UPDATE: Tornado Warning Expires; No Damage Reported

Update, 11:50am-- A tornado warning for San Mateo County issued by the National Weather Service expired at 11:30 a.m. with no report of damage, a meteorologist with the weather service said late this morning.

The warning was issued at about 11 a.m. for most of the county as the weather service's radar system picked up signs of a severe thunderstorm and possible tornado approaching the coast, meteorologist Steve Anderson said.

Winds of 30 to 40 mph, a downpour of rain, and pea-sized hail were reported, but not a tornado, Anderson said.

The heavy part of the storm has passed through the Peninsula, and "once it got over the Bay, it decreased in intensity rapidly," he said.

The storm was moving through Alameda and Contra Costa counties as
of 11:40 a.m., he said.

-Bay City News

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The National Weather Service issued a tornado warning this morning for San Mateo County due to a severe thunderstorm in the area.

The warning does not single out South San Francisco; it is for the cities of San Mateo, San Carlos, Redwood City, Millbrae, Foster City, Burlingame, Belmont, Hillsborough and Half Moon Bay, according to the weather service.

The weather service issued the warning at 10:58 a.m. and it is expected to last until at least 11:30 a.m.

People caught outside should seek shelter in a nearby reinforced building, or at last resort, seek shelter in a culvert.

-Bay City News