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Cloud. Cumulonimbus cloud; Arcus cloud; Downburst. Microburst; Heat burst; Derecho; Lightning. Volcanic lightning; Thunderstorm. Air-mass thunderstorm; Thundersnow
Thunderstorm asthma is the triggering of an asthma attack by environmental conditions directly caused by a local thunderstorm. During a thunderstorm, pollen grains can absorb moisture and then burst into much smaller fragments with these fragments being easily dispersed by wind.
For example, a pool of cold air aloft may aid in the development of large hail from an otherwise innocuous-appearing thunderstorm. The most severe hail and tornadoes are produced by supercell thunderstorms, and the worst downbursts and derechos (straight-line winds) are produced by bow echoes.
In Canada, a severe thunderstorm is defined as having wind gusts of greater than 90 km/h (56 mph), hail with a diameter of greater than two centimetres (0.79 in), rainfall rates of greater than 50 millimetres (2.0 in) in one hour or greater than 75 millimetres (3.0 in) in three hours, or tornadoes. [14]
A tornado is an example of an extreme weather event. This tornado struck Anadarko, Oklahoma during a tornado outbreak in 1999.. Extreme weather includes unexpected, unusual, severe, or unseasonal weather; weather at the extremes of the historical distribution—the range that has been seen in the past.
The governor's office warned that severe thunderstorms are forecast in portions of north, central, east and southeast Texas. ... 15 over-the-top examples of wealth and luxury I saw on my first ...
The severe thunderstorm threat this week is expected to feature a heightened flood risk in addition to all other hazards that come along with severe thunderstorms. This heightened risk will come ...
Mesoscale Convective Systems are clusters of thunderstorms that can create flooding and damaging winds. Mudslides become much more likely after days of heavy rain or wildfires. Show comments