Area Forecast Discussion
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
774 FXUS66 KSTO 082049 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 1249 PM PST Sat Nov 8 2025 For additional details on weather and expected impacts over the next 7 days, please visit weather.gov/sto/briefing. .KEY MESSAGES... - A drying and warming trend continues into early next week, with patchy morning fog possible on Sunday. - The next storm system looks to arrive mid to late week bringing widespread rain, breezy winds, cooler temperatures, and mountain snow. .DISCUSSION... ...Today through early next week... Dry and warm conditions are expected through early next week, as ridging aloft builds in over the western CONUS. Temperatures will be in the low to mid 70s through early next week, with morning lows in the upper 40s to 50s. Breezy offshore and downsloping winds during the overnight hours are anticipated. Additional overnight and early morning fog development will be possible through the Delta, Valley, and foothills into Sunday morning before drying impacts from the building ridge lower chances early next week. Confidence is low on the coverage, density, and location of the fog, with current probabilities of visibility less than 1 mile around 20-45% across the Delta, southern/central Sacramento Valley, northern San Joaquin Valley and adjacent foothills locations on Sunday morning. ...Mid to Late Week... The aforementioned ridging aloft looks to break down by the middle of the week, allowing a deepening trough from the Gulf of Alaska to dig southward and introduce a return to active weather from late Wednesday onward. Widespread rain, breezy to gusty onshore winds, and isolated thunderstorm chances are expected on Thursday as this system moves into NorCal. As the trough moves inland by Friday, chances for scattered rain showers and isolated thunderstorms will continue, with mountain snow chances above 6500 feet expected to increase. Long range ensembles indicate some potential for an additional weaker system by next weekend, but details remain highly uncertain at this time. .AVIATION... Light winds prevail throughout the Valley across the forecast period, with breezy east-northeast winds anticipated along the Sierra after 03z Sunday. VFR conditions to prevail at RDD and RBL, with additional periods of MVFR/IFR/LIFR expected to develop 09z-18z Sunday in BR/FG through the Delta, foothills, and remaining Valley locations. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$