469 FNUS55 KREV 301118 FWFREV Fire Weather Planning Forecast National Weather Service Reno NV 318 AM PST Tue Dec 30 2025 .DISCUSSION... Dry conditions continue through Wednesday, with very cold overnight lows and chilly afternoon highs. Valley inversions continue with freezing fog likely for fog-prone Sierra communities again this morning. Ridges may be gusty, otherwise light winds before the next system. Active weather returns as early as Wednesday morning with high snow levels (over 9 kft). A second, colder system arrives Friday night, dropping snow levels to 5-6 kft. 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 NVZ420-310030- Northern Sierra Front including Carson City, Douglas, Storey, Southern Washoe, Western Lyon, and Far Southern Lassen Counties- 318 AM PST Tue Dec 30 2025 .TODAY... * Sky/Weather........Sunny then becoming partly cloudy. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........40-48. * Mid Slope........37-47. * 24 hr trend......Little change. * Min Humidity....... * Valleys..........37-47%. * Mid Slope........36-46%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Southeast 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. .TONIGHT... * Sky/Weather........Mostly cloudy. * Chance of Thunder..0%. * Min Temperature.... * Valleys..........16-26. * Mid Slope........24-33. * 24 hr trend......7 degrees warmer. * Max Humidity....... * Valleys..........69-79%. * Mid Slope........51-61%. * 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......700 ft agl. * Transport Winds....Light winds. * Ventilation........Poor. .WEDNESDAY... * Sky/Weather........Cloudy. Slight chance of rain and snow in the afternoon. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........41-51. * Mid Slope........39-49. * Min Humidity....... * Valleys..........43-53%. * Mid Slope........42-52%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Light winds. * Chc Wetting Rain...5%. * Mixing Height......800 ft agl. * Transport Winds....Light winds. * Ventilation........Poor. .Extended... .WEDNESDAY NIGHT...Cloudy. Chance of rain and snow. Lows 28-38. Downslope 2 to 5 mph. .NEW YEARS DAY...Mostly cloudy. Chance of rain. Highs 43-53. Lows 28-38. Slope winds. .FRIDAY...Mostly cloudy. Chance of rain and snow. Highs 47-56. Lows 28-38. South winds 10 to 15 mph. .SATURDAY...Mostly cloudy. Chance of rain and snow. Highs 43-51. Lows 24-34. Southwest winds 10 to 15 mph. .SUNDAY THROUGH MONDAY...Mostly cloudy. Chance of snow and rain. Highs 42-52. Lows 21-31. $$ NVZ421-310030- Southern Sierra Front including Alpine, Northern Mono, Southern Lyon, and Western Mineral Counties- 318 AM PST Tue Dec 30 2025 .TODAY... * Sky/Weather........Sunny then becoming partly cloudy. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........43-51. * Mid Slope........38-48. * 24 hr trend......11 degrees warmer. * Min Humidity....... * Valleys..........34-44%. * Mid Slope........29-39%. * 24 hr trend......13% drier. * 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...0%. * Mixing Height......800 ft agl. * Transport Winds....South 10 to 15 mph. * Ventilation........Marginal. .TONIGHT... * Sky/Weather........Mostly cloudy. * Chance of Thunder..0%. * Min Temperature.... * Valleys..........17-27. * Mid Slope........24-34. * 24 hr trend......11 degrees warmer. * Max Humidity....... * Valleys..........64-74%. * Mid Slope........45-55%. * 24 hr trend......5% drier. * 20-Foot Winds...... * Valleys/Slope....Downslope 2 to 5 mph. * Ridge Top........Light winds becoming south 10 to 15 mph after midnight. * Chc Wetting Rain...0%. * Mixing Height......800 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .WEDNESDAY... * Sky/Weather........Cloudy. Chance of rain and snow in the afternoon. