Macrobursts downburst greater than 2.5 miles in diameter
Photograph by: Moller ...
Macroburst - permalink - collapse
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A convective downdraft with an affected outflow area of at least 2Â½ miles wide and peak winds lasting between 5 and 20 minutes. Intense macrobursts may cause tornado-force damage of up to F3 intensity.
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.
A downburst affecting an area greater than 4 kilometres across and having damaging winds. Macrobursts are generally longer-lived than the smaller microbursts.
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.
METEOROLOGY: The study of the atmosphere and atmospheric phenomena.
~- a large downburst within a 2.5 mile or larger outflow diameter and damaging winds lasting five to twenty-five minutes.
~ A downburst (strong downdraft) that affects a path longer than 4.0 km (2.5 mi).
Magnetosphere Regions of the upper atmosphere encompassed by the Earth's magnetic field; deflected by solar wind into a teardrop-shaped cavity.
A large downburst iwht an outflow diameter of 2.5miles or larger and damaging winds.
The meteorological scale covering an area ranging from the size of a continent to the entire globe.
Large thunderstorm downbursts with a 2.5 mile diameter or greater outflow of damaging winds lasting 5 to 20 minutes.
~ 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. Intense ~s may cause tornado-force damage up to F-3.
~ - A large downdraft of air with an outflow diameter of 2.5 miles or greater and damaging winds lasting from 5 to 20 minutes. This may reach tornado intensity.
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 ~. See Microburst and ~.
5 miles (4 km) in extent are sometimes called ~s. 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 ~. SMRP Research Paper No. 210, University of Chicago, 122 pp.
Marshall, Tim, 19--: Storm Chase Manual. Published annually in association with Storm Track. Contact: 1336 Brazos Blvd, Lewisville TX 75067.
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 ~, published by the University of Chicago in 1985.
See also: What is the meaning of Storm, Front, Thunder, Cloud, Thunderstorm?