NORTH WINDS 7 TO 12 MPH IN THE EVENING BECOMING
DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS.
* MIXING HEIGHT......3900-4900 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........VERY GOOD DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF SHOWERS IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...10%.
* MAX TEMPERATURE....
* VALLEYS..........81-91.
* MID SLOPE........75-85.
* MIN HUMIDITY.......
* VALLEYS..........17-27%.
* MID SLOPE........17-27%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING WEST 9 TO 14 MPH
WITH GUSTS TO 25 MPH IN THE LATE MORNING AND
AFTERNOON.
* RIDGE TOP........WEST WINDS 10 TO 20 MPH.
* MIXING HEIGHT......2200-3200 FT AGL INCREASING TO 8400-9400 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN CLEARING. SLIGHT
CHANCE OF SHOWERS IN THE EVENING. LOWS 46-56. SOUTHWEST WINDS 8 TO
13 MPH.
FRIDAY
CLEAR. HIGHS 79-89. LOWS 43-53. SOUTHWEST WINDS 10 TO
15 MPH.
SATURDAY
CLEAR. HIGHS 73-83. LOWS 36-46. SOUTHWEST WINDS 10 TO
20 MPH.
SUNDAY
CLEAR. HIGHS 64-74. LOWS 34-44. NORTH WINDS 10 TO 15 MPH.
MONDAY THROUGH TUESDAY
CLEAR. HIGHS 71-81. LOWS 34-44.
CAZ272-100015-
GREATER LAKE TAHOE AND TRUCKEE AREA-
520 AM PDT WED SEP 9 2026
TODAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........75-85.
* MID SLOPE........73-83.
* 24 HR TREND......6 DEGREES WARMER.
* MIN HUMIDITY.......
* VALLEYS..........17-27%.
* MID SLOPE........17-27%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........LIGHT WINDS BECOMING SOUTH 10 TO 15 MPH IN THE
LATE MORNING AND AFTERNOON.
* MIXING HEIGHT......1300-1800 FT AGL INCREASING TO 5800-6800 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING SOUTHWEST 10 TO 15 MPH IN
THE AFTERNOON.
* VENTILATION........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR THEN BECOMING PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........50-60.
* MID SLOPE........52-62.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........56-66%.
* MID SLOPE........37-47%.
* 24 HR TREND......14% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS.
* MIXING HEIGHT......3800-4800 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.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........72-82.
* MID SLOPE........70-80.
* MIN HUMIDITY.......
* VALLEYS..........26-36%.
* MID SLOPE........27-37%.
* 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........WEST WINDS 10 TO 15 MPH WITH GUSTS TO 25 MPH.
* MIXING HEIGHT......1700-2700 FT AGL INCREASING TO 6400-7400 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING WEST 15 TO 20 MPH IN THE
AFTERNOON.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING CLEAR.
LOWS 47-57. WEST WINDS 7 TO 12 MPH IN THE EVENING BECOMING DOWNSLOPE
2 TO 5 MPH.
FRIDAY
CLEAR. HIGHS 67-77. LOWS 45-55. SOUTHWEST WINDS 10 TO
15 MPH.
SATURDAY
CLEAR. HIGHS 60-68. LOWS 36-46. SOUTHWEST WINDS 10 TO
20 MPH.
SUNDAY
CLEAR. HIGHS 58-66. LOWS 36-46. EAST WINDS 10 TO 15 MPH.
MONDAY THROUGH TUESDAY
CLEAR. HIGHS 62-72. LOWS 37-47.
NVZ423-100015-
WEST HUMBOLDT BASIN IN PERSHING COUNTY-
520 AM PDT WED SEP 9 2026
TODAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........86-92.
* MID SLOPE........81-91.
* 24 HR TREND......7 DEGREES WARMER.
* MIN HUMIDITY.......
* VALLEYS..........9-15%.
* MID SLOPE........11-16%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........NORTHWEST WINDS 10 TO 15 MPH.
* MIXING HEIGHT......1000-1500 FT AGL INCREASING TO 5200-6200 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........MARGINAL INCREASING TO VERY GOOD IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........53-63.
* MID SLOPE........56-65.
* 24 HR TREND......4 DEGREES WARMER.
* MAX HUMIDITY.......
* VALLEYS..........25-35%.
* MID SLOPE........20-30%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........WEST WINDS 10 TO 15 MPH.
* MIXING HEIGHT......3800-4800 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........VERY GOOD DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........88-94.
* MID SLOPE........82-92.
* MIN HUMIDITY.......
* VALLEYS..........12-18%.
* MID SLOPE........14-19%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTHWEST 9 TO 15
MPH WITH GUSTS TO 25 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH.
* MIXING HEIGHT......1500-2000 FT AGL INCREASING TO 8400-9400 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING WEST 15 TO 20 MPH IN THE
AFTERNOON.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING PARTLY
CLOUDY. LOWS 54-64. WEST WINDS 9 TO 16 MPH UNTIL EARLY MORNING
BECOMING DOWNSLOPE 2 TO 5 MPH.
