Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Reno, NV
Issued by NWS Reno, NV
998
FNUS55 KREV 090854
FWFREV
Fire Weather Planning Forecast
National Weather Service Reno NV
1254 AM PST Tue Dec 9 2025
.DISCUSSION...
Dry and unseasonably warm into the weekend with light transport
winds limiting smoke ventilation. Overnight recoveries remain
good across lower elevations, but become poor along mountain tops
towards the end of the week. A trend towards a wetter and windier
pattern is possible during the week of December 15, but forecast
confidence is low.
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
NVZ420-100030-
Northern Sierra Front including Carson City, Douglas, Storey,
Southern Washoe, Western Lyon, and Far Southern Lassen Counties-
1254 AM PST Tue Dec 9 2025
.TODAY...
* Sky/Weather........Partly cloudy then becoming sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........55-65.
* Mid Slope........54-64.
* 24 hr trend......5 degrees warmer.
* Min Humidity.......
* Valleys..........19-29%.
* Mid Slope........22-32%.
* 24 hr trend......5% drier.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........West winds 10 to 15 mph with gusts to 30 mph.
* Chc Wetting Rain...0%.
* Mixing Height......600-800 ft agl increasing to 900-1400 ft agl
in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Marginal.
.TONIGHT...
* Sky/Weather........Clear.
* Chance of Thunder..0%.
* Min Temperature....
* Valleys..........29-39.
* Mid Slope........34-41.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........64-74%.
* Mid Slope........41-51%.
* 24 hr trend......5% drier.
* 20-Foot Winds......
* Valleys/Slope....Downslope 2 to 5 mph.
* Ridge Top........Southwest winds 10 to 15 mph.
* Chc Wetting Rain...0%.
* Mixing Height......700 ft agl.
* Transport Winds....Light winds.
* Ventilation........Poor.
.WEDNESDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........54-64.
* Mid Slope........53-63.
* Min Humidity.......
* Valleys..........22-32%.
* Mid Slope........26-36%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........Southwest winds 10 to 15 mph in the morning
becoming light.
* Chc Wetting Rain...0%.
* Mixing Height......700-1200 ft agl.
* Transport Winds....Light winds.
* Ventilation........Poor.
.Extended...
.WEDNESDAY NIGHT...Clear. Lows 29-39. Downslope 2 to 5 mph.
.THURSDAY...Clear. Highs 54-64. Lows 25-35. Slope winds.
.FRIDAY THROUGH SATURDAY...Clear. Highs 52-62. Lows 25-35. Slope
winds.
.SUNDAY THROUGH MONDAY...Partly cloudy. Highs 52-62. Lows 26-36.
$$
NVZ421-100030-
Southern Sierra Front including Alpine, Northern Mono, Southern
Lyon, and Western Mineral Counties-
1254 AM PST Tue Dec 9 2025
.TODAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........57-67.
* Mid Slope........52-62.
* 24 hr trend......5 degrees warmer.
* Min Humidity.......
* Valleys..........17-27%.
* Mid Slope........12-22%.
* 24 hr trend......8% drier.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........Northwest winds 10 to 20 mph with gusts to 30
mph.
* Chc Wetting Rain...0%.
* Mixing Height......600-900 ft agl increasing to 1100-1600 ft agl
in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Fair.
.TONIGHT...
* Sky/Weather........Clear.
* Chance of Thunder..0%.
* Min Temperature....
* Valleys..........27-37.
* Mid Slope........33-43.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........44-54%.
* Mid Slope........31-41%.
* 24 hr trend......8% drier.
* 20-Foot Winds......
* Valleys/Slope....Downslope 2 to 5 mph.
* Ridge Top........West winds 10 to 15 mph with gusts to 25 mph.
* Chc Wetting Rain...0%.
* Mixing Height......800 ft agl.
* Transport Winds....Light winds.
* Ventilation........Poor.
.WEDNESDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........57-67.
* Mid Slope........52-62.
* Min Humidity.......
* Valleys..........20-30%.
* Mid Slope........14-24%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........Northwest winds 10 to 15 mph.
* Chc Wetting Rain...0%.
* Mixing Height......600-900 ft agl increasing to 900-1400 ft agl
in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Marginal.
.Extended...
.WEDNESDAY NIGHT...Clear. Lows 27-37. Downslope 2 to 5 mph.
