Thunderstorm Terminology - KTRE.com | Lufkin and Nacogdoches, Texas

Thunderstorm Terminology

DOWNBURST - A small area of rapidly descending air beneath a thunderstorm.  A downburst forms as a pocket of cold air in a thunderstorm that rushes down toward the ground.  The strong winds in a downburst typically approach from one direction, so the winds are known as "straight-line winds."  These strong winds can exceed wind speeds of 100mph or greater and cause significant damage equal to that of a tornado.

LIGHTNING - An electrical discharge within a cloud or between a cloud and the ground. 

SEVERE THUNDERSTORM - A thunderstorm that produces hail at least 3/4-inch or greater, wind speeds of 58mph or greater, or tornadoes.

THUNDER - Sound created by the expansion and contraction of the atmosphere created by lightning.

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