Rain looks likely on Halloween

Bay Area trick-or-treaters and Halloween revelers may need to add an umbrella to their costumes this Friday as forecasters predict wet weather throughout the region.

National Weather Service meteorologists say rain and scattered showers are likely during the day Friday and on Halloween night throughout most of the Bay Area.

A cold front heading south from the Gulf of Alaska is expected to reach the North Bay by late Thursday night, with a lower chance of showers inland and in the South Bay, according to the weather service.

The wettest weather is predicted on Friday morning and afternoon, with widespread rainfall throughout the Bay Area that will likely taper off into scattered showers on Friday night, National Weather Service meteorologist Charles Bell said:

“If people have plans Friday evening, definitely stay up to date with the latest forecast.”

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. Thunderstorms are also possible throughout the Bay Area on Friday night, according to forecasters.

Bell said this year’s Halloween forecast is fairly unusual for the Bay Area, where it typically doesn’t rain on the holiday. San Francisco has only seen rain on Oct. 31 about 12 percent of the time since the 1840s, the meteorologist said.