329
FNUS55 KREV 201018
FWFREV
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE RENO NV
218 AM PST SAT DEC 20 2025
DISCUSSION
RAIN ALONG WITH SNOW SHOWERS ABOVE 9,000 FEET IS LIKELY IN THE SIERRA
TODAY ALONG WITH HIGHER HUMIDITIES. HEAVY RAIN ALONG WITH LOCALIZED
FLOODING IS EXPECTED TONIGHT THROUGH SUNDAY, ALONG WITH ANOTHER ROUND
OF STRONG WINDS ON SUNDAY INTO EARLY MONDAY. WESTERN NV WILL BE MOSTLY
DRY FOR TODAY, WITH INCREASING CHANCES FOR PRECIPITATION TONIGHT.
ADDITIONAL STORMS ARE POSSIBLE LATE TUESDAY THROUGH CHRISTMAS DAY BUT
CONFIDENCE IS MIXED IN HOW MUCH RAIN AND SNOW WILL ACCUMULATE.
NOTE: THUNDERSTORMS IMPLY GUSTY AND ERRATIC WINDS.
NOTE: MIXING HEIGHTS ARE IN FEET ABOVE GROUND LEVEL OF THE VALLEY FLOORS.
NOTE: PLEASE SEE OPERATING PLAN FOR DETAILED ZONE DESCRIPTIONS
HTTPS://WWW.WEATHER.GOV/WRH/FIRE?WFO=REV
NVZ420-210030-
NORTHERN SIERRA FRONT INCLUDING CARSON CITY, DOUGLAS, STOREY,
SOUTHERN WASHOE, WESTERN LYON, AND FAR SOUTHERN LASSEN COUNTIES-
218 AM PST SAT DEC 20 2025
TODAY
* SKY/WEATHER........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........53-63.
* MID SLOPE........48-58.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........43-53%.
* MID SLOPE........47-57%.
* 24 HR TREND......23% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 14 MPH WITH GUSTS TO 25
MPH.
* RIDGE TOP........SOUTHWEST WINDS 15 TO 25 MPH. GUSTS TO 55 MPH
DECREASING TO 40 MPH LATE IN THE AFTERNOON.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......1100-1600 FT AGL INCREASING TO 2400-3400 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 10 TO 20 MPH INCREASING TO SOUTHWEST 20
TO 30 MPH IN THE AFTERNOON.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........MOSTLY CLOUDY. CHANCE OF RAIN.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........36-46.
* MID SLOPE........39-46.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........77-87%.
* MID SLOPE........68-78%.
* 24 HR TREND......11% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 9 TO 15 MPH WITH GUSTS TO 25 MPH.
* RIDGE TOP........SOUTH WINDS 10 TO 20 MPH WITH GUSTS TO 45 MPH
INCREASING TO SOUTHWEST 20 TO 35 MPH WITH
GUSTS TO 70 MPH AFTER MIDNIGHT.
* CHC WETTING RAIN...45%.
* MIXING HEIGHT......1000-1500 FT AGL DECREASING TO 600-1000 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH INCREASING TO 15 TO 25
MPH AFTER MIDNIGHT.
* VENTILATION........GOOD.
SUNDAY
* SKY/WEATHER........RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........52-62.
* MID SLOPE........47-57.
* MIN HUMIDITY.......
* VALLEYS..........48-58%.
* MID SLOPE........51-61%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 12 TO 20 MPH WITH GUSTS TO 35 MPH
INCREASING TO SOUTHWEST 20 TO 30 MPH WITH
GUSTS TO 45 MPH.
* RIDGE TOP........SOUTHWEST WINDS 30 TO 45 MPH WITH GUSTS TO 75
MPH.
* CHC WETTING RAIN...60%.
* MIXING HEIGHT......1200-1700 FT AGL INCREASING TO 2800-3800 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 25 TO 35 MPH INCREASING TO 35 TO 55
MPH IN THE AFTERNOON.
* VENTILATION........EXCELLENT.
EXTENDED
SUNDAY NIGHT
RAIN. LOWS 34-44. SOUTHWEST WINDS 19 TO 30 MPH.
