'Hazardous Weather' Likely Through Sunday

(This story was updated at 3:00 pm to reflect a lessened forecast of storm-related wind and flooding.)

Keep your umbrella handy and your eyes on the road.

The National Weather Service has issued a hazardous weather warning for Tuesday through Sunday.

The weather front should lighten up a bit on Wednesday but forecasters predict it will return through the end of the week.

"Thunderstorms with small hail are possible over the weekend," according to the forecast, which added that "rain could be heavy at times and lead to poor driving conditions."

Already the storms were having an effect.

The San Jose Mercury reported that two cars collided on Interstate 580 near Benedict Drive in San Leandro, only one of several accidents Tuesday.

Arriving and departing flights at San Francisco International Airport were experiencing delays, but officials at Oakland International Airport and Mineta San Jose International Airport said most planes were on schedule.

(El Cerrito Patch and Bay City News contibuted to this report. To get San Leandro Patch delivered by email click here.)