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Macroburst

Meteorology  Mackerel sky  Macroscale
04/20/2014

Macrobursts downburst greater than 2.5 miles in diameter
Photograph by: Moller ...


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A convective downdraft with an affected outflow area of at least 2½ miles wide and peak winds lasting between 5 and 20 minutes.

Macroburst
A convective downdraft with an affected outflow area of at least 2?Ǭ? miles wide and peak winds lasting between 5 and 20 minutes. Intense macrobursts may cause tornado-force damage of up to F3 intensity.
Macroscale ...

Macroburst
A downburst affecting an area greater than 4 kilometres across and having damaging winds. Macrobursts are generally longer-lived than the smaller microbursts.

MACROBURST A large downburst with an outflow diameter of 2.5 miles (4 kilometers) or larger and damaging winds.
MACROSCALE The meteorological scale covering an area ranging from the size of a continent to the entire globe.

MACROBURST: Large downbursts with a 2.5 mi or greater outflow diameter and damaging winds lasting 5 to 20 minutes.
MARITIME AIR MASS: Moist air mass originating over the ocean.

Macroburst- a large downburst within a 2.5 mile or larger outflow diameter and damaging winds lasting five to twenty-five minutes.

Macroburst - A downburst (strong downdraft) that affects a path longer than 4.0 km (2.5 mi).

1. macroburst
Large thunderstorm downbursts with a 2.5 mile diameter or greater outflow of damaging winds lasting 5 to 20 minutes.

Macroburst One of 2 categories of downbursts (the other category is called a microburst). This Downburst has an affected outflow area of at least 2.5 miles wide and peak winds lasting between 5 and 20 minutes.

Although usually associated with thunderstorms, downbursts can occur with showers too weak to produce thunder. Down bursts come in the following to 2 categories: microburst and macroburst. See Microburst and Macroburst.

5 miles (4 km) in extent are sometimes called macrobursts. Sometimes downbursts are larger, in the extreme case, the derecho can cover a huge area of more than 200 miles wide (320 km) and over 1000 miles (1600 km) long, lasting upto 12 hours or more, ...

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.

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: See also: Storm, Cloud, Thunderstorm, Thunder, Front

Meteorology  Mackerel sky  Macroscale
04/20/2014

 
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