MONDAY
RAIN. HIGHS 48-56. LOWS 30-40. SOUTHWEST WINDS 10 TO
15 MPH.
TUESDAY
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW. HIGHS 49-59. LOWS
30-40. SOUTH WINDS 10 TO 15 MPH.
WEDNESDAY
RAIN AND SNOW LIKELY. HIGHS 44-50. LOWS 26-36. SOUTH
WINDS 10 TO 15 MPH.
CHRISTMAS DAY
SNOW AND RAIN LIKELY. HIGHS 41-49. LOWS 20-30.
FRIDAY
SNOW LIKELY AND A CHANCE OF RAIN. HIGHS 38-45.
NVZ421-210030-
SOUTHERN SIERRA FRONT INCLUDING ALPINE, NORTHERN MONO, SOUTHERN
LYON, AND WESTERN MINERAL COUNTIES-
218 AM PST SAT DEC 20 2025
TODAY
* SKY/WEATHER........SNOW LIKELY IN THE MORNING. CHANCE OF RAIN.
CHANCE OF SNOW IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........51-61.
* MID SLOPE........45-55.
* 24 HR TREND......6 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........40-50%.
* MID SLOPE........40-50%.
* 24 HR TREND......38% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 14 MPH WITH GUSTS TO 30
MPH.
* RIDGE TOP........SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 70
MPH SHIFTING TO THE WEST 20 TO 35 MPH WITH
GUSTS TO 55 MPH IN THE AFTERNOON.
* CHC WETTING RAIN...25%.
* MIXING HEIGHT......1000-1500 FT AGL INCREASING TO 1900-2900 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 15 TO 25 MPH.
* VENTILATION........GOOD INCREASING TO VERY GOOD IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........SNOW LIKELY IN THE EVENING. CHANCE OF RAIN.
SNOW AFTER MIDNIGHT.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........30-40.
* MID SLOPE........37-47.
* 24 HR TREND......4 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........74-84%.
* MID SLOPE........58-68%.
* 24 HR TREND......6% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 9 TO 14 MPH. GUSTS TO 30 MPH
INCREASING TO 35 MPH AFTER MIDNIGHT.
* RIDGE TOP........SOUTH WINDS 20 TO 35 MPH WITH GUSTS TO 60 MPH
BECOMING SOUTHWEST AND INCREASING TO 40 TO 60
MPH WITH GUSTS TO 85 MPH AFTER MIDNIGHT.
* CHC WETTING RAIN...55%.
* MIXING HEIGHT......700-1200 FT AGL.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH INCREASING TO 20 TO 30
MPH AFTER MIDNIGHT.
* VENTILATION........GOOD.
SUNDAY
* SKY/WEATHER........CHANCE OF RAIN IN THE MORNING. SNOW. RAIN IN
THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........50-60.
* MID SLOPE........44-54.
* MIN HUMIDITY.......
* VALLEYS..........39-49%.
* MID SLOPE........39-49%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 9 TO 16 MPH WITH GUSTS TO 35 MPH
INCREASING TO SOUTHWEST 20 TO 30 MPH WITH
GUSTS TO 50 MPH.
* RIDGE TOP........SOUTHWEST WINDS 40 TO 60 MPH WITH GUSTS TO 95
MPH.
* CHC WETTING RAIN...55%.
* MIXING HEIGHT......1400-1900 FT AGL INCREASING TO 3600-4600 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 30 TO 40 MPH INCREASING TO 40 TO 60
MPH IN THE AFTERNOON.
* VENTILATION........EXCELLENT.
EXTENDED
SUNDAY NIGHT
RAIN AND SNOW LIKELY. LOWS 30-40. SOUTHWEST WINDS
20 TO 30 MPH DECREASING TO 15 TO 25 MPH AFTER MIDNIGHT.
MONDAY
RAIN LIKELY AND A CHANCE OF SNOW. HIGHS 46-56. LOWS 27-37.
SOUTHWEST WINDS 10 TO 20 MPH.
TUESDAY
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW. HIGHS 48-58. LOWS
24-34. SOUTH WINDS 10 TO 20 MPH.
WEDNESDAY
SNOW AND RAIN. HIGHS 39-49. LOWS 22-32. SOUTH WINDS
10 TO 15 MPH.
CHRISTMAS DAY
SNOW AND RAIN. HIGHS 38-48. LOWS 16-26.
