The process of cyclone formation

Thunderstorms formed by strong convection in the air, can be accompanied by lightning or tornadoes, hail, with wind gusts of 92 km / h or more.

How does thunderbolt form?

According to NSSL, the thunderstorm research office belongs to the US National Oceanic and Atmospheric Administration (NOAA), it is a phenomenon of heavy rain with lightning, caused by very strong convection in the atmosphere.

Super thunder broke the trunk of a tree, fell into a car in Carrollton, Illinois on June 13.(Photo: Fox2)

Convection forms when the ground heats up due to the absorption of a lot of solar radiation, causing the hot and humid air to rise high, intersecting the air stream with lower temperature spilling downwards.

A thunderstorm undergoes three stages of initiation, maturity and decline. At the inception phase, convection creates cumulonimbus clouds, which look like pylons rolled upwards, may not rain and come with lightning. At the maturity stage, cumulonimbus continued to grow, appearing pylon pushing air down, the rain began to fall. Hail, showers, thunderstorms, strong winds and tornadoes can occur. Finally, in the decline phase, the steam in the cloud clusters fades, the rain is lighter, but there may still be lightning.

Stages of thunderstorms formation.Graphics: NSSL

A "thunderstorm" is when it occurs with hail , or a wind with a speed of 92 km / h or a tornado . Worldwide, an estimated 16 million thunderstorms are estimated each year. There are always about 2,000 thunderstorms forming.

There are about 100,000 thunderstorms happening every year in the US, 10% of them are superstorms . It usually occurs in the spring and summer months, in the evening, however, they can occur all year round, at any time.

In the US, thunderstorms and showers appear in many localities since the beginning of June. According to USA Today, Kelly Delay photographer captures the superstorm that appeared in Simla, Colorado state on June 4, with two tornadoes entwined. AP said there were at least eight tornadoes passing through Colorado that day, destroying and damaging many homes. In Missouri and Illinois, a superstorm swept through June 13 with winds of nearly 180 km / h, pouring trees and houses.

Two tornadoes swirled together in Simla in early June. (Photo: USA Today)

In Hanoi , there was also a rare supernova over the weekend, with a storm of equivalent storm, some places appeared tornadoes . Deputy General Director of the National Center for Hydrometeorology Le Thanh Hai assessed that this phenomenon is less likely to repeat in the future. He added that superstorms often occur in urban areas, because houses are heavily concrete, absorbing a lot of solar energy, creating a lot of strong convection .