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The result is the nearly daily development of clouds that produce thunderstorms. For example, "Lightning Alley"—an area from Tampa to Orlando—experiences an extremely high density of lightning strikes. As of 2007, there were as many as 50 strikes per square mile (about 20 per km 2) per year.
Single-cell thunderstorms form in environments of low vertical wind shear and last only 20–30 minutes. 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 ...
A progressive derecho produced widespread wind damage, including a measured thunderstorm wind gust of 120 miles per hour (193 km/h) near Atwater, Minnesota. 194 damaging wind gusts were reported, including 5 hurricane force. [181] Twenty-nine tornadoes were also confirmed; one was rated F2.
Tornadoes and thunderstorms often spring up in various conditions, such as mix of warm, moist air, sufficient wind shear, and weather fronts. ... generally gets about 40 tornadoes per year in Iowa ...
Global monitoring indicates that lightning on Earth occurs at an average frequency of approximately 44 (± 5) times per second, equating to nearly 1.4 billion flashes per year. [76] Median duration is 0.52 seconds [ 77 ] made up from a number of much shorter flashes (strokes) of around 60 to 70 microseconds . [ 78 ]
So far in 2024, the National Weather Service Kansas City has issued 22 tornado warnings and 136 severe thunderstorm warnings across their service area, from eastern Kansas to eastern Missouri’s ...
The weather pattern has been ripe for large complexes of thunderstorms to form and travel dozens to hundreds of miles over the central region of the U.S. This is typically how much of the Plains ...
So an intensity of 115 kn is rated Category 4, but the conversion to miles per hour (132.3 mph) would round down to 130 mph, making it appear to be a Category 3 storm. Likewise, an intensity of 135 kn (~155 mph, and thus Category 4) is 250.02 km/h, which, according to the definition used before the change would be Category 5.