Special Weather Statement issued May 30 at 2:13PM PDT by NWS

…SIGNIFICANT WEATHER ADVISORY FOR CENTRAL ALAMEDA…CENTRAL CONTRA COSTA AND SOUTH CENTRAL NAPA COUNTIES UNTIL 315 PM PDT… At 212 PM PDT, Doppler radar was tracking a number of developing thunderstorms along a line extending from Vallejo to near Sunol in the East Bay of the San Francisco Bay Area. Movement was north at 15 mph.