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Coastal Flood Advisory Extended Through 9 PM Friday for North Bay Interior Valleys

The National Weather Service has extended the coastal flood advisory for North Bay Interior Valleys, now in effect until 9 PM PDT Friday.

4 reports on this incident · first at Sep 4, 2026, 2:27 a.m. ET

By AI ReporterWritten Sep 4, 2026, 2:53 a.m. ET
The has extended a for the North Bay Interior Valleys, now in effect from 4 PM to 9 PM PDT Friday, September 4, 2026. The was originally set to expire earlier, but the end time has been pushed back, according to the issued at 11:21 PM PDT Thursday. The covers Up to 0.7 feet of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. Minor flooding of lots, parks, and roads is expected, with only isolated road closures. Residents are advised to allow extra time if travel is required, as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take necessary actions to protect flood-prone property.

Earlier reports

  1. Sep 4, 2026, 2:36 a.m. ET

    Coastal Flood Advisory Issued for North Bay Interior Valleys Friday

    The National Weather Service in San Francisco has issued a Coastal Flood Advisory for the North Bay Interior Valleys, effective from 4 PM to 9 PM PDT on Friday, September 4, 2026. The advisory covers bayshore locations along the San Pablo Bay in Marin, Sonoma, and Napa counties.

    Up to 0.7 feet of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. Minor flooding of lots, parks, and roads is expected, with only isolated road closures anticipated.

    Officials advise that if travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth, and take necessary actions to protect flood-prone property.

  2. Sep 4, 2026, 2:32 a.m. ET

    Coastal Flood Advisory Issued for North Bay Interior Valleys Friday

    The National Weather Service San Francisco CA has issued a Coastal Flood Advisory for the North Bay Interior Valleys, in effect from 4 PM to 9 PM PDT Friday, September 4, 2026. The advisory covers bayshore locations along the San Pablo Bay in Marin, Sonoma, and Napa counties.

    Up to 0.7 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. Minor flooding of lots, parks, and roads is expected, with only isolated road closures. The advisory was issued at 11:21 PM PDT Thursday, September 3.

    Officials advise that if travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth, and take necessary actions to protect flood-prone property.

  3. Sep 4, 2026, 2:27 a.m. ETFirst report

    Coastal Flood Advisory Issued for North Bay Interior Valleys Friday

    The National Weather Service in San Francisco has issued a Coastal Flood Advisory for North Bay Interior Valleys, affecting bayshore locations along the San Pablo Bay in Marin, Sonoma, and Napa counties. The advisory is effective from 4 PM to 9 PM PDT on Friday, September 4, 2026. It was issued at 11:21 PM PDT on Thursday, September 3.

    According to the advisory, up to 0.7 feet of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. Minor flooding of lots, parks, and roads is expected, with only isolated road closures anticipated.

    Residents are advised that if travel is required, to allow extra time as some roads may be closed. Officials urge people not to drive around barricades or through water of unknown depth, and to take necessary actions to protect flood-prone property.

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Revision history

  1. Version 14 Sept 2026, 06:53current

    First published.

  2. Version 14 Sept 2026, 06:32current

    First published.

  3. Version 14 Sept 2026, 06:27current

    First published.

  4. Version 14 Sept 2026, 06:36current

    First published.

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