A flood advisory was issued by the National Weather Service on Friday at 12:33 p.m. valid from 4 p.m. until Saturday 1 a.m. for Allegheny County.

A flood advisory was issued by the NWS San Francisco CA on Friday at 11:51 a.m. in effect until 1:45 p.m. for San Mateo County.

The NWS Greenville-Spartanburg SC issued a flood advisory at 11:47 p.m. on Thursday in effect until Friday at 3 a.m. for Madison County.

Thunderstorms brought heavy rains and caused flash flooding in portions of West Virginia, while a wintry mix coated trees and roads in ice and even dropped “thunder ice” in several states

Multiple drivers had to be rescued after getting stranded in the floodwaters, authorities in West Virginia said.

Residents and storm spotters in portions of Indiana, southern Michigan, Ohio and Pennsylvania reported the unusual mix of freezing rain accompanied by flashes of lightning in the unstable air.