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Weather alerts
Coastal Flood Advisory
Coastal Flood Advisory issued October 31 at 4:45AM PDT until November 1 at 6:00PM PST by NWS San Francisco CA
Alert details
Area: San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast
* WHAT...Up to 1.5 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...Bayshore locations along the San Francisco Bay, San Pablo Bay, and Monterey Bay. * WHEN...Until 6 PM PDT Sunday. * IMPACTS...High tides will result in flooding of low-lying infrastructure, isolated road closures, and coastal erosion. Rising tides will bring water and waves farther up the beach than normal, restricting escape from beaches and coastal areas. More substantial impacts are expected along bayshore Marin County where increased flooding is anticipated across low lying areas. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be 1.5 feet above normal (7.3 ft MLLW) at 03:44 PM on Saturday 10/31 and 1.0 ft above normal (6.8 ft MLLW) on Sunday 11/01 at 3:59 PM. These predictions include up to 1.5 ft of surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.
Recommended action: 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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Chance of precipitation
Details
This Afternoon: Mostly Sunny
Tomorrow: Sunny
Monday: Partly Sunny
Source: National Weather Service. This is the chance of measurable precipitation, including rain or frozen precipitation; it is not a snow-only or rain-only percentage. Forecast probability is separate from measured precipitation.
Normal
Valid Oct 27, 2026
U.S. Drought Monitor for this station locale. Updated weekly.
Chance of precipitation
Details
This Afternoon: Mostly Sunny
Tomorrow: Sunny
Monday: Partly Sunny
Source: National Weather Service. This is the chance of measurable precipitation, including rain or frozen precipitation; it is not a snow-only or rain-only percentage. Forecast probability is separate from measured precipitation.
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