Bow echoes: Difference between revisions
From Glossary of Meteorology
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[[ | {{Term | ||
|Display title=bow echo | |||
|Definitions={{Definition | |||
|Num=1 | |||
|Meaning=A bow-shaped line of convective cells that is often associated with swaths of damaging [[straight-line winds]] and small [[tornadoes]]. | |||
|Explanation=Key structural features include an intense [[rear-inflow jet]] impinging on the core of the bow, with [[book-end]] or [[line-end vortices]] on both sides of the rear-inflow jet, behind the ends of the bowed convective segment. Bow echoes have been observed with scales between 20 and 200 km, and often have lifetimes between 3 and 6 h. At early stages in their evolution, both [[cyclonic]] and [[anticyclonic]] book-end vortices tend to be of similar strength, but later in the evolution, the northern cyclonic vortex often dominates, giving the convective system a comma-shaped appearance. | |||
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Revision as of 23:17, 13 January 2024
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A bow-shaped line of convective cells that is often associated with swaths of damaging straight-line winds and small tornadoes.
Key structural features include an intense rear-inflow jet impinging on the core of the bow, with book-end or line-end vortices on both sides of the rear-inflow jet, behind the ends of the bowed convective segment. Bow echoes have been observed with scales between 20 and 200 km, and often have lifetimes between 3 and 6 h. At early stages in their evolution, both cyclonic and anticyclonic book-end vortices tend to be of similar strength, but later in the evolution, the northern cyclonic vortex often dominates, giving the convective system a comma-shaped appearance.