703 FNUS76 KSTO 011118 FWSSTO Spot Forecast for Big Hill 69...USFS National Weather Service Sacramento CA 418 AM PDT Wed Oct 1 2025 Forecast is based on ignition time of 0601 PDT on October 01. If conditions become unrepresentative...contact the National Weather Service. .DISCUSSION... A weather system continues to impact the area into midweek, bringing wetting rains and isolated thunderstorms at the burn site through Friday. Best chances of thunderstorms will be on Thursday, although confidence on development of thunderstorms remains low. Cool high temperatures for the next few days at the burn site as well, with highs in the upper 40s to low 50s; cooler at the higher elevations. Breezy winds will be a concern for the next few days as the weather system pushes through and out of the area by Friday. .REST OF TODAY... Sky/weather.........Partly sunny. Slight chance of rain showers early in the morning, then chance of rain showers. Max temperature.....46-50. Min humidity........87-91 percent. Wind (20 ft)........ Slope/valley.......South winds 5 to 14 mph. Ridgetop...........South 15 to 21 mph. Mixing height.......1100 ft AGL. Transport winds.....South 15 to 21 mph. CWR.................33 percent. Chance of thunder...6 percent. TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky cover.......MC MC MC MC MC MC MC MC MC MC MC MC CWR.............30 30 30 30 30 30 30 30 30 30 30 30 Chc of thdr (%).0 0 0 0 0 10 10 10 0 0 0 10 Temp............43 44 43 43 43 44 45 46 46 46 47 45 RH..............82 86 92 96 100 99 100 100 100 97 97 96 SL/VL wind dir..S S S S S S S S S SW SW SW SL/VL wind spd..14 14 13 13 12 10 10 10 10 10 10 10 SL/VL wind gust.18 18 18 20 20 18 20 20 20 20 20 18 Ridge wind dir..S S S S S S S S S S S S Ridge wind spd..15 15 16 16 16 18 18 18 21 21 21 17 Mix hgt (kft)...0.1 0.1 0.3 0.3 0.3 0.8 0.8 0.8 1.1 1.1 1.1 0.8 Transp wind dir.S S S S S S S S S S S S Transp wind spd.15 15 16 16 16 18 18 18 21 21 21 17 .TONIGHT... Sky/weather.........Mostly cloudy. Chance of rain showers. Min temperature.....41-45. Max humidity........98-100 percent. Wind (20 ft)........ Slope/valley.......Southwest winds 5 to 13 mph. Ridgetop...........South 12 to 17 mph. Mixing height.......0 ft AGL. Transport winds.....South 12 to 17 mph. CWR.................39 percent. Chance of thunder...8 percent. TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky cover.......MC MC MC MC MC MC MC MC MC MC MC MC CWR.............30 30 30 30 30 40 40 40 40 40 40 40 Chc of thdr (%).10 10 10 10 10 10 10 10 10 10 10 0 Temp............44 44 43 43 45 46 47 47 48 47 48 47 RH..............100 100 100 99 91 88 88 86 83 85 83 85 SL/VL wind dir..SW SW SW S SW SW SW SW SW SW SW SW SL/VL wind spd..10 10 10 10 12 13 13 13 12 10 10 9 SL/VL wind gust.17 17 16 17 18 20 18 18 16 15 15 15 Ridge wind dir..S S S S S S S S SW SW SW SW Ridge wind spd..17 17 12 12 12 13 13 13 15 15 15 14 Mix hgt (kft)...0.8 0.8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Transp wind dir.S S S S S S S S SW SW SW SW Transp wind spd.17 17 12 12 12 13 13 13 15 15 15 14 .THURSDAY... Sky/weather.........Mostly cloudy. Chance of rain showers. Max temperature.....46-50. Min humidity........85-89 percent. Wind (20 ft)........ Slope/valley.......Southwest winds 5 to 10 mph. Ridgetop...........Southwest 12 to 15 mph. Mixing height.......1400 ft AGL. Transport winds.....Southwest 12 to 15 mph. CWR.................37 percent decreasing to 22 percent late in the morning. Chance of thunder...14 percent. TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky cover.......MC MC MC MC MC MC MC MC MC MC MC MC CWR.............40 40 40 40 40 20 20 20 20 20 20 10 Chc of thdr (%).0 0 0 0 0 10 10 10 10 10 10 10 Temp............47 45 43 44 44 44 45 46 46 46 45 44 RH..............82 90 97 97 97 97 95 93 92 92 93 94 SL/VL wind dir..SW SW S S S S S S SW SW SW SW SL/VL wind spd..9 9 10 10 10 9 9 9 8 8 8 7 SL/VL wind gust.15 15 15 15 15 16 16 16 16 16 16 14 Ridge wind dir..SW SW SW SW SW SW SW SW SW SW SW SW Ridge wind spd..14 14 12 12 12 15 15 15 13 13 13 15 Mix hgt (kft)...0.1 0.1 0.4 0.4 0.4 0.5 0.5 0.5 1.1 1.1 1.1 1.4 Transp wind dir.SW SW SW SW SW SW SW SW SW SW SW SW Transp wind spd.14 14 12 12 12 15 15 15 13 13 13 15 .OUTLOOK FOR WEDNESDAY OCTOBER 08 THROUGH TUESDAY OCTOBER 14... Climate Prediction Center guidance shows near-normal high temperatures and normal precipitation for the next 7-10 days. Long range models forecasting an offshore trough around October 8/9, which would help lower temperatures and possibly bring higher elevation precipitation chances, however it is still too early to know exact details. $$ Forecaster...JW Requested by...Chris Enriquez Type of request...PRESCRIBED .TAG 2522031.7/STO .DELDT 10/01/25 .FormatterVersion 2.0.0 .EMAIL Christian.enriquez@usda.gov