FRIDAY
CLEAR. HIGHS 85-93. LOWS 51-61. SOUTHWEST WINDS 10 TO
20 MPH.
SATURDAY
CLEAR. HIGHS 77-87. LOWS 40-50. SOUTHWEST WINDS 15 TO
25 MPH.
SUNDAY
CLEAR. HIGHS 66-74. LOWS 38-48. SLOPE WINDS.
MONDAY
CLEAR. HIGHS 69-77. LOWS 38-48.
TUESDAY
SUNNY. HIGHS 75-83.
NVZ429-100015-
LAHONTAN BASIN INCLUDING CHURCHILL AND EASTERN MINERAL COUNTIES-
520 AM PDT WED SEP 9 2026
TODAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........84-94.
* MID SLOPE........81-91.
* 24 HR TREND......6 DEGREES WARMER.
* MIN HUMIDITY.......
* VALLEYS..........9-16%.
* MID SLOPE........9-15%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........WEST WINDS 10 TO 15 MPH.
* MIXING HEIGHT......1100-1600 FT AGL INCREASING TO 5700-6700 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........MARGINAL INCREASING TO VERY GOOD IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING CLEAR.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........53-63.
* MID SLOPE........57-67.
* 24 HR TREND......4 DEGREES WARMER.
* MAX HUMIDITY.......
* VALLEYS..........28-38%.
* MID SLOPE........20-30%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........NORTHWEST WINDS 10 TO 15 MPH.
* MIXING HEIGHT......3500-4500 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........VERY GOOD DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
AFTERNOON.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........85-95.
* MID SLOPE........82-92.
* MIN HUMIDITY.......
* VALLEYS..........12-22%.
* MID SLOPE........12-21%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING WEST 9 TO 14 MPH IN
THE AFTERNOON.
* RIDGE TOP........WEST WINDS 10 TO 15 MPH. GUSTS TO 25 MPH IN THE
AFTERNOON.
* MIXING HEIGHT......1500-2000 FT AGL INCREASING TO 8200-9200 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING WEST 10 TO 15 MPH IN THE
AFTERNOON.
* VENTILATION........FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN BECOMING PARTLY
CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE EVENING. LOWS 53-63. WEST
WINDS 9 TO 14 MPH UNTIL EARLY MORNING BECOMING DOWNSLOPE 2 TO 5 MPH.
FRIDAY
CLEAR. HIGHS 85-95. LOWS 49-59. SOUTHWEST WINDS 10 TO
20 MPH.
SATURDAY
CLEAR. HIGHS 80-90. LOWS 40-50. WEST WINDS 15 TO 25 MPH.
SUNDAY
CLEAR. HIGHS 67-77. LOWS 38-48. NORTH WINDS 10 TO 15 MPH.
MONDAY
CLEAR. HIGHS 70-80. LOWS 38-48.
TUESDAY
SUNNY. HIGHS 75-85.
CAZ270-278-NVZ458-100015-
SURPRISE VALLEY CALIFORNIA-EASTERN LASSEN COUNTY-
NORTHERN WASHOE COUNTY-
520 AM PDT WED SEP 9 2026
TODAY
* SKY/WEATHER........SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........81-91.
* MID SLOPE........78-86.
* 24 HR TREND......8 DEGREES WARMER.
* MIN HUMIDITY.......
* VALLEYS..........10-20%.
* MID SLOPE........12-18%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING SOUTH 7 TO 12 MPH
WITH GUSTS TO 20 MPH IN THE AFTERNOON.
* RIDGE TOP........LIGHT WINDS.
* MIXING HEIGHT......900-1400 FT AGL INCREASING TO 5500-6500 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........MARGINAL INCREASING TO VERY GOOD IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........46-56.
* MID SLOPE........52-62.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........34-44%.
* MID SLOPE........27-37%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS.
* MIXING HEIGHT......3800-4800 FT AGL IN THE EVENING THEN 200-500
FT AGL.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........82-92.
* MID SLOPE........78-88.
* MIN HUMIDITY.......
* VALLEYS..........14-23%.
* MID SLOPE........15-21%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING WEST 13 TO 20 MPH
WITH GUSTS TO 30 MPH.
* RIDGE TOP........WEST WINDS 10 TO 20 MPH WITH GUSTS TO 30 MPH.
* MIXING HEIGHT......1400-1900 FT AGL INCREASING TO 7800-8800 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING WEST 15 TO 25 MPH IN THE
AFTERNOON.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN CLEARING. LOWS
44-54. WEST WINDS 13 TO 20 MPH BECOMING DOWNSLOPE 2 TO 5 MPH.
FRIDAY
CLEAR. HIGHS 79-89. LOWS 41-51. WEST WINDS 10 TO 20 MPH.
SATURDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS. HIGHS 67-77. LOWS
30-40. WEST WINDS 15 TO 25 MPH.
SUNDAY
CLEAR. HIGHS 60-70. LOWS 30-40. SLOPE WINDS.
MONDAY
CLEAR. HIGHS 63-73. LOWS 32-42.
TUESDAY
SUNNY. HIGHS 68-78.
