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The term "squall" is used to refer to a sudden wind-speed increase lasting minutes. In 1962 the World Meteorological Organization (WMO) defined that to be classified as a "squall", the wind must increase at least 8 metres per second (29 km/h; 18 mph) and must attain a top speed of at least 11 metres per second (40 km/h; 25 mph), lasting at least one minute in duration.
Organized thunderstorms and thunderstorm clusters/lines can have longer life cycles as they form in environments of significant vertical wind shear, normally greater than 25 knots (13 m/s) in the lowest 6 kilometres (3.7 mi) of the troposphere, [21] which aids the development of stronger updrafts as well as various forms of severe weather.
This process cause thunderstorm formation (and decay) to last for several hours or even over multiple days. Cumulonimbus clouds can also occur as dangerous winter storms called " thundersnow " which are associated with particularly intense snowfall rates and with blizzard conditions when accompanied by strong winds that further reduce visibility .
The storms could bring quarter-sized hail (1 inch) and wind gusts of up to 60 mph. "At 8:03 p.m., severe thunderstorms were located along a line extending from near Newport to near Poolville ...
The core of the storm, and the potential for wintry precipitation, will move northward, but rain and thunderstorms are forecast to sweep from Texas to the Carolina and Florida coasts into Sunday.
Austin will stay and cloudy for a little longer, with the National Weather Service predicting that multiple rounds of severe storms are set to hit in the next few hours. Severe thunderstorms ...
Severe weather can occur under a variety of situations, but three characteristics are generally needed: a temperature or moisture boundary, moisture, and (in the event of severe, precipitation-based events) instability in the atmosphere.
The severe weather in the Midwest will erupt near the center of the storm system, while severe storms extend from northern Florida to at least as far to the north as Maryland and Delaware in the ...
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