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Twister Roar Approaching

Cosmic Dread Approaching

Steam Train Approaching Whistle Distant

Subway Train Approaching

Mosquito Whine Approaching Then Passing

Ambulance Siren Approaching Then Passing Wail

Thunder Rolling Distant Approaching

Sahara Sandstorm Thick Wind Wall Approaching,

Parade Marching Band Approaching, Brass And

Tropical Storm Approaching Through Jungle, Wind

African Savanna Storm Approaching Dark Clouds

Volcanic Island Pyroclastic Flow Distant Rumble

Wind Through Prayer Flags Storm Approaching

Heavy Diesel Rumble Approaching Quickly

Distant Rumble Of Approaching Storm Clouds

Deep, Rhythmic Thrumming Of A Subway

Low Frequency Hum Of Approaching Thunderstorm