SAN FRANCISCO (CBS SF) — The wind started howling in many parts of the Bay Area early Monday afternoon as a wind advisory for most of the region went into effect, according to forecasters.

Onshore flow was creating the windy conditions that were also contributing to lower temperatures across the Bay Area and on the Central Coast, which was included in the advisory announced Sunday.

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Initially impacted areas included the Golden Gate, the Marin Headlands and anywhere near the coast. The advisory issued by the Bay Area office of the National Weather Service went into effect at noon and remains in place until 8 p.m. Monday night.

Early Monday evening, KPIX viewer Tom Pico sent the newsroom a photo of a tree that had fallen on Railroad Avenue in Pleasanton that appeared to have come down at least partially on a vehicle.

Fallen tree in Pleasanton (credit: Tom Pico)

Gusts up to 40 mph are forecast along the coast including San Francisco, the San Mateo coastline and other areas on the water. The inland valleys of Contra Costa and Alameda counties will see gusts to 35 miles an hour as the afternoon progresses.

The Bay Area National Weather Service Twitter account posted that gusts up to 55 mph were possible in some gaps and passes.

KPIX Reporter Juliette Goodrich posted video on Twitter that showed how strong the winds were already kicking up shortly before 1 p.m.

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The National Weather Service Bay Area Twitter account later posted that gusts up to 50 mph were measured in Sausalito, while San Francisco had peak gusts of 35 mph.

The San Francisco Recreation and Park Department announced that Stern Grove would be closed due to the high winds Monday afternoon.

While the winds were dying down somewhat by early Monday evening, there were still some strong gusts being reported.

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Overnight lows are expected to be in the 40s and 50s. Similar temperatures and winds are expected to continue through Wednesday.