A rainy week in San Francisco is expected to transition into a wet Halloween weekend, with forecasters predicting that the entire Bay Area will experience some lingering showers through Saturday.

On Saturday night, a new storm system will drop rain over the North Bay and spread over the Bay Area the next morning, according to the National Weather Service.

“A thunderstorm or two will also be possible throughout the day, primarily over the North Bay,” forecasters said in an email.

There’s also a chancer that the North Bay could experience a wet Halloween evening Monday.