Area Forecast Discussion
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
561 FXUS66 KSTO 112110 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 110 PM PST Tue Nov 11 2025 For additional details on weather and expected impacts over the next 7 days, please visit weather.gov/sto/briefing. .KEY MESSAGES... - Dry and mild weather continues today with light winds - An atmospheric river storm system will bring widespread precipitation, gusty southerly winds, cooler temperatures, scattered thunderstorms and mountain snow Wednesday afternoon through Friday - Potential for some additional showers Sunday afternoon into early next week as a secondary system moves across the Pacific Northwest .DISCUSSION... ...Through Tonight... Current GOES-West visible satellite imagery shows some mid to high level clouds spreading inland across interior northern California on this Veteran`s Day afternoon. Mild and dry conditions will prevail across the region today as upper level ridging continues across much of the Western US. Light and variable winds are forecast across much of the area as well. High temperatures will range from the 60s to lower 70s in the mountains and low to mid 70s in the Valley, which is trending above normal for this time of year. Some patchy mist/fog may develop late tonight/early Wednesday morning as well before southerly winds increase ahead of an approaching storm system. ...Wednesday through Friday... Confidence is increasing on the atmospheric river storm system to bring widespread precipitation, isolated to scattered thunderstorms, gusty southerly winds, moderate mountain snow and cooler temperatures to the forecast area late Wednesday through Friday. The latest guidance shows some scattered showers ahead of the main band on Wednesday afternoon with the front moving through Wednesday night into Thursday. WPC Guidance shows the latest precipitation totals to be around 1-2 inches in the Valley and 1.5-3 inches in the foothills and mountains. Snow levels have trended higher with the most recent forecast, and the Winter Storm Watch has been upgraded to a Winter Weather Advisory above 6500 feet from 1 AM Thursday to 4 AM Friday. Gusty southerly winds will also develop with this storm system, and a Wind Advisory has been issued for the Valley, Delta and Northeast Foothills from 10 PM Wednesday through 1 PM Thursday. Isolated to scattered thunderstorms may also develop Wednesday night through Thursday evening, with generally a 10-20 percent chance being advertised by the NBM. Be sure to plan ahead for the pattern change and check back frequently for updates on the latest forecast! ...Weekend through Early Next Week... There is potential for another round of showers in the forecast for late this weekend into early next week from a secondary system moving across the Pacific Northwest. Minimal impacts are expected from this at this time as precipitation amounts appear to be relatively light, however there could be some minor snow accumulations in the mountains of 1-2 inches and then slick roads elsewhere from rain. .AVIATION... General VFR conditions prevail across interior northern California over the next 24 hours, with the exception of patchy MVFR/IFR/LIFR conditions in the Valley and Delta from 11Z to 17Z Wednesday in BF/FG. Light and variable winds are forecast at TAF sites through 12Z-15Z Wednesday before southerly winds begin to increase ahead of an approaching storm system. && .STO WATCHES/WARNINGS/ADVISORIES... Wind Advisory from 10 PM Wednesday to 1 PM PST Thursday for Carquinez Strait and Delta-Central Sacramento Valley-Northeast Foothills/Sacramento Valley-Northern Sacramento Valley-Northern San Joaquin Valley-Southern Sacramento Valley. Winter Weather Advisory from 1 AM Thursday to 4 AM PST Friday for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park. && $$