SAN FRANCISCO (CBS SF) — The National Weather Service issued a flood advisory for Marin and Sonoma Counties Saturday until 10:45 a.m. as a heavy band of rain moves through, swelling urban and small streams.

Cities affected included Corte Madera, Fairfax, Kentfield, Lakrspur, Lucas Valley-Marinwood, Mill Valley, Novato, San Anselmo, San Rafael, Sausalito, Strawberry, Tamalpais-Homestead Valley, Tamalpais-Homestead, Cotati, Petaluma, Rohnert Park, Roseland, Santa Rosa, Boyes Hot Springs, Sonoma, Kenwood, and Marin City.

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When rainfall reached half an inch per hour, sensors triggered the automated system to alert meteorologists.

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Street ponding and flooding will impact travel.

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Property damage is expected to be minimal, and the flooding is expected to quickly subside.