DOWNBURST
A severe localized downdraft from a thunderstorm or shower. This outward burst of cool or colder air creates damaging winds at or near the surface. Sometimes the damage resembles tornadic damage. See microburst. | ||||
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Downburst Definition from Science & Technology Dictionaries & Glossaries
| A COMPREHENSIVE GLOSSARY OF WEATHER |
Downburst
A strong downdraft resulting in an outward burst of damaging winds on or near the ground. Downburst winds can produce damage similar to a strong tornado . Although usually associated with thunderstorms, downbursts can occur with showers too weak to produce thunder. See dry and wet microburst .
A strong downdraft resulting in an outward burst of damaging winds on or near the ground. Downburst winds can produce damage similar to a strong tornado . Although usually associated with thunderstorms, downbursts can occur with showers too weak to produce thunder. See dry and wet microburst .
Downburst Definition from Encyclopedia Dictionaries & Glossaries
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Downburst
A downburst is created by an area of significantly rain-cooled air that, after hitting ground level, spreads out in all directions producing strong winds. Unlike winds in a tornado, winds in a downburst are directed outwards from the point where it hits land or water. Dry downbursts are associated with thunderstorms with very little rain, while wet downbursts are created by thunderstorms with high amounts of rainfall. Microbursts and macrobursts are downbursts at very small and larger scales respectively. Another variety, the heat burst, is created by vertical currents on the backside of old outflow boundaries and squall lines where rainfall is lacking. Heat bursts generate significantly higher temperatures due to the lack of rain-cooled air in their formation. Downbursts create vertical wind shear or microburst which is dangerous to aviation.
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