A family on a houseboat at Lake Powell experienced the powerful winds of a sudden downburst storm. They jumped on top of the loose life jackets and floats as they started blowing off the back deck as the storm continued to hit them.
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What’s a down burst?
A downburst is a strong ground-level wind system that emanates from a point source above and blows radially, that is, in straight lines in all directions from the point of contact at ground level. Often producing damaging winds, it may be confused with a tornado, where high-velocity winds circle a central area, and air moves inward and upward; by contrast, in a downburst, winds are directed downward and then outward from the surface landing point.
More from Wikipedia: https://en.wikipedia.org/wiki/Downburst