TORNADO LIFE CYCLE - NOAA

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Landspout near Kalispell, Montana 4/8/08 (photo courtesy of Suzanne Johnson).
A “waterspout” is a tornado occurring over water. Specifically, it normally refers to a small, relatively weak rotating column of air over water beneath a cumulus cloud. In most cases the term is reserved for small vortices over water that are not associated with storm-scale rotation (i.e., they are the water-based equivalent of landspouts). But there is sufficient justification for calling virtually any rotating column of air a waterspout if it is in contact with a water surface. Waterspout near Neskowin, OR 4/2/03 (photo from Tillamook County Emergency Manager, Tom Manning).
Page 1 and 2: TORNADO LIFE CYCLE Visual Clues of
Page 3 and 4: Mature tornadoes. Views to north an
Page 5 and 6: Dissipating (“rope stage”) torn
Page 7 and 8: Large tornado near Girard, Kansas,
Page 9 and 10: Cone shaped tornado located south o
Page 11 and 12: Descending tornado with debris and/
Page 13 and 14: Narrow tornado near Friona, TX, 4/1
Page 15 and 16: “Multi-vortex” tornadoes have t
Page 17 and 18: “Rope” tornadoes often signify
Page 19 and 20: Rope tornado taken near Twentynine
Page 21: “Landspout” tornadoes are torna
Page 25 and 26: A “Dust Devil” is usually a sma
Page 27 and 28: Tornado/Funnel Cloud Look-a-likes:
Page 29: Steam cloud. Courtesy Jeffrey Tower

TORNADO LIFE CYCLE - NOAA

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