Widespread Rain, King Tides Ahead For The Bay Area: Forecast

SAN FRANCISCO — An incoming weather system is forecast to dump up to an inch of rain over parts of the Bay Area this week, and king tides may contribute to coastal flooding at times through Sunday.

A coastal flood advisory and high surf advisory will take effect Thursday morning and remain in place until the weekend, according to the National Weather Service. Forecasters said minor road ponding may occur during the heaviest rainfall, and high tides could impact flood-prone areas, including along the Embarcadero and at the Manzanita Park-and-Ride in Marin County.

In the high surf advisory, forecasters said to expect breaking waves of 12 to 15 feet, and even higher along steep, northwest-facing beaches.

On the precipitation front, the weather service forecasts "mostly beneficial rain" of up to an inch in the North Bay and a quarter-inch elsewhere in the Bay Area. The heaviest rainfall was forecast for Wednesday afternoon, with widespread showers continuing Thursday and a drizzle lingering into Friday.

According to the weather service, a deepening low-pressure system will also pull in colder air overnight, knocking several degrees off afternoon highs and overnight lows Thursday and Friday.

Forecasters said another round of light rain would be in the cards late Sunday into early Monday before a ridge of high pressure heralds the return of warmer, seasonable weather by the middle of next week.