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Halloween Weather: Rain, Thunderstorms & Cooler Temperatures Likely Friday

SAN FRANCISCO (CBS SF) -- Grab that umbrella and jacket -- it's going to be a cold and wet Halloween around the San Francisco Bay Area.

A cold front heading south from the Gulf of Alaska is expected to reach the North Bay by early Friday morning, with a lower chance of showers inland and in the South Bay, according to the National Weather Service.

The wettest weather is predicted during the Friday morning and afternoon, with widespread rainfall and a possibility of isolated thunderstorms expected throughout the Bay Area, according to KPIX 5 meteorologist Lawrence Karnow.

While it won't be a complete washout, trick-or-treaters can expect a few showers Friday night. Rain is likely to taper off by Saturday morning.

The North Bay and Santa Cruz mountains will likely see the most rainfall, with totals of up to 1.5 inches expected, according to the weather service. San Francisco has only seen rain on Oct. 31 about 12 percent of the time since the 1840s.

Temperatures are expected to be 10 to 20 degrees cooler on Friday.

Get real-time local forecasts from our KPIX 5 meteorologists by downloading the CBS SF Bay Area weather app for Apple and Android devices.


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