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Thunderstorms occur throughout the world, even in the polar regions, with the greatest frequency in tropical rainforest areas, where they may occur nearly daily. At any given time, approximately 2,000 thunderstorms are occurring on Earth. [95]
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.
The F4 tornado was the largest tornado on record at the time with a peak width of 2.5 miles (4.0 km) as it struck Hallam, Nebraska. [214] This is the first time a High Risk did not appear until the 01Z outlook within an outlook cycle, which has occurred one additional time since (on April 30, 2010). May 24: 2004: Nebraska, Iowa [215] 54
How many volts are in a lightning strike? A typical lightning bolt carries about 300 million volts and 30,000 amps, according to the NWS . Compare that to the typical household's electric current ...
In an average thunderstorm, the energy released amounts to about 10,000,000 kilowatt-hours (3.6 × 10 13 joule), which is equivalent to a 20-kiloton nuclear warhead. A large, severe thunderstorm might be 10 to 100 times more energetic. Lightning sequence (Duration: 0.32 seconds)
The larger and denser graupel is either suspended in the middle of the thunderstorm cloud or falls toward the lower part of the storm. [34] Typically, the upper part of the thunderstorm cloud becomes positively charged while the middle to lower part of the thunderstorm cloud becomes negatively charged.
Squall lines are thunderstorms arranged in a line, often from north to south. They can be hundreds of miles long but are usually only about 10 to 20 miles wide.
Tornado and severe thunderstorm outbreaks are most common in March, April and May, the time of year known to meteorologists as severe weather season. ... Tornadoes can occur at any time, but they ...