SAN FRANCISCO, Calif. – A slow-moving Pacific storm system could bring heavy rainfall and a small but notable flash flood threat to parts of the Bay Area and Central Coast early next week. The National Weather Service said Friday that a Marginal Risk—the first level on the excessive rainfall scale—has been issued for Monday and Tuesday, meaning at least a 5% chance of rainfall intense enough to trigger localized flooding.
According to the Weather Prediction Center and the NWS San Francisco Bay Area office, the risk zone includes San Francisco, Oakland, San Jose, Santa Rosa, Monterey, and the Highway 1 corridor through Big Sur. Periods of moderate to heavy rain are expected to develop late Sunday night and persist through Tuesday morning, with urban and small stream flooding possible in low-lying and poorly drained areas.
Transportation officials urge caution for commuters along I-280, US-101, and Highway 17, where slick roads and ponding could cause slowdowns or minor accidents. Residents in burn scar regions should remain alert for debris flow potential if heavier bands set up inland…