FRIDAY
SNOW LIKELY. HIGHS 35-45.
CAZ272-210030-
GREATER LAKE TAHOE AND TRUCKEE AREA-
218 AM PST SAT DEC 20 2025
TODAY
* SKY/WEATHER........MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........43-49.
* MID SLOPE........39-47.
* 24 HR TREND......4 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........76-86%.
* MID SLOPE........71-81%.
* 24 HR TREND......55% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 12 TO 18 MPH WITH GUSTS TO 35
MPH DECREASING TO 9 TO 16 MPH WITH GUSTS TO 30
MPH IN THE LATE MORNING AND AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 20 TO 35 MPH. GUSTS TO 70 MPH
DECREASING TO 50 MPH LATE IN THE AFTERNOON.
* CHC WETTING RAIN...35%.
* MIXING HEIGHT......1500-2000 FT AGL.
* TRANSPORT WINDS....SOUTHWEST 20 TO 30 MPH.
* VENTILATION........EXCELLENT.
TONIGHT
* SKY/WEATHER........RAIN AND SNOW LIKELY IN THE EVENING, THEN RAIN
AND SNOW AFTER MIDNIGHT.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........31-41.
* MID SLOPE........31-40.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........95-100%.
* MID SLOPE........89-99%.
* 24 HR TREND......4% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 16 MPH WITH GUSTS TO 35 MPH
INCREASING TO 15 TO 25 MPH WITH GUSTS TO 40
MPH.
* RIDGE TOP........SOUTHWEST WINDS 30 TO 50 MPH WITH GUSTS TO 90
MPH.
* CHC WETTING RAIN...75%.
* MIXING HEIGHT......1200-1700 FT AGL.
* TRANSPORT WINDS....SOUTHWEST 15 TO 25 MPH INCREASING TO 30 TO 40
MPH AFTER MIDNIGHT.
* VENTILATION........GOOD INCREASING TO EXCELLENT AFTER MIDNIGHT.
SUNDAY
* SKY/WEATHER........RAIN AND SNOW.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........41-47.
* MID SLOPE........37-45.
* MIN HUMIDITY.......
* VALLEYS..........82-92%.
* MID SLOPE........70-80%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 40
MPH.
* RIDGE TOP........SOUTHWEST WINDS 30 TO 45 MPH WITH GUSTS TO 95
MPH.
* CHC WETTING RAIN...90%.
* MIXING HEIGHT......1600-2100 FT AGL INCREASING TO 2500-3500 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 30 TO 50 MPH.
* VENTILATION........EXCELLENT.
EXTENDED
SUNDAY NIGHT
RAIN AND SNOW. LOWS 28-38. SOUTHWEST WINDS 15 TO
25 MPH.
MONDAY
RAIN AND SNOW. HIGHS 38-43. LOWS 27-37. SOUTHWEST WINDS
10 TO 15 MPH.
TUESDAY
SNOW AND RAIN. HIGHS 40-46. LOWS 24-34. SOUTH WINDS 10 TO
15 MPH.
WEDNESDAY
SNOW AND RAIN. HIGHS 35-40. LOWS 22-32. SOUTH WINDS
10 TO 15 MPH.
CHRISTMAS DAY
SNOW. HIGHS 33-39. LOWS 19-29.
FRIDAY
SNOW LIKELY. HIGHS 31-37.
NVZ423-210030-
WEST HUMBOLDT BASIN IN PERSHING COUNTY-
218 AM PST SAT DEC 20 2025
TODAY
* SKY/WEATHER........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........56-62.
* MID SLOPE........50-60.
* 24 HR TREND......LITTLE CHANGE.
* MIN HUMIDITY.......
* VALLEYS..........39-49%.
* MID SLOPE........44-54%.
* 24 HR TREND......21% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 14 MPH. GUSTS TO 20 MPH IN
THE MORNING.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO 45
MPH.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......600-900 FT AGL INCREASING TO 1900-2900 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 10 TO 15 MPH SHIFTING TO THE SOUTHWEST 15
TO 25 MPH IN THE AFTERNOON.
* VENTILATION........MARGINAL INCREASING TO VERY GOOD IN THE
AFTERNOON.
