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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.
Initial symptoms may include heart asystole and respiratory arrest. [1] While the asystole may spontaneously resolve fairly rapidly, the respiratory arrest is typically more prolonged. [1] Other symptoms may include burns and blunt injuries. [1] Of those who survive, about 75% have ongoing health problems as a result, such as cataracts and ...
Both severe and significant severe events warrant a severe thunderstorm warning from the United States National Weather Service (excludes flash floods), the Environment Canada, the Australian Bureau of Meteorology, the Meteorological Service of New Zealand and the Meteorological Office UK, if the event occurs in those countries.
Severe thunderstorms Wednesday night near the central Gulf Coast whipped up gusts that downed trees and spawned possible tornadoes, forecasters said. On Thursday morning, there were tornado ...
As the storm continues to move east on Christmas Day, the risk of severe thunderstorms may diminish s Downpours, severe storms to pose travel risks in south-central US after Christmas Skip to main ...
A barrage of severe weather sweeping across the Northwest and multiple south-central states could hamper post-holiday travel, forecasters warn. Powerful thunderstorms batter parts of Texas ...
A severe thunderstorm warning is issued if a thunderstorm becomes severe, or will soon turn severe. In Canada, a rainfall rate greater than 50 millimetres (2 in) in one hour, or 75 millimetres (3 in) in three hours, is also used to indicate severe thunderstorms. [38] Severe thunderstorms can occur from any type of storm cell. However, multicell ...
A severe thunderstorm outbreak, also called a severe weather outbreak or simply a severe outbreak, is an event in which a weather system or combination of weather systems produces a multitude of severe thunderstorms in a region over a continuous span of time. A severe outbreak which is most notable for its tornadoes is called a tornado outbreak.