CAZ271-100015-
WESTERN LASSEN, EASTERN PLUMAS, AND EASTERN SIERRA COUNTIES-
520 AM PDT WED SEP 9 2026
TODAY
* SKY/WEATHER........SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........81-91.
* MID SLOPE........79-87.
* 24 HR TREND......7 DEGREES WARMER.
* MIN HUMIDITY.......
* VALLEYS..........15-23%.
* MID SLOPE........16-24%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........SOUTH WINDS 10 TO 15 MPH.
* MIXING HEIGHT......1000-1500 FT AGL INCREASING TO 6700-7700 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........CLEAR.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........43-53.
* MID SLOPE........52-62.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........49-59%.
* MID SLOPE........36-46%.
* 24 HR TREND......12% DRIER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS BECOMING WEST 10 TO 15 MPH AFTER
MIDNIGHT.
* MIXING HEIGHT......3800-4800 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.
THURSDAY
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING SUNNY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........79-89.
* MID SLOPE........76-86.
* MIN HUMIDITY.......
* VALLEYS..........17-27%.
* MID SLOPE........18-28%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING WEST 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......1700-2200 FT AGL INCREASING TO 7400-8400 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS BECOMING WEST 15 TO 25 MPH IN THE
AFTERNOON.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN BECOMING CLEAR.
LOWS 41-51. WEST WINDS 9 TO 14 MPH IN THE EVENING BECOMING DOWNSLOPE
2 TO 5 MPH.
FRIDAY
CLEAR. HIGHS 74-84. LOWS 38-48. SOUTHWEST WINDS 10 TO
15 MPH.
SATURDAY
CLEAR. HIGHS 62-72. LOWS 29-39. SOUTHWEST WINDS 10 TO
20 MPH.
SUNDAY
CLEAR. HIGHS 58-68. LOWS 29-39. NORTHEAST WINDS 10 TO
15 MPH.
MONDAY THROUGH TUESDAY
CLEAR. HIGHS 65-75. LOWS 31-41.
CAZ274-100015-
SOUTHERN MONO COUNTY-
520 AM PDT WED SEP 9 2026
TODAY
* SKY/WEATHER........PARTLY CLOUDY.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MAX TEMPERATURE....
* VALLEYS..........77-87.
* MID SLOPE........74-84.
* 24 HR TREND......4 DEGREES WARMER.
* MIN HUMIDITY.......
* VALLEYS..........13-23%.
* MID SLOPE........15-25%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH.
* RIDGE TOP........LIGHT WINDS. GUSTS TO 20 MPH IN THE MORNING.
* MIXING HEIGHT......1700-2200 FT AGL INCREASING TO 7400-8400 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........PARTLY CLOUDY THEN BECOMING CLEAR.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...0%.
* MIN TEMPERATURE....
* VALLEYS..........49-59.
* MID SLOPE........49-59.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........44-54%.
* MID SLOPE........29-39%.
* 24 HR TREND......13% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....DOWNSLOPE 2 TO 5 MPH.
* RIDGE TOP........LIGHT WINDS.
* MIXING HEIGHT......4100-5100 FT AGL DECREASING TO 600 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....LIGHT WINDS.
* VENTILATION........VERY GOOD DECREASING TO POOR AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER........SUNNY THEN BECOMING MOSTLY CLOUDY. CHANCE OF
SHOWERS IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* CHC WETTING RAIN...5%.
* MAX TEMPERATURE....
* VALLEYS..........76-86.
* MID SLOPE........73-83.
* MIN HUMIDITY.......
* VALLEYS..........18-28%.
* MID SLOPE........21-31%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....UPSLOPE 4 TO 8 MPH BECOMING WEST 7 TO 12 MPH
WITH GUSTS TO 25 MPH IN THE AFTERNOON.
* RIDGE TOP........WEST WINDS 10 TO 15 MPH. GUSTS TO 30 MPH IN THE
AFTERNOON.
* MIXING HEIGHT......2200-3200 FT AGL INCREASING TO 7800-8800 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING THEN CLEARING. SLIGHT
CHANCE OF SHOWERS IN THE EVENING. LOWS 47-57. WEST WINDS 5 TO 10 MPH
IN THE EVENING BECOMING DOWNSLOPE 2 TO 5 MPH, THEN BECOMING
SOUTHWEST 7 TO 12 MPH AFTER MIDNIGHT.
FRIDAY
CLEAR. HIGHS 74-84. LOWS 43-53. SOUTHWEST WINDS 10 TO
15 MPH.
SATURDAY
CLEAR. HIGHS 70-80. LOWS 38-48. SOUTHWEST WINDS 15 TO
25 MPH.
SUNDAY
CLEAR. HIGHS 66-76. LOWS 36-46. NORTHWEST WINDS 10 TO
15 MPH.
MONDAY THROUGH TUESDAY
CLEAR. HIGHS 69-79. LOWS 36-46.
.8 TO 14 DAY OUTLOOK FOR (WED SEP 16 THROUGH TUE SEP 22)
ABOVE NORMAL TEMPERATURES AND PRECIPITATION.
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