CSV 12 - Valley Springs Thunderbolt 1003 - Crazy High Low Signal w/Ambient Sirens

CSV 13 - Hills 3T22 - Steady High Low and Wailing High Low Signal

CSV 02 - Rock Rapids Thunderbolt 1003 - Steady High Low Signal

Thunderbolt 1003/3T22 high/low melody,with a pulse.

Valley Springs Thunderbolt 1003 | Crazy High Low Signal Re-upload

FS Thunderbolt 1003 - Alert, Hi-Lo - Lake Bluff, IL

Something to behold

CSV 03 - Madison Thunderbolt 1003 - Steady High Low and Steady/Alert Signal w/Ambient Sirens

ЖУТКАЯ СИРЕНА ТОРНАДО - Dodge City Twin Tornadoes 5-24-16

Federal Thunderbolt 1003 Short Test With Vacuum Motor As The Blower

Observed Tornado Warning! Thunderbolt 1003 Siren Activation

3t22 in Clyde Ohio and the screech scared the crap out of me

Federal Signal Thunderbolt 1003 - Fire Signal

Sirens taking damage compilation - PART 1

Madison Thunderbolt 1003 Alert | High Low | Attack Re-upload

(VHS Video) FS&S Thunderbolt 1003A 3Min Hi Lo, Silverstreet, SC 6/4/22

Thunderbolt 1000T Siren Test Tinley Park, IL

Federal Thunderbolt 1003 Siren Test | Hi-Lo Signal

Federal Signal Thunderbolt 1003 | Hi-Lo | Harrodsburg, Mercer County, KY

6/7/05 - Illinois Statewide Monthly Siren Test - Barrington EOWS 612 (Whoop)

Federal Signal | Thunderbolt 1003