.THURSDAY...Clear. Highs 57-67. Lows 25-35. Slope winds.
.FRIDAY...Clear. Highs 55-65. Lows 25-35. Slope winds.
.SATURDAY...Clear. Highs 55-65. Lows 25-35. Slope winds.
.SUNDAY THROUGH MONDAY...Partly cloudy. Highs 54-64. Lows 25-35.
$$
CAZ272-100030-
Greater Lake Tahoe and Truckee Area-
1254 AM PST Tue Dec 9 2025
.TODAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........54-62.
* Mid Slope........51-61.
* 24 hr trend......4 degrees warmer.
* Min Humidity.......
* Valleys..........38-48%.
* Mid Slope........30-40%.
* 24 hr trend......9% wetter.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........Northwest winds 10 to 20 mph with gusts to 35
mph.
* Chc Wetting Rain...0%.
* Mixing Height......600-800 ft agl increasing to 900-1400 ft agl
in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Marginal.
.TONIGHT...
* Sky/Weather........Clear.
* Chance of Thunder..0%.
* Min Temperature....
* Valleys..........29-39.
* Mid Slope........32-42.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........57-67%.
* Mid Slope........36-46%.
* 24 hr trend......7% drier.
* 20-Foot Winds......
* Valleys/Slope....Downslope 2 to 5 mph.
* Ridge Top........Northwest winds 10 to 15 mph with gusts to 25
mph shifting to the north in the late evening
and overnight.
* Chc Wetting Rain...0%.
* Mixing Height......700 ft agl.
* Transport Winds....Light winds.
* Ventilation........Poor.
.WEDNESDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........55-63.
* Mid Slope........51-61.
* Min Humidity.......
* Valleys..........39-49%.
* Mid Slope........31-41%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........Light winds.
* Chc Wetting Rain...0%.
* Mixing Height......700-1200 ft agl.
* Transport Winds....Light winds.
* Ventilation........Poor.
.Extended...
.WEDNESDAY NIGHT...Clear. Lows 27-37. Downslope 2 to 5 mph.
.THURSDAY...Clear. Highs 55-63. Lows 23-33. Slope winds.
.FRIDAY...Clear. Highs 53-61. Lows 23-33. Slope winds.
.SATURDAY...Clear. Highs 53-61. Lows 25-35. Slope winds.
.SUNDAY...Partly cloudy. Highs 50-56. Lows 25-35.
.MONDAY...Partly cloudy. Slight chance of rain and snow. Highs
50-56.
$$
NVZ423-100030-
West Humboldt Basin in Pershing County-
1254 AM PST Tue Dec 9 2025
.TODAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........54-60.
* Mid Slope........51-59.
* 24 hr trend......4 degrees warmer.
* Min Humidity.......
* Valleys..........19-29%.
* Mid Slope........26-36%.
* 24 hr trend......6% drier.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........Southwest winds 10 to 15 mph with gusts to 40
mph.
* Chc Wetting Rain...0%.
* Mixing Height......600-800 ft agl increasing to 800-1300 ft agl
in the afternoon.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Fair.
.TONIGHT...
* Sky/Weather........Clear.
* Chance of Thunder..0%.
* Min Temperature....
* Valleys..........26-36.
* Mid Slope........31-40.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........70-80%.
* Mid Slope........47-57%.
* 24 hr trend......6% drier.
* 20-Foot Winds......
* Valleys/Slope....Downslope 2 to 5 mph.
* Ridge Top........Southwest winds 10 to 15 mph with gusts to 30
mph.
* Chc Wetting Rain...0%.
* Mixing Height......700 ft agl.
* Transport Winds....Light winds.
* Ventilation........Poor.
.WEDNESDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........56-62.
* Mid Slope........52-60.
* Min Humidity.......
* Valleys..........19-29%.
* Mid Slope........26-36%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........Southwest winds 10 to 15 mph with gusts to 25
mph.
* Chc Wetting Rain...0%.
* Mixing Height......600-1100 ft agl.
* Transport Winds....Light winds.
* Ventilation........Marginal.
.Extended...
.WEDNESDAY NIGHT...Clear. Lows 24-34. Downslope 2 to 5 mph.
.THURSDAY...Clear. Highs 54-62. Lows 22-32. Slope winds.
.FRIDAY...Clear. Highs 53-59. Lows 21-31. Slope winds.
