After lightning and hail the size of ping pong balls hit the Bay Area on Friday, an even more vigorous storm is on tap Saturday.
A potent squall line is forecast to sweep through the region Saturday afternoon, raising the risk of lightning, downpours, severe wind gusts and even an isolated tornado.
Scattered showers in the morning aren’t expected to pose a threat, but that will change in the afternoon. A squall line, scientifically known as a narrow cold frontal rainband, is anticipated to move from west to east in the afternoon and evening…