PIG IN BOOTS2.jpgThe fall season’s first big rainstorm touched down late Saturday night, and is expected to pour all day Sunday, according to the National Weather Service.

About an inch of rain should fall between Saturday and Sunday, with high-pressure southerly winds pushing through the outer parts of the Bay Area, National Weather Service Meteorologist Austin Cross said.

“It’s the first major one compared to the last few little ones we’ve had,” Cross said.

Winds should decrease by the afternoon on Sunday, with the final rainstorm clearing up by Monday, Cross said.

Counties affected by the storm include San Francisco, Santa Cruz, San Mateo, Marin, Contra Costa, Napa, Sonoma, Santa Clara, and Alameda.

Cross said given that it’s the first big storm, clean gutters could go a long way to preventing problems among residents.

“If there are a lot of debris in storm drains, there could be some urban flooding,” he said.

In outer Bay Area counties where strong winds are prevalent, residents should make sure light objects are placed indoors so they don’t fly away, Cross said.

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