Family of tornadoes: Difference between revisions
From Glossary of Meteorology
imported>Perlwikibot No edit summary |
imported>Perlwikibot No edit summary |
||
| Line 9: | Line 9: | ||
</div> | </div> | ||
<div class="definition"><div class="short_definition">A sequence of long-lived tornadoes produced by a | <div class="definition"><div class="short_definition">A sequence of long-lived tornadoes produced by a "cyclic" [[supercell]] storm.</div><br/> <div class="paragraph">Tornadoes touch down at quasi-regular intervals (typically 45 min). Usually a new [[tornado]] develops in a new [[mesocyclone]] just after an old tornado has decayed in an old, occluded neighboring mesocyclone. Sometimes, two successive tornadoes may overlap in time for a few minutes. The two mesocyclones may rotate partially around each other. If the damage tracks of the tornadoes appear to form a wavy broken line, the family is classified as a series mode. In the more common parallel-mode family, the damage tracks are parallel arcs with each new tornado forming on the right side of its predecessor. The parallel mode is subcategorized into left turn and right turn, according to the direction in which the paths curve.</div><br/> </div><div class="reference">Davies–Jones, R. 1986. Tornado dynamics. Thunderstorm Morphology and Dynamics. E. Kessler, Ed., Univ. of Okla. Press, . p. 223. </div><br/> | ||
</div> | </div> | ||
Latest revision as of 14:12, 20 February 2012
family of tornadoes
A sequence of long-lived tornadoes produced by a "cyclic" supercell storm.
Tornadoes touch down at quasi-regular intervals (typically 45 min). Usually a new tornado develops in a new mesocyclone just after an old tornado has decayed in an old, occluded neighboring mesocyclone. Sometimes, two successive tornadoes may overlap in time for a few minutes. The two mesocyclones may rotate partially around each other. If the damage tracks of the tornadoes appear to form a wavy broken line, the family is classified as a series mode. In the more common parallel-mode family, the damage tracks are parallel arcs with each new tornado forming on the right side of its predecessor. The parallel mode is subcategorized into left turn and right turn, according to the direction in which the paths curve.
Davies–Jones, R. 1986. Tornado dynamics. Thunderstorm Morphology and Dynamics. E. Kessler, Ed., Univ. of Okla. Press, . p. 223.
