Meanwhile, for media set over the last few decades, if the scene calls for a storm siren, you can be sure it's probably going to be the throaty howl of a Federal Signal Thunderbolt 1000T Tornado Siren.Apparently, the British company Carter Gents of Leicester has a global, temporal, and metaphysical monopoly on making air raid sirens, because, regardless of universe and time period, an air raid of some description will always be prefaced with the sound of a Carter Gents siren (skip to 1:35 to hear the siren running) from World War II.