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NOAA's National Weather Service
Each location shows all alerts on one page
WARNINGS - WATCHES - ADVISORIES - STATEMENTS
Updates every 15 Minutes
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| Los Angeles County | ||
| Effective: Mon, 12/29 2:38am | Severity: Minor | |
| Updated: December 29, 2025 11:45 am | Urgency: Expected | |
| Expires: Mon, 12/29 3:00pm | Certainty: Likely | |
| Areas Affected: San Francisco - Coastal North Bay Including Point Reyes National Seashore - North Bay Interior Valleys - San Francisco Bay Shoreline - San Francisco Peninsula Coast - Northern Monterey Bay - Southern Monterey Bay and Big Sur Coast | ||
Alert
Details:
* WHAT...Up to 1.3 ft of inundation above ground level is possible in low lying areas near shorelines and tidal waterways. * WHERE...Bayshore locations along San Francisco and Monterey Bay. * WHEN...From 5 AM Wednesday to 2 PM PST Sunday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...The San Francisco tidal gauge high tide is expected to be 1.02 ft above normal (6.86 ft MLLW) at 7:51 AM Wednesday, 1.21 ft above normal (7.05 ft MLLW) at 8:41 AM Thursday, 1.32 ft above normal (7.16 ft MLLW) at 9:34 AM Friday, 1.29 ft above normal (7.13 ft MLLW) at 10:26 AM Saturday, and 1.08 ft above normal (6.92 ft MLLW) at 11:18 AM Sunday. High tide timing varies up to 90 minutes earlier or later along the Pacific Coast and throughout the San Francisco Bay respectively. There is a chance these higher tides coincide with storm surge during an active weather period, so actual tidal levels may be slightly higher than forecast. Information: If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. |
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| Marin County | ||
| Effective: Mon, 12/29 2:38am | Severity: Minor | |
| Updated: December 29, 2025 11:45 am | Urgency: Expected | |
| Expires: Mon, 12/29 3:00pm | Certainty: Likely | |
| Areas Affected: San Francisco - Coastal North Bay Including Point Reyes National Seashore - North Bay Interior Valleys - San Francisco Bay Shoreline - San Francisco Peninsula Coast - Northern Monterey Bay - Southern Monterey Bay and Big Sur Coast | ||
Alert
Details:
* WHAT...Up to 1.3 ft of inundation above ground level is possible in low lying areas near shorelines and tidal waterways. * WHERE...Bayshore locations along San Francisco and Monterey Bay. * WHEN...From 5 AM Wednesday to 2 PM PST Sunday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...The San Francisco tidal gauge high tide is expected to be 1.02 ft above normal (6.86 ft MLLW) at 7:51 AM Wednesday, 1.21 ft above normal (7.05 ft MLLW) at 8:41 AM Thursday, 1.32 ft above normal (7.16 ft MLLW) at 9:34 AM Friday, 1.29 ft above normal (7.13 ft MLLW) at 10:26 AM Saturday, and 1.08 ft above normal (6.92 ft MLLW) at 11:18 AM Sunday. High tide timing varies up to 90 minutes earlier or later along the Pacific Coast and throughout the San Francisco Bay respectively. There is a chance these higher tides coincide with storm surge during an active weather period, so actual tidal levels may be slightly higher than forecast. Information: If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. |
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| Los Angeles County | ||
| Effective: Mon, 12/29 11:36am | Severity: Moderate | |
| Updated: December 29, 2025 11:45 am | Urgency: Expected | |
| Expires: Mon, 12/29 9:00pm | Certainty: Likely | |
| Areas Affected: North Bay Interior Mountains - North Bay Interior Valleys - East Bay Interior Valleys - 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 | ||
Alert
Details:
* WHAT...Cold conditions with temperatures as low as 33 expected. * WHERE...The East Bay Hills and Valleys, Interior Monterey County and the Santa Lucia Range, Most of San Benito County and the Cholame Hills in Southeast Monterey County, North Bay Interior Mountains, North Bay Interior Valleys, Eastern Santa Clara Hills, and Southern Salinas Valley/Arroyo Seco and Lake San Antonio. * WHEN...From 1 AM to 9 AM PST Tuesday. * 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. Information: 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. |
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| Marin County | ||
| Effective: Mon, 12/29 11:36am | Severity: Moderate | |
| Updated: December 29, 2025 11:45 am | Urgency: Expected | |
| Expires: Mon, 12/29 9:00pm | Certainty: Likely | |
| Areas Affected: North Bay Interior Mountains - North Bay Interior Valleys - East Bay Interior Valleys - 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 | ||
Alert
Details:
* WHAT...Cold conditions with temperatures as low as 33 expected. * WHERE...The East Bay Hills and Valleys, Interior Monterey County and the Santa Lucia Range, Most of San Benito County and the Cholame Hills in Southeast Monterey County, North Bay Interior Mountains, North Bay Interior Valleys, Eastern Santa Clara Hills, and Southern Salinas Valley/Arroyo Seco and Lake San Antonio. * WHEN...From 1 AM to 9 AM PST Tuesday. * 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. Information: 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. |
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