TONIGHT
* SKY/WEATHER........CHANCE OF RAIN IN THE EVENING, THEN RAIN
LIKELY AFTER MIDNIGHT.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........37-46.
* MID SLOPE........39-46.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........75-85%.
* MID SLOPE........63-73%.
* 24 HR TREND......15% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 8 TO 13 MPH. GUSTS TO 20 MPH AFTER
MIDNIGHT.
* RIDGE TOP........SOUTH WINDS 10 TO 20 MPH INCREASING TO SOUTHWEST
20 TO 30 MPH IN THE MORNING. GUSTS TO 45 MPH
INCREASING TO 65 MPH IN THE MORNING.
* CHC WETTING RAIN...40%.
* MIXING HEIGHT......1000-1500 FT AGL DECREASING TO 600-800 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........GOOD DECREASING TO MARGINAL AFTER MIDNIGHT.
SUNDAY
* SKY/WEATHER........CHANCE OF RAIN IN THE MORNING, THEN RAIN
LIKELY IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........55-63.
* MID SLOPE........51-61.
* MIN HUMIDITY.......
* VALLEYS..........41-51%.
* MID SLOPE........47-57%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 9 TO 16 MPH INCREASING TO SOUTHWEST
15 TO 25 MPH. GUSTS TO 35 MPH.
* RIDGE TOP........SOUTHWEST WINDS 25 TO 35 MPH WITH GUSTS TO 75
MPH.
* CHC WETTING RAIN...25%.
* MIXING HEIGHT......600-1100 FT AGL INCREASING TO 2500-3500 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 25 TO 35 MPH.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
SUNDAY NIGHT
RAIN LIKELY. LOWS 36-46. SOUTHWEST WINDS 13 TO
20 MPH DECREASING TO 10 TO 17 MPH IN THE MORNING.
MONDAY
RAIN LIKELY. HIGHS 51-57. LOWS 34-44. SOUTH WINDS 10 TO
15 MPH.
TUESDAY
MOSTLY CLOUDY. CHANCE OF RAIN. HIGHS 53-61. LOWS 34-43.
SOUTHEAST WINDS 10 TO 15 MPH.
WEDNESDAY
RAIN LIKELY AND A CHANCE OF SNOW. HIGHS 49-55. LOWS
28-38. SOUTH WINDS 10 TO 15 MPH.
CHRISTMAS DAY
CLOUDY. CHANCE OF RAIN AND SNOW. HIGHS 46-54. LOWS
25-35.
FRIDAY
MOSTLY CLOUDY. CHANCE OF SNOW AND RAIN. HIGHS 40-45.
NVZ429-210030-
LAHONTAN BASIN INCLUDING CHURCHILL AND EASTERN MINERAL COUNTIES-
218 AM PST SAT DEC 20 2025
TODAY
* SKY/WEATHER........CLOUDY. SLIGHT CHANCE OF RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........55-65.
* MID SLOPE........51-61.
* 24 HR TREND......6 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........39-49%.
* MID SLOPE........41-51%.
* 24 HR TREND......34% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 7 TO 12 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH. GUSTS TO 50 MPH
DECREASING TO 35 MPH IN THE AFTERNOON.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......600-1000 FT AGL INCREASING TO 1800-2800 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........MOSTLY CLOUDY. CHANCE OF RAIN.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........35-45.
* MID SLOPE........39-49.
* 24 HR TREND......5 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........71-81%.
* MID SLOPE........57-67%.
* 24 HR TREND......10% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 9 TO 14 MPH.
* RIDGE TOP........SOUTH WINDS 10 TO 20 MPH INCREASING TO SOUTHWEST
20 TO 30 MPH IN THE MORNING. GUSTS TO 45 MPH
INCREASING TO 65 MPH IN THE MORNING.
* CHC WETTING RAIN...10%.
* MIXING HEIGHT......600-1100 FT AGL.
* TRANSPORT WINDS....SOUTH 10 TO 15 MPH.
* VENTILATION........FAIR.
SUNDAY
* SKY/WEATHER........MOSTLY CLOUDY. CHANCE OF RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........57-67.
* MID SLOPE........53-63.
* MIN HUMIDITY.......
* VALLEYS..........36-46%.
