Rain returning to Bay Area after dry start to December; coastal flood advisory issued

By: Eliot Pierce

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The Bay Area is seeing a wet weather pattern Wednesday after a dry start to December, with the potential for localized flooding in the days ahead.

The National Weather Service has issued a coastal flood alert for the San Francisco Bay and San Pablo Bay shorelines from 6 a.m. Thursday through 1 p.m. Monday in advance of the storms.

Higher astronomical tides are predicted to cause modest coastal flooding, prompting the issuance of a Coastal Flood Advisory.#twitter.com/pC6uzhwbO0 #CAwxpic

The first weather system is expected to arrive Wednesday evening, beginning in the North Bay, according to the Weather Service. Overnight rain is expected to be the most strong, with lingering showers possible on Thursday.

The first system is expected to provide 0.5 to 1 inch of rain to areas in the North Bay, with higher elevations potentially seeing localized totals of 1.5 inches. The remainder of the Bay Area might receive 0.25 to 0.75 inches in the meanwhile.

Late Friday and early Saturday are predicted to see the arrival of a more powerful low pressure system in the Bay Area. Stronger winds, with gusts of up to 40–50 mph on the coast and at higher elevations, are predicted along with more severe rain.

Given that king tides and heavy waves are also anticipated this weekend, the second system is increasing the risk of localized flooding.

The second system is predicted to bring the most rainfall to the North Bay, with 1-3 inches predicted, and potentially more at higher elevations. In the meantime, the rest of the Bay Area is predicted to receive 0.5 to 1 inch.

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Forecasters warned Monday could see rain return after Sunday’s respite.

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