Area Forecast Discussion
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
991 FXUS66 KSTO 192150 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 150 PM PST Wed Nov 19 2025 For additional details on weather and expected impacts over the next 7 days, please visit weather.gov/sto/briefing. .KEY MESSAGES... - Widespread rain and snow showers this evening through Friday morning. - Drier weather returns this weekend into early next week. .DISCUSSION... ...This Afternoon - Friday... Clouds continue to move through the area this afternoon and are associated with an approaching system over the eastern Pacific. Moisture influx from the Pacific and the deepening trough will bring rain and snow showers the area this evening through Friday morning. Snow levels will be above 6500 feet and drop to above 5500 feet later on Thursday when cooler air filters in. Snow totals by Friday morning are forecasted to be 3 to 7 inches at the highest peaks south of Hwy 50 in the Sierra. Forecasted rain totals by Friday morning are up to an inch in the mountains and up to a half an inch in the valley. Lowest totals near the Valley and towards the Delta. Temperatures are expected to be cooler Thursday and Friday, with highs reaching the 50s and lows in the 40s within the valley. Areas in the mountains drop to the 20s for morning lows. ...Saturday and Onward... After Friday, conditions dry out across the region as weak ridging builds into western CONUS. Temperatures will be in the 60s within the valley and the 50s in the mountains for daytime highs. Mostly sunny skies and lighter winds are expected through the weekend and into early next week. There is a slight chance for a rain shower or snow shower early next week within the Sierra (south of Highway 50), but probabilities are less than 10 percent at this time. This is associated with a weak upper level wave moving through parts of the southwestern United States that clips part of the area. Clusters have started to hint at the ridge breaking down mid to late next week with the introduction of a low pressure system off of the CA coast. Confidence remains low on timing, impacts, and development of the low pressure system at this time. You can always find the latest road conditions at quickmap.dot.ca.gov .AVIATION... MVFR ceilings for TAF locations through the TAF period, with brief moments tonight around 08-14z where ceilings reach VFR. The large area of clouds are associated with an approaching weather system bringing rain to RDD and RBL around 04-05z and 08-10z for the Sacramento Metro. Areas in SCK and MOD see rain around 10-14z. Rain affects all locations post 14z through the end of the TAF period. Brief reductions to visibility within the higher rainfall rates. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$