The article has been automatically translated into English by Google Translate from Russian and has not been edited.
Переклад цього матеріалу українською мовою з російської було автоматично здійснено сервісом Google Translate, без подальшого редагування тексту.
Bu məqalə Google Translate servisi vasitəsi ilə avtomatik olaraq rus dilindən azərbaycan dilinə tərcümə olunmuşdur. Bundan sonra mətn redaktə edilməmişdir.

Why tornadoes often occur after a hurricane lands on land

Tornadoes start at the outer edges of hurricanes. When a storm hits land, an increase in surface friction can lead to air vortices, explains New York Times.

Photo: Shutterstock

When Hurricane Isaiah swept through the Mid-Atlantic states on Tuesday, August 4, despite the steady ebb of its winds, a new threat arose - a tornado.

“Hurricanes often generate tornadoes, and they are similar to those caused by severe thunderstorms in the Central Plains,” said Yana Hauser, assistant professor of meteorology at Ohio University.

When tornadoes form, they form in the outer rain strips of hurricanes containing convective cells - thunderstorms.

But as long as the hurricane moves over the water, tornadoes won't form, Hauser explains. The thing is that the surface of the water is relatively smooth, and in the formation of a tornado "the biggest reason is surface friction."

Once the rain streaks reach the ground, surface friction increases significantly. This slows down storm winds near the ground.

“You suddenly create a situation in which the speed and (quite often) the direction of the wind changes,” she said. This is called wind shear and can cause rotational motion in the air.

On the subject: Tropical storm Isaiah sweeps east coast: at least 6 dead

This first creates a rotating cylinder of air parallel to the surface. But, as with any thunderstorm, the hurricane's convective cells create strong updrafts. They can tilt the rotating air vertically: this is how a tornado is born.

If the upward flow is very strong, the rotating air will be compressed more, with a smaller diameter. When this happens, the tornado can intensify - like a skater stretches her arms out to increase her spin.

This can lead to a powerful destructive tornado.

“But they are usually not as long-lived and tend to be slightly weaker than those formed from super-cells in the Central Plains,” she said.

The threat of a tornado diminishes as the hurricane weakens.

Miscellaneous Hurricane tornado Educational program

Read also on ForumDaily:

Floods, tornadoes and power outages: Tropical storm Isaiah comes ashore

Hurricanes, floods, fires: which US states are most prone to natural disasters

US $ 10 Billion Natural Disaster Damage for Six Months: Which States Suffer Most

Hurricane Season: Despite Early Records, 98% of Storm Activity Still Ahead

Let's face the crisis together and support each other

Thank you for staying with us and trusting! Over the past 5 years, we have received a lot of grateful feedback from readers, whom our materials have helped to arrange life after moving to the USA. We have big plans, we don't want to stop or slow down the pace of work. Even now…

The COVID-19 pandemic has negatively affected our income, and in order to stay afloat, we have to ask YOU for support. We will be grateful for any amount and will make every effort to continue to publish news and a lot of useful information just as quickly.

Thank you for being with us!

Always yours, ForumDaily! WomanForumDaily, NewYork, ForumDaily!

Security of contributions is guaranteed by the use of the highly secure Stripe system.

Do you want more important and interesting news about life in the USA and immigration to America? Subscribe to our page in Facebook. Choose the "Display Priority" option and read us first. And don't forget to subscribe to ForumDaily Woman and ForumDaily New York - there you will find a lot of interesting and positive information.



1056 requests in 1,854 seconds.