Severe Weather Statement issued August 16 at 4:59AM PDT by NWS

…A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM PDT FOR MARIN…ALAMEDA…SAN MATEO…SANTA CRUZ…EASTERN SONOMA… CONTRA COSTA…SAN FRANCISCO…SANTA CLARA…NORTHWESTERN MONTEREY AND NAPA COUNTIES… At 458 AM PDT, everal severe thunderstorms were located along a line extending across the region, moving north at 40 to 50 mph.