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........43-53. * Mid Slope........39-49. * Min Humidity....... * Valleys..........42-52%. * Mid Slope........42-52%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........South winds 10 to 15 mph. Gusts to 25 mph in the morning. * Chc Wetting Rain...15%. * Mixing Height......800 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .Extended... .WEDNESDAY NIGHT...Chance of snow in the evening. Chance of rain. Snow likely after midnight. Lows 27-37. Downslope 2 to 5 mph. .NEW YEARS DAY...Mostly cloudy. Chance of rain and snow. Highs 44-54. Lows 25-35. Slope winds. .FRIDAY...Snow likely and a chance of rain. Highs 45-55. Lows 23-33. South winds 10 to 15 mph. .SATURDAY...Snow and rain likely. Highs 41-51. Lows 16-26. Southwest winds 10 to 15 mph. .SUNDAY THROUGH MONDAY...Mostly cloudy. Chance of snow. Highs 41-51. Lows 15-25. $$ CAZ272-310030- Greater Lake Tahoe and Truckee Area- 318 AM PST Tue Dec 30 2025 .TODAY... * Sky/Weather........Sunny then becoming partly cloudy. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........41-47. * Mid Slope........36-46. * 24 hr trend......7 degrees warmer. * Min Humidity....... * Valleys..........53-63%. * Mid Slope........34-44%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Southeast winds 10 to 15 mph with gusts to 30 mph. * Chc Wetting Rain...0%. * Mixing Height......800 ft agl. * Transport Winds....Southeast 10 to 15 mph. * Ventilation........Marginal. .TONIGHT... * Sky/Weather........Mostly cloudy. * Chance of Thunder..0%. * Min Temperature.... * Valleys..........21-31. * Mid Slope........23-33. * 24 hr trend......8 degrees warmer. * Max Humidity....... * Valleys..........74-84%. * Mid Slope........43-53%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Downslope 2 to 5 mph. * Ridge Top........South winds 10 to 15 mph. Gusts to 20 mph in the morning. * Chc Wetting Rain...0%. * Mixing Height......700 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .WEDNESDAY... * Sky/Weather........Cloudy. Chance of rain and snow in the afternoon. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........42-48. * Mid Slope........38-46. * Min Humidity....... * Valleys..........67-77%. * Mid Slope........52-62%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Southwest winds 10 to 15 mph. Gusts to 25 mph until late afternoon. * Chc Wetting Rain...15%. * Mixing Height......700 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .Extended... .WEDNESDAY NIGHT...Rain and snow likely. Lows 28-38. Downslope 2 to 5 mph. .NEW YEARS DAY...Rain and snow likely. Highs 40-46. Lows 28-38. Slope winds. .FRIDAY...Rain and snow likely. Highs 40-46. Lows 24-34. Southwest winds 10 to 15 mph. .SATURDAY...Snow likely. Highs 34-40. Lows 20-30. Southwest winds 10 to 15 mph. .SUNDAY THROUGH MONDAY...Mostly cloudy. Chance of snow. Highs 34-43. Lows 17-27. $$ NVZ423-310030- West Humboldt Basin in Pershing County- 318 AM PST Tue Dec 30 2025 .TODAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........42-49. * Mid Slope........40-48. * 24 hr trend......6 degrees warmer. * Min Humidity....... * Valleys..........21-31%. * Mid Slope........25-35%. * 24 hr trend......6% drier. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Light winds. * Chc Wetting Rain...0%. * Mixing Height......600-1100 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .TONIGHT... * Sky/Weather........Partly cloudy then becoming mostly cloudy. * Chance of Thunder..0%. * Min Temperature.... * Valleys..........16-26. * Mid Slope........23-33. * 24 hr trend......5 degrees warmer. * Max Humidity....... * Valleys..........59-69%. * Mid Slope........35-45%. * 24 hr trend......5% drier. * 20-Foot Winds...... * Valleys/Slope....Downslope 2 to 5 mph. * Ridge Top........Light winds becoming south 10 to 15 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........Mostly cloudy. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........44-52. * Mid Slope........42-50. * Min Humidity....... * Valleys..........23-33%. * Mid Slope........27-37%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Light winds becoming southwest 10 to 15 mph in the afternoon. Gusts to 20 mph in the morning. * Chc Wetting Rain...0%. * Mixing Height......700 ft agl. * Transport Winds....Light winds. * Ventilation........Poor. .Extended... .WEDNESDAY NIGHT...Cloudy. Chance of rain and snow. Lows 29-38. Downslope 2 to 5 mph. .NEW YEARS DAY...Mostly cloudy. Chance of rain. Highs 46-52. Lows 29-38. Slope winds. .FRIDAY...Mostly cloudy. Chance of rain. Highs 51-57. Lows 30-38. Slope winds. .SATURDAY...Mostly cloudy. Chance of rain and snow. Highs 47-53. Lows 26-36. Slope winds. .SUNDAY THROUGH MONDAY...Mostly cloudy. Slight chance of rain and snow. Highs 45-51. Lows 24-34. $$ NVZ429-310030- Lahontan Basin including Churchill and Eastern Mineral Counties- 318 AM PST Tue Dec 30 2025 .TODAY... * Sky/Weather........Sunny then becoming partly cloudy. