1) Weather hazard 
A microburst is a small-scale downburst, thus a very localized column of sinking air caused by a small and intense downdraft (the air does not spin like it does in the case of a cyclone or tornado) within a thunderstorm. There are two types of microbursts: wet microbursts and dry microbursts. They go through three stages in their life cycle: the d...
A strong localized downdraft from a thunderstorm with peak gusts lasting 2 to 5 minutes.
pattern of intense winds that descends from rain clouds, hits the ground, and fans out horizontally. Microbursts are short-lived, usually lasting ... [3 related articles]
A strong localized downdraft from a thunderstorm with peak gusts lasting 2 to 5 minutes.
A downburst from a thunderstorm that is confined to a small area.
A small, very intense downdraft affecting an area of less than 4 kilometers wide. Microbursts are capable of producing winds of more than 100 mph causing significant damage on the ground. They are a serious threat to aviation
a small, very intense downdraft that descends to the ground
The microburst is a downburst which is confined to a small area, less than 4 km (2.5 miles) in diameter from the initial point of downdraft impact and lasting for less than 10 minutes. An intense microburst can result in damaging winds near 280 km/hr (170 mph).
A small downdraft of air with an outflow diameter of less than 2.5 miles with the peak winds lasting from 2 to 5 minutes. May affect aircraft performance.