Coastal flood advisory in place for Northern California from Saturday to Tuesday
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The NWS San Francisco CA issued a coastal flood advisory at 11:55 a.m. on Friday valid from Saturday 7 p.m. until Tuesday 3 a.m. The advisory is for Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Big Sur.
"Up to 2.0 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways," can be expected according to the NWS. "At the San Francisco tidal gauge, high tide is expected to be 1.9 ft above normal (7.8 ft MLLW) at 10:20 p.m. on Saturday the 13th, 2.0 ft above normal (7.8 ft MLLW) at 11:10 p.m. on Sunday the 14th, 1.9 ft above normal (7.8 ft MLLW) at 12:02 a.m. on Tuesday the 16th. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively."
"High tide flooding of lots, parks, and roads with only isolated road closures expected. Dangerous swimming and surfing conditions and localized beach erosion can be expected. Sneaker waves can sweep across the shoreline without warning, pulling people into the sea from rocks, jetties and beaches," comments the NWS. "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. Stay off of jetties, piers, rocks, and other waterside infrastructure. Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean."
This advisory is in effect until Tuesday at 3 a.m.
Protect yourself during a flood with these tips from the NWS
If you live in a flood-prone area or are camping in a low-lying area, get to higher ground immediately. If told to evacuate, do so immediately. Lock your home when you leave. If you have time, disconnect utilities and appliances. Don't go into a basement, or any room, if water covers the electrical outlets or if cords are submerged. If you see sparks or hear buzzing, crackling, snapping, or popping noises, get out. Stay out of water that may have electricity in it. Don't walk through flood waters. It only takes 6 inches of moving water to knock you off your feet. If you are trapped by moving water, move to the highest possible point and call 911 if possible.
During periods of intense rainfall, the risk of flooding increases, particularly in low-lying and flood-prone areas. It is imperative to avoid driving through any water on the road, even if it seems shallow. According to the NWS, most cars can be swept away by just 12 inches of rushing water.
What to do in the rain on the road?
- Turn on headlights - Even in daylight, using headlights can help improve visibility and let other drivers know where you are.
- While on the road - Opt for the middle lanes and remain on higher ground. Rainwater tends to gather along the road edges.
- Steer clear of puddles - Driving into puddles or low areas of rainwater can cause vehicles to hydroplane or skid out of control.
- Give ample space to large vehicles - Trucks or buses can create a water spray that diminishes visibility.
- Avoid flooded zones - If you encounter a flooded road, make a U-turn and go back. The powerful currents of flash floods can carry drivers off the road. Driving through deep water can also damage a vehicle's mechanical and electrical systems.
What is hydroplaning?
Hydroplaning is the term for when a vehicle begins sliding uncontrollably on wet roads.
This happens when water in front of the tire builds up faster than the vehicle's weight can push water out of the way. The water pressure then causes the vehicle to rise and slide on a thin layer of water between the tires and the road, making the driver lose control. Hydroplaning is most commonly attributed to three factors:
- Vehicle speed - When a vehicle's speed increases, the tire-traction grip and ability to control the vehicle decreases. Drive at a reduced speed during wet weather.
- Water depth - The deeper the water, the sooner a vehicle loses traction on the road. It doesn't matter how deep the water is, even a thin layer can lead to hydroplaning.
- Tire tread depth - Checking your tire tread before hitting the road is important, as low or no tread can lead to sliding.
In the event of your vehicle hydroplaning, here's what to know:
- Ease off the accelerator - Step off the gas to slow down the vehicle until the tires find traction.
- Turn into the skid - Turning into the skid can help the vehicle's tires realign to regain control.
- Make sure the tires reconnect with the road - During the skid, wait until the tires reconnect with the road and then gently straighten the wheels to regain control.
- Brake gently as needed - Brake normally if the vehicle has anti-lock brakes and pump brakes gently if in an older vehicle.
Source: The National Weather Service
United Robots California
This story was originally published June 12, 2026 at 12:01 PM.