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........40-50. * Mid Slope........39-49. * 24 hr trend......6 degrees warmer. * Min Humidity....... * Valleys..........22-32%. * Mid Slope........18-28%. * 24 hr trend......11% drier. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Light winds. * Chc Wetting Rain...0%. * Mixing Height......600-1100 ft agl. * Transport Winds....Southeast 10 to 15 mph. * Ventilation........Fair. .TONIGHT... * Sky/Weather........Mostly cloudy. * Chance of Thunder..0%. * Min Temperature.... * Valleys..........15-25. * Mid Slope........26-36. * 24 hr trend......7 degrees warmer. * Max Humidity....... * Valleys..........60-70%. * Mid Slope........36-46%. * 24 hr trend......7% drier. * 20-Foot Winds...... * Valleys/Slope....Downslope 2 to 5 mph. * Ridge Top........Southeast winds 10 to 15 mph with gusts to 25 mph. * Chc Wetting Rain...0%. * Mixing Height......700 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .WEDNESDAY... * Sky/Weather........Cloudy. Slight chance of rain and snow in the afternoon. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........43-51. * Mid Slope........40-50. * Min Humidity....... * Valleys..........27-37%. * Mid Slope........23-33%. * 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 ft agl. * Transport Winds....Light winds. * Ventilation........Fair. .Extended... .WEDNESDAY NIGHT...Cloudy. Chance of snow in the evening. Chance of rain. Lows 26-36. Downslope 2 to 5 mph. .NEW YEARS DAY...Mostly cloudy. Chance of rain. Highs 45-55. Lows 26-36. South winds 10 to 15 mph. .FRIDAY...Mostly cloudy. Chance of rain. Highs 48-58. Lows 27-37. Southeast winds 10 to 15 mph. .SATURDAY...Mostly cloudy. Chance of rain and snow. Highs 46-55. Lows 23-33. South winds 10 to 15 mph. .SUNDAY...Partly cloudy. Slight chance of rain and snow. Highs 44-54. Lows 21-31. .MONDAY...Mostly cloudy. Slight chance of rain and snow. Highs 44-54. $$ CAZ270-278-NVZ458-310030- Surprise Valley California-Eastern Lassen County- Northern Washoe County- 318 AM PST Tue Dec 30 2025 .TODAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........38-48. * Mid Slope........36-46. * 24 hr trend......Little change. * Min Humidity....... * Valleys..........35-45%. * Mid Slope........33-43%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Southeast winds 10 to 15 mph. Gusts to 25 mph late in the afternoon. * Chc Wetting Rain...0%. * Mixing Height......800 ft agl. * Transport Winds....Southeast 10 to 15 mph. * Ventilation........Marginal. .TONIGHT... * Sky/Weather........Partly cloudy then becoming mostly cloudy. * Chance of Thunder..0%. * Min Temperature.... * Valleys..........15-25. * Mid Slope........21-31. * 24 hr trend......4 degrees warmer. * Max Humidity....... * Valleys..........66-76%. * Mid Slope........45-55%. * 24 hr trend......5% drier. * 20-Foot Winds...... * Valleys/Slope....Downslope 2 to 5 mph. * Ridge Top........Southeast winds 10 to 15 mph. * Chc Wetting Rain...0%. * Mixing Height......700 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .WEDNESDAY... * Sky/Weather........Mostly cloudy. