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THUNDERSTORM

  • May 12, 2021
  • Posted by: OptimizeIAS Team
  • Category: DPN Topics
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THUNDERSTORM

Subject: Geography

Context: A thunderstorm accompanied by heavy rainfall hit Kolkata and the other districts of south Bengal on Tuesday afternoon. According to officials, three people were killed in rain-related incidents.

Concept :

  • Thunderstorms and tornadoes are severe local storms. They are of short duration, occurring over a small area but are violent.
  • Thunderstorm is a storm with thunder and lightning and typically also heavy rain or hail.
  • Thunderstorms mostly occur on ground where the temperature is high. Thunderstorms are less frequent on water bodies due to low temperature.
  • Worldwide, there are an estimated 16 million thunderstorms each year, and at any given moment, there are roughly 2,000 thunderstorms in progress.

Motion of a thunderstorm

  • Path of a thunderstorm is erratic. Motion is primarily due to interactions of its updrafts and downdrafts.
  • The speed of isolated storms is typically about 20 km (12 miles) per hour, but some storms move much faster.
  • In extreme circumstances, a supercell storm may move 65 to 80 km (about 40 to 50 miles) per hour.

Downbursts

  • Downdrafts are referred to as macrobursts or microbursts.
  • Macroburst is more than 4 km in diameter and can produce winds as high as 60 metres per second, or 215 km per hour.
  • A microburst is smaller in dimension but produces winds as high as 75 metres per second, or 270 km per hour
  • They are seriously hazardous to aircrafts, especially during takeoffs and landings.
Geography THUNDERSTORM

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