San Francisco Bay Area, CA — A coastal flood advisory is now in effect for the North Bay Interior Valleys and the San Francisco Bay shoreline, as higher-than-normal tides combined with storm surge raise the risk of minor coastal flooding through the weekend, according to forecasters.
The advisory was issued Wednesday evening by the National Weather Service office in San Francisco and remains valid from 6 a.m. Thursday through noon Sunday. Officials warn that low-lying shoreline areas and tidal waterways are most vulnerable during peak high tides.
Minor flooding possible in low-lying coastal areas
Forecasters say up to 1.4 feet of inundation above ground level is possible in flood-prone locations near the Bay, including shoreline roads, parks, parking lots, and areas adjacent to tidal creeks.
“Flooding of lots, parks, and roads with only isolated road closures is expected,” the National Weather Service said.
While widespread closures are not anticipated, officials caution that localized flooding may disrupt travel, particularly during morning high tide cycles.
High tide schedule raises concern through the weekend
According to tide forecasts at the San Francisco tidal gauge, elevated water levels are expected during the following times:
- Thursday (Jan. 29): 7:34 a.m. — 1.2 feet above normal (7.02 ft MLLW)
- Friday (Jan. 30): 8:34 a.m. — 1.1 feet above normal (6.98 ft MLLW)
- Saturday (Jan. 31): 9:30 a.m. — 1.4 feet above normal (7.24 ft MLLW)
- Sunday (Feb. 1): 10:22 a.m. — 1.3 feet above normal (7.16 ft MLLW)
Forecasters noted that these projections include up to 0.4 feet of storm surge, which is enhancing astronomical tides and increasing flood potential. High tide timing may vary by up to 90 minutes across the Pacific Coast and throughout the Bay.
Travel disruptions possible near shorelines
Drivers traveling near coastal roads are urged to plan for extra time, particularly during morning hours when tides are highest.
“Do not drive around barricades or through water of unknown depth,” the NWS warned.
Even shallow flooding can conceal roadway damage or debris, creating hazardous driving conditions.
Safety guidance for residents and campers
The National Weather Service is urging people in flood-prone or low-lying areas to take precautions now, especially residents near shorelines and tidal waterways.
Key safety recommendations include:
- Seek higher ground immediately if flooding develops
- Follow evacuation instructions without delay
- Disconnect utilities and appliances if time permits
- Avoid basements or rooms with submerged electrical outlets
“If you see sparks or hear buzzing, crackling, or popping sounds, evacuate immediately,” officials said.
People are also advised to avoid walking through floodwaters, noting that as little as six inches of moving water can knock a person off their feet.
Driving during heavy rain and flooding
Officials also emphasized safe driving practices during periods of heavy rain, which can worsen flooding conditions.
According to the National Weather Service:
- Never attempt to drive through flooded roads
- Just 12 inches of rushing water can sweep away most vehicles
Recommended rain-driving tips include:
- Use headlights, even during daylight hours
- Stay in middle lanes and on higher ground
- Avoid puddles, which can cause hydroplaning
- Give extra space to large vehicles, which can reduce visibility
- Turn around when encountering flooded roads
“Driving through floodwater can also damage a vehicle’s electrical and mechanical systems,” the agency warned.
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Advisory remains in effect through Sunday
The coastal flood advisory will remain active until noon Sunday, with officials continuing to monitor tide levels and any additional storm impacts that could worsen flooding.
Residents and visitors along the San Francisco Bay shoreline and North Bay Interior Valleys are encouraged to stay alert, monitor local updates, and take precautions during high tide periods throughout the weekend.
Have you noticed higher tides or minor flooding in your area already? Share what conditions look like where you live in the comments below.