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........40-50. * Mid Slope........39-49. * Min Humidity....... * Valleys..........35-45%. * Mid Slope........33-43%. * 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 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .Extended... .WEDNESDAY NIGHT...Cloudy. Chance of rain and snow. Lows 28-38. Downslope 2 to 5 mph. .NEW YEARS DAY...Cloudy. Chance of rain and snow. Highs 40-49. Lows 28-38. Southeast winds 10 to 15 mph. .FRIDAY...Rain and snow likely. Highs 44-54. Lows 27-37. South winds 10 to 15 mph. .SATURDAY...Mostly cloudy. Chance of snow and rain. Highs 38-48. Lows 24-34. Southwest winds 10 to 15 mph. .SUNDAY THROUGH MONDAY...Mostly cloudy. Chance of snow and rain. Highs 39-49. Lows 22-32. $$ CAZ271-310030- Western Lassen, Eastern Plumas, and Eastern Sierra Counties- 318 AM PST Tue Dec 30 2025 .TODAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........39-49. * Mid Slope........36-46. * 24 hr trend......Little change. * Min Humidity....... * Valleys..........42-52%. * Mid Slope........43-53%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. Gusts to 20 mph until late afternoon. * Ridge Top........Southeast winds 10 to 15 mph. * Chc Wetting Rain...0%. * Mixing Height......800 ft agl. * Transport Winds....Southeast 10 to 15 mph. * Ventilation........Marginal. .TONIGHT... * Sky/Weather........Mostly cloudy. * Chance of Thunder..0%. * Min Temperature.... * Valleys..........13-23. * Mid Slope........23-33. * 24 hr trend......6 degrees warmer. * Max Humidity....... * Valleys..........67-77%. * Mid Slope........51-61%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Downslope 2 to 5 mph. * Ridge Top........Light winds. * Chc Wetting Rain...0%. * Mixing Height......700 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .WEDNESDAY... * Sky/Weather........Mostly cloudy. Slight chance of rain and snow in the afternoon. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........42-52. * Mid Slope........40-50. * Min Humidity....... * Valleys..........46-56%. * Mid Slope........48-58%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Light winds. Gusts to 20 mph in the morning. * Chc Wetting Rain...5%. * Mixing Height......700 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .Extended... .WEDNESDAY NIGHT...Rain likely. Lows 25-35. Downslope 2 to 5 mph. .NEW YEARS DAY...Rain likely. Highs 39-49. Lows 25-35. Slope winds. .FRIDAY...Rain and snow. Highs 41-51. Lows 26-36. South winds 10 to 15 mph. .SATURDAY...Snow and rain likely. Highs 36-44. Lows 21-31. Slope winds. .SUNDAY THROUGH MONDAY...Mostly cloudy. Chance of snow and rain. Highs 38-48. Lows 18-28. $$ CAZ274-310030- Southern Mono County- 318 AM PST Tue Dec 30 2025 .TODAY... * Sky/Weather........Partly cloudy then becoming mostly cloudy. Freezing fog in the morning. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........33-43. * Mid Slope........30-40. * 24 hr trend......15 degrees warmer. * Min Humidity....... * Valleys..........28-38%. * Mid Slope........29-39%. * 24 hr trend......19% drier. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Southeast winds 10 to 15 mph with gusts to 30 mph. * Chc Wetting Rain...0%. * Mixing Height......800 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .TONIGHT... * Sky/Weather........Mostly cloudy. * Chance of Thunder..0%. * Min Temperature.... * Valleys..........16-26. * Mid Slope........19-29. * 24 hr trend......12 degrees warmer. * Max Humidity....... * Valleys..........73-83%. * Mid Slope........47-57%. * 24 hr trend......Little change. * 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......800 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .WEDNESDAY... * Sky/Weather........Cloudy. Chance of rain and snow in the afternoon. * Chance of Thunder..0%. * Max Temperature.... * Valleys..........39-49. * Mid Slope........36-46. * Min Humidity....... * Valleys..........50-60%. * Mid Slope........51-61%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Southwest winds 10 to 15 mph with gusts to 35 mph. * Chc Wetting Rain...20%. * Mixing Height......800 ft agl. * Transport Winds....Light winds. * Ventilation........Marginal. .Extended... .WEDNESDAY NIGHT...Cloudy. Chance of rain and snow. Lows 27-37. Downslope 2 to 5 mph. .NEW YEARS DAY...Mostly cloudy. Chance of rain and snow. Highs 39-49. Lows 23-33. Slope winds. .FRIDAY THROUGH SATURDAY...Mostly cloudy. Chance of snow and rain. Highs 38-48. Lows 16-26. Southwest winds 10 to 15 mph. .SUNDAY THROUGH MONDAY...Mostly cloudy. Chance of snow and rain. Highs 38-48. Lows 14-24. $$ .8 to 14 day outlook for (Tue Jan 6 through Mon Jan 12) Above normal temperatures and precipitation. = $$ http://weather.gov/reno