.SATURDAY...Partly cloudy. Highs 50-58. Lows 21-31. Slope winds.
.SUNDAY THROUGH MONDAY...Partly cloudy. Highs 52-59. Lows 22-32.
$$
NVZ429-100030-
Lahontan Basin including Churchill and Eastern Mineral Counties-
1254 AM PST Tue Dec 9 2025
.TODAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........54-64.
* Mid Slope........52-62.
* 24 hr trend......4 degrees warmer.
* Min Humidity.......
* Valleys..........21-31%.
* Mid Slope........22-32%.
* 24 hr trend......10% drier.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........West winds 10 to 15 mph with gusts to 30 mph.
* Chc Wetting Rain...0%.
* Mixing Height......600-800 ft agl increasing to 900-1400 ft agl
in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Fair.
.TONIGHT...
* Sky/Weather........Clear.
* Chance of Thunder..0%.
* Min Temperature....
* Valleys..........25-35.
* Mid Slope........31-41.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........63-73%.
* Mid Slope........37-47%.
* 24 hr trend......6% drier.
* 20-Foot Winds......
* Valleys/Slope....Downslope 2 to 5 mph.
* Ridge Top........Northwest winds 10 to 15 mph with gusts to 25
mph shifting to the west with gusts to 25 mph
in the late evening and overnight.
* Chc Wetting Rain...0%.
* Mixing Height......700 ft agl.
* Transport Winds....Light winds.
* Ventilation........Poor.
.WEDNESDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........54-64.
* Mid Slope........52-62.
* Min Humidity.......
* Valleys..........25-35%.
* Mid Slope........25-35%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........West winds 10 to 15 mph.
* Chc Wetting Rain...0%.
* Mixing Height......600-700 ft agl increasing to 700-1200 ft agl
in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Marginal.
.Extended...
.WEDNESDAY NIGHT...Clear. Lows 22-32. Downslope 2 to 5 mph.
.THURSDAY...Clear. Highs 54-64. Lows 20-30. Slope winds.
.FRIDAY THROUGH SATURDAY...Clear. Highs 51-61. Lows 20-30. Slope
winds.
.SUNDAY THROUGH MONDAY...Partly cloudy. Highs 51-61. Lows 21-31.
$$
CAZ270-278-NVZ458-100030-
Surprise Valley California-Eastern Lassen County-
Northern Washoe County-
1254 AM PST Tue Dec 9 2025
.TODAY...
* Sky/Weather........Partly cloudy then becoming sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........53-63.
* Mid Slope........51-59.
* 24 hr trend......5 degrees warmer.
* Min Humidity.......
* Valleys..........32-42%.
* Mid Slope........35-45%.
* 24 hr trend......4% drier.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........West winds 10 to 15 mph with gusts to 40 mph.
* Chc Wetting Rain...0%.
* Mixing Height......600-700 ft agl increasing to 1300-1800 ft agl
in the afternoon.
* Transport Winds....West 10 to 15 mph.
* Ventilation........Marginal.
.TONIGHT...
* Sky/Weather........Clear then becoming partly cloudy.
* Chance of Thunder..0%.
* Min Temperature....
* Valleys..........28-38.
* Mid Slope........29-38.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........75-85%.
* Mid Slope........62-72%.
* 24 hr trend......4% drier.
* 20-Foot Winds......
* Valleys/Slope....Downslope 2 to 5 mph.
* Ridge Top........West winds 10 to 15 mph with gusts to 30 mph.
* Chc Wetting Rain...0%.
* Mixing Height......700 ft agl.
* Transport Winds....Light winds.
* Ventilation........Marginal.
.WEDNESDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........54-64.
* Mid Slope........53-61.
* Min Humidity.......
* Valleys..........32-42%.
* Mid Slope........35-45%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........West winds 10 to 15 mph with gusts to 25 mph.
* Chc Wetting Rain...0%.
* Mixing Height......600-700 ft agl increasing to 700-1200 ft agl
in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Fair.
.Extended...
.WEDNESDAY NIGHT...Clear. Lows 26-36. Downslope 2 to 5 mph.
.THURSDAY...Clear. Highs 53-63. Lows 22-32. Slope winds.
.FRIDAY...Clear. Highs 50-60. Lows 22-32. Slope winds.
.SATURDAY...Partly cloudy. Highs 49-59. Lows 23-33. Slope winds.
