848 FNUS75 KREV 131600 FWSREV Spot Forecast for Diamond WUI Piles...USFS - Lassen NF National Weather Service Reno NV 800 AM PST Wed Nov 13 2024 Forecast is based on ignition time of 0900 PST on November 13. If conditions become unrepresentative...contact the National Weather Service in Reno. ...WIND ADVISORY IN EFFECT FROM 10 AM TO 4 PM PST WEDNESDAY... .DISCUSSION... * The next storm arrives today bringing gusty southwest winds along with chances for mountain snow and valley rain. * Wetting rains (at least 0.10") arrive between 2-3 PM to the burn site with potential for rain/snow mix after 6 PM. There is a 40% chance of at least 2" of snow Wednesday night into Thursday. * Potential for wintry precipitation persists Thursday into the weekend with temperatures cooling to below average for the weekend. .WEDNESDAY... Sky/Weather.........Partly cloudy then becoming mostly cloudy. Chance of rain and snow early in the afternoon. Temperature.........40 at ignition...Max 44-46. RH..................48% at ignition...Min 40-42%. 20-Foot Winds.......Winds south at 8 mph at ignition...otherwise South winds 7-8 mph increasing to southwest 18-23 mph with gusts to around 35 mph. LAL.................1. Chc Wetting Rain....0% increasing to 70% after 2PM in the afternoon. Mixing Height.......2100-3100 ft agl. Transport Winds.....Southwest around 20 mph increasing to around 40 mph in the afternoon. Ventilation.........Fair to excellent. Haines Index........4 at ignition...max 4. TIME (PST) 9 AM NOON 3 PM Sky (%).........30 52 82 Weather cov..... CHANCE LIKELY Weather type....NONE RNSN RAIN Tstm cov........ CWR.............0 70 70 LAL.............1 1 1 Temp............40 44 41 RH..............48 47 66 20 FT wind......S 8G15 SW 23G35 SW 23G35 Mx ht msl (kft).1.7 3.1 3.0 Transport wind..SW 20 SW 40 SW 40 Haines index....4 3 3 Vrate kt-ft/1K..31 105 108 Ventrate Cat....POOR VYGD VYGD .WEDNESDAY NIGHT... Sky/Weather.........Mostly cloudy. Rain likely in the evening, then chance of rain overnight. Chance of snow after 3 am. Temperature.........Min 32-36. RH..................Max 85-89%. 20-Foot Winds.......Southwest winds 11-16 mph decreasing to 7-9 mph. LAL.................1. Chc Wetting Rain....55% decreasing to 15% overnight. Mixing Height.......800-1300 ft agl. Transport Winds.....Southwest around 30 mph decreasing to 15-20 mph in the late evening and overnight. Ventilation.........Good to marginal. Haines Index........3. TIME (PST) 4 PM 7 PM 10 PM 1 AM Sky (%).........76 76 55 58 Weather cov.....LIKELY LIKELY CHANCE CHANCE Weather type....RAIN RAIN RAIN RNSN Tstm cov........ CWR.............60 60 20 20 LAL.............1 1 1 1 Temp............41 38 39 38 RH..............71 82 77 80 20 FT wind......SW 16G25 SW 13G20 SW 14G20 SW 9G15 Mx ht msl (kft).1.7 0.9 0.7 0.7 Transport wind..SW 30 SW 20 SW 20 SW 15 Haines index....3 3 3 3 Vrate kt-ft/1K..43 15 13 9 Ventrate Cat....FAIR POOR POOR POOR .THURSDAY... Sky/Weather.........Mostly cloudy. Chance of rain/snow mix in the morning. Temperature.........Max 42-44. RH..................Min 56-59%. 20-Foot Winds.......Southwest winds around 7 mph early in the morning becoming light, then becoming southwest around 7 mph late in the afternoon. LAL.................1. Chc Wetting Rain....5%. Mixing Height.......3200-4200 ft agl. Transport Winds.....Southwest around 15 mph early in the morning becoming light, then becoming southwest around 15 mph in the afternoon. Ventilation.........Poor to good. Haines Index........2 to 3. TIME (PST) 4 AM 7 AM 10 AM 1 PM Sky (%).........58 63 68 68 Weather cov.....CHANCE CHANCE CHANCE CHANCE Weather type....RNSN RNSN RAIN RAIN Tstm cov........ CWR.............10 10 10 10 LAL.............1 1 1 1 Temp............37 36 40 43 RH..............81 85 76 63 20 FT wind......SW 7G10 SW 5 SW 6G10 SW 7G10 Mx ht msl (kft).0.8 1.4 2.7 4.4 Transport wind..SW 15 SW 5 SW 15 SW 15 Haines index....2 2 3 3 Vrate kt-ft/1K..9 8 30 67 Ventrate Cat....POOR POOR POOR GOOD $$ Forecaster...Lindaman Requested by...Brett Matthews Type of request...PRESCRIBED .TAG 2426038.3/REV .DELDT 11/12/24 .FormatterVersion 2.0.0 .EMAIL brett.matthews@usda.gov