Another EAS advisory on Comcast Cable, this time for Allegheny County (Pittsburgh), PA, from June 2007. I included a small clip of WTAE's special report at the beginning, where meteorologist Stephen Cropper re-iterated the warning.
The flicker during the taping was a brief power outage (I live in Baldwin, one of the places mentioned, and the storm was almost directly overhead at the time).
EAS Alert - Severe Thunderstorm Warning For Allegheny County For Country: United States. City: Boston, Cape Coral, Detroit, Hayward, Pearland