* MID SLOPE........38-48%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 9 TO 16 MPH WITH GUSTS TO 30 MPH
INCREASING TO SOUTHWEST 15 TO 25 MPH WITH
GUSTS TO 40 MPH.
* RIDGE TOP........SOUTHWEST WINDS 20 TO 35 MPH WITH GUSTS TO 80
MPH.
* CHC WETTING RAIN...10%.
* MIXING HEIGHT......600-1000 FT AGL INCREASING TO 3400-4400 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTH 15 TO 25 MPH INCREASING TO SOUTHWEST 25
TO 35 MPH IN THE AFTERNOON.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
EXTENDED
SUNDAY NIGHT
MOSTLY CLOUDY. CHANCE OF RAIN. LOWS 35-45. SOUTHWEST
WINDS 15 TO 25 MPH SHIFTING TO THE SOUTH 10 TO 17 MPH IN THE
MORNING.
MONDAY
CLOUDY. CHANCE OF RAIN. HIGHS 52-60. LOWS 31-41. SOUTH
WINDS 10 TO 15 MPH.
TUESDAY
MOSTLY CLOUDY. CHANCE OF RAIN. HIGHS 53-63. LOWS 31-41.
SOUTHEAST WINDS 10 TO 20 MPH.
WEDNESDAY
RAIN AND SNOW LIKELY. HIGHS 45-55. LOWS 29-39. SOUTH
WINDS 10 TO 20 MPH.
CHRISTMAS DAY
RAIN AND SNOW LIKELY. HIGHS 45-55. LOWS 24-34.
FRIDAY
MOSTLY CLOUDY. CHANCE OF SNOW AND RAIN. HIGHS 40-49.
CAZ270-278-NVZ458-210030-
SURPRISE VALLEY CALIFORNIA-EASTERN LASSEN COUNTY-
NORTHERN WASHOE COUNTY-
218 AM PST SAT DEC 20 2025
TODAY
* SKY/WEATHER........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
SLIGHT CHANCE OF RAIN IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........49-59.
* MID SLOPE........44-54.
* 24 HR TREND......6 DEGREES WARMER.
* MIN HUMIDITY.......
* VALLEYS..........50-60%.
* MID SLOPE........50-60%.
* 24 HR TREND......LITTLE CHANGE.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 15 MPH WITH GUSTS TO 25
MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO 45
MPH.
* CHC WETTING RAIN...5%.
* MIXING HEIGHT......1000-1500 FT AGL INCREASING TO 2900-3900 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 15 TO 20 MPH SHIFTING TO THE SOUTHWEST 20
TO 30 MPH IN THE AFTERNOON.
* VENTILATION........GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........CHANCE OF RAIN AND SNOW.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........32-42.
* MID SLOPE........33-43.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........87-97%.
* MID SLOPE........88-98%.
* 24 HR TREND......6% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 9 TO 14 MPH WITH GUSTS TO 25 MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO 40
MPH INCREASING TO 20 TO 35 MPH WITH GUSTS TO
60 MPH IN THE MORNING.
* CHC WETTING RAIN...55%.
* MIXING HEIGHT......1600-2600 FT AGL DECREASING TO 600-1000 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS....SOUTHWEST 15 TO 25 MPH.
* VENTILATION........VERY GOOD DECREASING TO FAIR AFTER MIDNIGHT.
SUNDAY
* SKY/WEATHER........RAIN AND SNOW.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........46-56.
* MID SLOPE........43-51.
* MIN HUMIDITY.......
* VALLEYS..........67-77%.
* MID SLOPE........73-83%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTH WINDS 10 TO 18 MPH WITH GUSTS TO 35 MPH
INCREASING TO SOUTHWEST 15 TO 25 MPH WITH
GUSTS TO 40 MPH IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 20 TO 35 MPH WITH GUSTS TO 65
MPH.
* CHC WETTING RAIN...80%.
* MIXING HEIGHT......1200-1700 FT AGL INCREASING TO 2900-3900 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 20 TO 30 MPH INCREASING TO 30 TO 40
MPH IN THE AFTERNOON.
* VENTILATION........VERY GOOD INCREASING TO EXCELLENT IN THE
AFTERNOON.
