Weather Alerts For Mill Valley, CA

Flood Watch National Weather Service San Francisco CA 716 AM PST Thu Dec 25 2025 Marin Coastal Range-Sonoma Coastal Range-North Bay Interior Mountains-Coastal North Bay Including Point Reyes National Seashore-North Bay Interior Valleys- Including the cities of Sausalito, Santa Rosa, Tamalpais-Homestead, South Santa Rosa, Napa, Angwin, Woodacre, San Rafael, Petaluma, Rohnert Park, Lagunitas-Forest Knolls, and Novato 716 AM PST Thu Dec 25 2025 ...FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY EVENING... * WHAT...Flooding caused by excessive rainfall continues to be possible from multiple lines of showers and thunderstorms, strong at times, moving across the area. * WHERE...The Northern San Francisco Bay Area (Napa, Sonoma, and Marin counties). * WHEN...Through Friday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Low water crossings may become flooded. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Multiple rounds of moderate to heavy rainfall are expected across the North Bay through Friday evening. An additional 2-4" is possible over the North Bay Mountains and 1-3" over the North Bay Valleys by Friday. Nuisance flooding will increase through Friday with rises in smaller creeks and minor flooding along some of the mainstream rivers (Russian River, Napa River). Debris flows are possible particularly for the Pickett Burn Scar. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. &&

Closest strike: 24.85 miles Monitor Storms You are not at immediate risk, but frequently check WeatherBug to see if storms are moving towards you. Be aware that new storms can also form with little notice.

There is a Marginal Severe Storm Risk for your location. Continue reading for today's outlook from the National Weather Service's Storm Prediction Center. -------------------- National Severe Storm Outlook THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS MUCH OF COASTAL CALIFORNIA AND THE CENTRAL VALLEY SUMMARY An isolated risk for severe gusts/localized wind damage and perhaps a brief tornado will be possible today into this evening along much of the California Coast and portions of the Central Valley. 20z Update The previous outlook reasoning remains on track, and no changes were made with this update. A few thunderstorms had developed over the Sacramento Valley since 18z, where partial clearing was noted and weak buoyancy (200-300 J/kg) was present. Offshore, an increase in lightning was noted as the next upstream vorticity maximum moves towards the CA Coast. Although buoyancy will remain weak, stronger low/mid-level flow will become re-established later this afternoon/evening and will support an isolated risk of strong/severe wind gusts with a few stronger/sustained convective elements, and low-level hodographs will be sufficiently curved to conditionally support a brief tornado.