Area Forecast Discussion
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
908 FXUS66 KSTO 022054 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 154 PM PDT Tue Sep 2 2025 For additional details on weather and expected impacts over the next 7 days, please visit weather.gov/sto/briefing. .DISCUSSION... .SYNOPSIS... A progressive weather system brings thunderstorm chances today through Thursday, as temperatures trend more seasonable from midweek onward. && .KEY MESSAGES... * Today - Thursday: - Weather system continues to track northward along the California coast today and Wednesday, bringing a gradual cool down and the return of periodically breezy onshore winds. - Slight (10-30%) chance of afternoon/evening isolated thunderstorms as the system moves through. - Lingering chances (10-25%) for afternoon/evening isolated thunderstorms on Thursday - Highest chances for thunderstorms occur today across the Sierra and southern Cascades. * Friday - Monday: - Broad troughing aloft expected to remain in place through early next week with slight variations in location and orientation. - Seasonable to slightly below normal temperatures forecast across interior NorCal by next weekend as breezy onshore flow persists. .Changes from previous forecast... - Slight increase in thunderstorm potential for Thursday afternoon and evening && .AVIATION... VFR conditions are expected over the next 24 hours. Winds will be generally 10kt or less, except near the Delta with winds up to 12 kt and gusts up to 15-25 kt into 18z Wed. High clouds will continue to lift north and east today with relatively clear skies returning by 14z Wed. Chances for local MVFR/IFR conditions from thunderstorms over the Sierra and Southern Cascades in the afternoon and evening until 09z Wed. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$