EXTENDED
SUNDAY NIGHT
RAIN AND SNOW. LOWS 29-39. SOUTHWEST WINDS 15 TO
25 MPH.
MONDAY
RAIN AND SNOW LIKELY. HIGHS 43-53. LOWS 28-38. SOUTHWEST
WINDS 10 TO 15 MPH.
TUESDAY THROUGH WEDNESDAY
RAIN AND SNOW LIKELY. HIGHS 42-52. LOWS
25-35. SOUTH WINDS 10 TO 20 MPH.
CHRISTMAS DAY
SNOW AND RAIN LIKELY. HIGHS 37-47. LOWS 20-30.
FRIDAY
MOSTLY CLOUDY. CHANCE OF SNOW AND RAIN. HIGHS 36-44.
CAZ271-210030-
WESTERN LASSEN, EASTERN PLUMAS, AND EASTERN SIERRA COUNTIES-
218 AM PST SAT DEC 20 2025
TODAY
* SKY/WEATHER........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN AND SNOW.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........44-54.
* MID SLOPE........41-51.
* 24 HR TREND......6 DEGREES WARMER.
* MIN HUMIDITY.......
* VALLEYS..........59-69%.
* MID SLOPE........61-71%.
* 24 HR TREND......9% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 14 MPH WITH GUSTS TO 25
MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH. GUSTS TO 60 MPH
DECREASING TO 45 MPH IN THE AFTERNOON.
* CHC WETTING RAIN...10%.
* MIXING HEIGHT......1100-1600 FT AGL INCREASING TO 2100-3100 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 20 TO 30 MPH.
* VENTILATION........GOOD INCREASING TO VERY GOOD IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........RAIN LIKELY AND A CHANCE OF SNOW IN THE
EVENING, THEN RAIN AFTER MIDNIGHT.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........29-39.
* MID SLOPE........32-42.
* 24 HR TREND......LITTLE CHANGE.
* MAX HUMIDITY.......
* VALLEYS..........92-100%.
* MID SLOPE........93-100%.
* 24 HR TREND......5% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 14 MPH WITH GUSTS TO 25
MPH.
* RIDGE TOP........SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO 40
MPH INCREASING TO 20 TO 35 MPH WITH GUSTS TO
70 MPH AFTER MIDNIGHT.
* CHC WETTING RAIN...70%.
* MIXING HEIGHT......900-1400 FT AGL.
* TRANSPORT WINDS....SOUTHWEST 15 TO 25 MPH.
* VENTILATION........GOOD.
SUNDAY
* SKY/WEATHER........RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........43-51.
* MID SLOPE........41-49.
* MIN HUMIDITY.......
* VALLEYS..........76-86%.
* MID SLOPE........75-85%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 17 MPH WITH GUSTS TO 35 MPH
INCREASING TO 13 TO 20 MPH WITH GUSTS TO 40
MPH LATE IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 25 TO 40 MPH WITH GUSTS TO 75
MPH.
* CHC WETTING RAIN...95%.
* MIXING HEIGHT......1700-2200 FT AGL INCREASING TO 2900-3900 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 25 TO 35 MPH.
* VENTILATION........EXCELLENT.
EXTENDED
SUNDAY NIGHT
RAIN. SNOW AFTER MIDNIGHT. LOWS 26-36. SOUTHWEST
WINDS 12 TO 18 MPH INCREASING TO 15 TO 25 MPH IN THE LATE EVENING
AND EARLY MORNING, THEN DECREASING TO 9 TO 16 MPH IN THE MORNING.
MONDAY
RAIN AND SNOW. HIGHS 41-49. LOWS 25-35. SOUTHWEST WINDS
10 TO 15 MPH.
TUESDAY
RAIN AND SNOW. HIGHS 40-50. LOWS 24-34. SOUTH WINDS 10 TO
15 MPH.
WEDNESDAY
SNOW AND RAIN. HIGHS 37-45. LOWS 22-32. SOUTH WINDS
10 TO 15 MPH.
CHRISTMAS DAY
SNOW AND RAIN. HIGHS 36-44. LOWS 19-29.
FRIDAY
SNOW LIKELY. HIGHS 36-42.
CAZ274-210030-
SOUTHERN MONO COUNTY-
218 AM PST SAT DEC 20 2025
TODAY
* SKY/WEATHER........MOSTLY CLOUDY. CHANCE OF SNOW AND A SLIGHT
CHANCE OF RAIN.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........49-59.
