Weather Alerts For Hayward, CA

Flood Watch National Weather Service San Francisco CA 716 AM PST Thu Dec 25 2025 San Francisco-San Francisco Bay Shoreline-San Francisco Peninsula Coast-East Bay Interior Valleys-Santa Cruz Mountains-Santa Clara Valley Including San Jose-Eastern Santa Clara Hills-East Bay Hills-Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest-Mountains of San Benito County And Interior Monterey County including Pinnacles National Park-Northern Salinas Valley/Hollister Valley and Carmel Valley-Northern Monterey Bay-Southern Monterey Bay and Big Sur Coast- Including the cities of Day Valley, Scotts Valley, Seaside, Greenfield, Watsonville, King City, San Jose, Oakland, Concord, Marina, Daly City, Blackhawk, Walnut Creek, Berkeley, Pleasanton, Pacifica, San Ramon, Live Oak, Monterey, Antioch, Fremont, San Francisco, Salinas, Santa Cruz, Boulder Creek, Livermore, Hayward, Cordoza Ridge, and Pittsburg 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...San Francisco County, San Mateo Peninsula, East Bay, South Bay, and Central Coast * 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... - Numerous lines of showers and thunderstorms will move across the Bay Area and Central Coast through Friday evening. An additional 1-2" of rain is expected across the interior with locally higher totals between 2-3" across the Santa Cruz Mountains and up to 3" across the Santa Lucia Range. Flooding potential will increase with each successive round of rain. Sharp rises in smaller creeks and streams are expected with at least some potential for minor flooding in mainstream rivers. - 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. &&

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 ALONG MUCH OF THE CALIFORNIA COAST AND INTO THE CENTRAL AND NORTHERN VALLEYS SUMMARY The risk for isolated severe thunderstorms will persist this evening and into tonight across much of the California Coast and portions of the Central and Northern Valleys. Coastal CA into the Central and Northern Valleys Scattered showers and thunderstorms persist this evening from the Sacramento Valley toward the central coastline, with another area over southern CA. Areas of heating have led to a few stronger cells around the Sacramento area, with indications of marginal hail. To the west, another frontal band of convection will continue to approach much of the central coastal counties. The 00Z OAK sounding shows steep lapse rates and strong shear profiles, which may favor both damaging gusts or embedded areas of rotation as leading cells and/or the frontal band approach later this evening. As such, will maintain the Marginal Risk. For more information, see mesoscale discussion 2272.