Weather Alerts For Saint Helena, CA

URGENT - WEATHER MESSAGE National Weather Service San Francisco CA 1114 AM PST Sat Jan 10 2026 North Bay Interior Valleys-East Bay Interior Valleys-Santa Clara Valley Including San Jose-Eastern Santa Clara Hills-Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- 1114 AM PST Sat Jan 10 2026 ...COLD WEATHER ADVISORY IN EFFECT FROM 1 AM TO 9 AM PST SUNDAY... * WHAT...Cold conditions with temperatures in the low to mid 30s expected. * WHERE...The Santa Clara Valley and Eastern Hills, Most of San Benito County and the Cholame Hills in Southeast Monterey County, North Bay Interior Valleys, and East Bay Interior Valleys. * WHEN...From 1 AM to 9 AM PST Sunday. * IMPACTS...Cold conditions will be hazardous to sensitive populations such as unhoused individuals. Prolonged exposure to the cold conditions will lead to hypothermia for people, pets, and livestock. Cold conditions may damage or kill sensitive crops, plants, and vegetation if appropriate precautions are not taken. PRECAUTIONARY/PREPAREDNESS ACTIONS... Ensure portable heaters are working properly and are used correctly to avoid sparking a fire indoors. Do not use generators or grills inside as carbon monoxide poisoning can result. Check with your local, city, or county officials for information on available warming centers. Be sure to dress in layers if outdoors. Make sure that pets and livestock have adequate food, unfrozen water, and warmth. Cover or tend to sensitive crops, plants, and vegetation. &&