* MID SLOPE........46-56.
* 24 HR TREND......5 DEGREES COOLER.
* MIN HUMIDITY.......
* VALLEYS..........37-47%.
* MID SLOPE........43-53%.
* 24 HR TREND......40% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....WEST WINDS 9 TO 14 MPH. GUSTS TO 20 MPH IN THE
MORNING.
* RIDGE TOP........WEST WINDS 15 TO 25 MPH WITH GUSTS TO 60 MPH.
* CHC WETTING RAIN...20%.
* MIXING HEIGHT......800-1300 FT AGL INCREASING TO 1400-1900 FT AGL
IN THE AFTERNOON.
* TRANSPORT WINDS....WEST 10 TO 15 MPH.
* VENTILATION........FAIR INCREASING TO GOOD IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER........SNOW LIKELY IN THE EVENING. CHANCE OF RAIN.
SNOW AFTER MIDNIGHT.
* CHANCE OF THUNDER..0%.
* MIN TEMPERATURE....
* VALLEYS..........30-40.
* MID SLOPE........30-40.
* 24 HR TREND......6 DEGREES COOLER.
* MAX HUMIDITY.......
* VALLEYS..........80-90%.
* MID SLOPE........66-76%.
* 24 HR TREND......23% WETTER.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 9 TO 16 MPH. GUSTS TO 25 MPH
INCREASING TO 30 MPH AFTER MIDNIGHT.
* RIDGE TOP........SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 50
MPH INCREASING TO 30 TO 45 MPH WITH GUSTS TO
80 MPH AFTER MIDNIGHT.
* CHC WETTING RAIN...40%.
* MIXING HEIGHT......800-1300 FT AGL.
* TRANSPORT WINDS....SOUTHWEST 10 TO 15 MPH INCREASING TO 15 TO 25
MPH AFTER MIDNIGHT.
* VENTILATION........FAIR INCREASING TO GOOD AFTER MIDNIGHT.
SUNDAY
* SKY/WEATHER........CHANCE OF RAIN IN THE MORNING. SNOW LIKELY.
RAIN LIKELY IN THE AFTERNOON.
* CHANCE OF THUNDER..0%.
* MAX TEMPERATURE....
* VALLEYS..........47-57.
* MID SLOPE........43-53.
* MIN HUMIDITY.......
* VALLEYS..........39-49%.
* MID SLOPE........42-52%.
* 20-FOOT WINDS......
* VALLEYS/SLOPE....SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 40
MPH INCREASING TO 20 TO 30 MPH WITH GUSTS TO
50 MPH LATE IN THE AFTERNOON.
* RIDGE TOP........SOUTHWEST WINDS 40 TO 60 MPH WITH GUSTS TO 90
MPH.
* CHC WETTING RAIN...50%.
* MIXING HEIGHT......1300-1800 FT AGL INCREASING TO 3100-4100 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS....SOUTHWEST 25 TO 35 MPH INCREASING TO 30 TO 50
MPH IN THE AFTERNOON.
* VENTILATION........EXCELLENT.
EXTENDED
SUNDAY NIGHT
SNOW LIKELY AND A CHANCE OF RAIN. LOWS 29-39.
SOUTHWEST WINDS 20 TO 30 MPH DECREASING TO 15 TO 25 MPH AFTER
MIDNIGHT.
MONDAY
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW. HIGHS 44-54. LOWS
24-34. SOUTHWEST WINDS 10 TO 20 MPH.
TUESDAY
MOSTLY CLOUDY. CHANCE OF SNOW AND RAIN. HIGHS 43-53. LOWS
23-33. SOUTH WINDS 10 TO 20 MPH.
WEDNESDAY
SNOW AND RAIN. HIGHS 35-45. LOWS 19-29. SOUTH WINDS
10 TO 15 MPH.
CHRISTMAS DAY
SNOW AND RAIN. HIGHS 34-44. LOWS 15-25.
FRIDAY
SNOW AND RAIN LIKELY. HIGHS 32-42.
.8 TO 14 DAY OUTLOOK FOR (SAT DEC 27 THROUGH FRI JAN 2)
ABOVE NORMAL TEMPERATURES AND PRECIPITATION.
=
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