Recorded at 1PM April 2, 2014. At the beginning of the video, I show the old 4/5 port Thunderbolt 1000T on top of Patrick Henry High School, that this siren has replaced. This siren is located on 42nd Ave. North, across from Don Swanson Field in North Minneapolis Minnesota U.S.A. My first video of the Thunderbolt 1000T on Henry High School:    • Thunderbolt 1000T 3min+ Alert