Downbursts severe localized downdrafts
Damaging thunderstorm winds have been termed downbursts by renowned severe storm researcher Dr. Ted Fujita. Dr.
Downbursts, particularly microbursts, are exceedingly dangerous to aircraft which are taking-off or landing. A number of fatal crashes have been attributed to downbursts.
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downburst"An area of strong, often damaging winds produced by a convective downdraft over an area from less than 1 to 10 km in horizontal dimensions.
Downburst
Violent and damaging downdraught striking the surface of the Earth violently. Associated with a severe thunderstorm.
Drizzle ...
Downburst - an intense localized downdraft which may be experienced beneath a thunderstorm, typically a severe thunderstorm; it results in an outward burst of damaging winds on or near the ground ...
Downbursts: Surface winds in excess of 62 km/hr (39 mph) caused by a small-scale downdraft from the base of a convective cloud.
DOWNBURST: A severe localized downdraft from a thunderstorm.
DRIZZLE: Small, slowly falling water droplets, with diameters between .2 and .5 millimeters.
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.
Downburst - a strong burst of wind from a thunderstorm, also called a microburst.
Drizzle - liquid water precipitation in the form of tiny droplets, much smaller and slower moving than raindrops.
Downburst- a vertical or nearly vertical downward burst of strong winds at ground level, usually associated with a thunderstorm.
Drizzle- a form of precipitation that consists of water droplets less than .5mm.
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. Related term: microburst ...
DOWNBURST - A strong downdraft of air which induces an outburst of damaging winds on or near the ground.
DRIFTING SNOW - An uneven distribution of snowfall/snow depth caused by strong surface winds, but does not reduce surface visibility.
Downbursts A severe localized downdraft that can be experienced beneath a severe thunderstorm. (Compare Microburst)
Downdraft Downward moving air, usually within a thunderstorm cell.
Downburst A strong down draft, initiated by a thunderstorm, that induces an outburst of damaging straight line winds on or near the ground. Downburst winds can produce damage similar to a strong tornado.
Downburst A strong and potentially destructive thunderstorm downdraft; depending on size, classified as either a microburst or a macroburst.
Downburst
A strong downdraft current of air from a cumulonimbus cloud, often associated with intense thunderstorms. Downdrafts may produce damaging winds at the surface.
Downdraft ...
Downburst - A strong downward rush of air which produces a blast of damaging wind on or close to the surface.
Downburst- A sudden, strong, downward blast of air, usually from a thundercloud.
Drizzle- Precipitation featuring tiny water droplets, no more than .02 inches in diameter.
Drought- Abnormally dry weather in a region over an extended period.
1985: The Downburst - Microburst and Macroburst. SMRP Research Paper No. 210, University of Chicago, 122 pp.
Marshall, Tim, 19--: Storm Chase Manual. Published annually in association with Storm Track.
MACROBURST A large downburst with an outflow diameter of 2.5 miles (4 kilometers) or larger and damaging winds.
HP storms often produce extreme and prolonged downburst events, serious flash flooding, and very large damaging hail events.hPaHectopascal- A unit of pressure equal to a millibar (1 hPa = 1 mb).
A downburst that affects a path on the 31 Wind: ground longer than 2.5 miles. Meridional: N-S, S-N. More violent Weather. 32 Wind: Microbursts. A downburst the affects a path on the ground shorter that 2.5 miles. 33 Wind: Monsoon.
Storms possessing this structure have been observed to generate the vast majority of long-lived strong and violent (F2-F5) tornadoes, as well as downburst damage and large hail.
Heat-burst Like a downburst from a thunderstorm which brings destructive winds, a heat-burst sometimes occurs as a result of sinking motion within the downdrafts of thunderstorms.
Microburst: One of 2 categories of downbursts (the other category is called a macroburst). This Down burst has an affected outflow area of less than 2.5 miles wide and peak winds lasting less than 5 minutes.
*Microburst - A small, concentrated downburst affecting an area less than 4 kilometers (about 2.5 miles) across. Most microbursts are rather short-lived (5 minutes or so), but on rare occasions they have been known to last up to 6 times that long.
CLOUDBURST A sudden, heavy rainfall of a showery nature. Related term: downburst
COALESCENCE The merging of two water drops into a single larger drop.
Air mass thunderstorms are generally less likely to be severe than other types of thunderstorms, but they are still capable of producing downbursts, brief heavy rain, and (in extreme cases) hail over 2cm in diameter.
Gust Front - The leading edge of gusty surface winds from thunderstorm downdrafts; sometimes associated with a shelf cloud or roll cloud. See also downburst, gustnado, outflow boundary.
A strong localized downdraft less than 4 km wide that occurs beneath severe thunderstorms. A strong downdraft greater than 4 km across is called a downburst.
Microclimate(6)
The climate structure of the air space near the surface of the earth.
WSR-95D - Later generation Doppler radar improved on the WSR-88D series. Used mostly as part of the downburst warning system for the FAA. This radar can "slice" through storm features in addition to the volumetric scans.
They generally are less likely to be severe than other types of thunderstorms, but they still are capable of producing downbursts, brief heavy rain, and (in extreme cases) hail over 3/4 inch in diameter.
microburstAn intense, localized downdraft of air that spreads on the ground, causing rapid changes in wind direction and speed; a localized downburst.
These sudden winds were probably faster than 70 mph when they hit the boat. This accident is one that the late Ted Fujita examined in detail. It's described in his book, The Downburst: Microburst and Macroburst, ...
 See also: Storm, Thunder, Thunderstorm, Cloud, Weather
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