.SUNDAY...Partly cloudy. Highs 48-58. Lows 23-33.
.MONDAY...Partly cloudy. Slight chance of rain. Highs 49-59.
$$
CAZ271-100030-
Western Lassen, Eastern Plumas, and Eastern Sierra Counties-
1254 AM PST Tue Dec 9 2025
.TODAY...
* Sky/Weather........Partly cloudy then becoming sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........54-64.
* Mid Slope........52-62.
* 24 hr trend......4 degrees warmer.
* Min Humidity.......
* Valleys..........35-45%.
* Mid Slope........35-45%.
* 24 hr trend......Little change.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........West winds 10 to 15 mph with gusts to 30 mph.
* Chc Wetting Rain...0%.
* Mixing Height......600-700 ft agl increasing to 1100-1600 ft agl
in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Fair.
.TONIGHT...
* Sky/Weather........Clear.
* Chance of Thunder..0%.
* Min Temperature....
* Valleys..........27-37.
* Mid Slope........31-41.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........71-81%.
* Mid Slope........49-59%.
* 24 hr trend......9% drier.
* 20-Foot Winds......
* Valleys/Slope....Downslope 2 to 5 mph.
* Ridge Top........Northwest winds 10 to 15 mph shifting to the
north in the late evening and overnight.
* Chc Wetting Rain...0%.
* Mixing Height......700 ft agl.
* Transport Winds....Light winds.
* Ventilation........Poor.
.WEDNESDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........57-65.
* Mid Slope........55-63.
* Min Humidity.......
* Valleys..........35-45%.
* Mid Slope........35-45%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........Light winds.
* Chc Wetting Rain...0%.
* Mixing Height......600-700 ft agl increasing to 800-1300 ft agl
in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Marginal.
.Extended...
.WEDNESDAY NIGHT...Clear. Lows 24-34. Downslope 2 to 5 mph.
.THURSDAY...Clear. Highs 56-64. Lows 20-30. Slope winds.
.FRIDAY...Clear. Highs 54-62. Lows 20-30. Slope winds.
.SATURDAY...Clear. Highs 53-61. Lows 22-32. Slope winds.
.SUNDAY...Partly cloudy. Highs 50-58. Lows 22-32.
.MONDAY...Partly cloudy. Slight chance of rain. Highs 50-58.
$$
CAZ274-100030-
Southern Mono County-
1254 AM PST Tue Dec 9 2025
.TODAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........54-64.
* Mid Slope........51-61.
* 24 hr trend......4 degrees warmer.
* Min Humidity.......
* Valleys..........12-22%.
* Mid Slope........13-23%.
* 24 hr trend......8% drier.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........Northwest winds 10 to 15 mph with gusts to 30
mph.
* Chc Wetting Rain...0%.
* Mixing Height......600-1000 ft agl increasing to 1000-1500 ft agl
in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Fair.
.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..........51-61%.
* Mid Slope........34-44%.
* 24 hr trend......9% drier.
* 20-Foot Winds......
* Valleys/Slope....Downslope 2 to 5 mph.
* Ridge Top........Northwest winds 10 to 15 mph with gusts to 25
mph.
* Chc Wetting Rain...0%.
* Mixing Height......800 ft agl.
* Transport Winds....Light winds.
* Ventilation........Marginal.
.WEDNESDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
* Valleys..........54-64.
* Mid Slope........51-61.
* Min Humidity.......
* Valleys..........14-24%.
* Mid Slope........15-25%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........Northwest winds 10 to 15 mph in the morning
becoming light.
* Chc Wetting Rain...0%.
* Mixing Height......600-1000 ft agl increasing to 1000-1500 ft agl
in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Marginal.
.Extended...
.WEDNESDAY NIGHT...Clear. Lows 27-37. Downslope 2 to 5 mph.
.THURSDAY...Clear. Highs 55-65. Lows 26-36. Slope winds.
.FRIDAY...Clear. Highs 55-65. Lows 26-36. Slope winds.
.SATURDAY...Clear. Highs 52-62. Lows 25-35. Slope winds.
.SUNDAY THROUGH MONDAY...Partly cloudy. Highs 52-62. Lows 25-35.
$$
.8 to 14 day outlook for (Tue Dec 16 through Mon Dec 22)
Above normal temperatures and precipitation.
=
$$
http://weather.gov/reno