Glossary of weather terminology

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B

Term Definition
Backed

Winds which shift in a counterclockwise direction with time at a given location (e.g. from southerly to southeasterly), or change direction in a counterclockwise sense with height (e.g. westerly at the surface but becoming more southerly aloft). The opposite of veering winds.

In storm spotting, a backing wind usually refers to the turning of a south or southwest surface wind with time to a more east or southeasterly direction. Backing of the surface wind can increase the potential for tornado development by increasing the directional shear at low levels.

Boundary

A boundary or transition zone between two air masses of different density, and thus (usually) of different temperature. A moving front is named according to the advancing air mass, e.g., cold front if colder air is advancing.

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Chase Stats

2004-05-24 - 2017-10-06
Chases:
Busts*:
Tornadoes:
Tornado days:
Severe Hail:
Severe Wind:
Active Hours*:
Miles:
107
38
37
22
8
7
905
45,865
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