‘Bomb cyclone’: US braces for explosive winter storm! (articol preluat de la BBC NEWS si prefatat de Radu Popa)

America de NV se pregateste sa infrunte „ciclonul bomba”. Un fenomen meteorologic rar in care presiunea si temperatura scad. Pe un fond de temperatura joasa vanturile foarte puternice agraveaza situatia. 11 oameni au murit deja din cauza expunerii. Zapada se va depune chiar si in Florida. Fenomenul pereche din Europa este Furtuna Elenanor (care a lasat deja 200 000 francezi fara electricitate).

Radu Popa (California)

Mai jos, articolul original:

The US is braced for a „bomb cyclone” – a weather phenomenon which officials say will arrive during a cold snap that has already claimed at least 11 lives.

Forecasters say a severe pressure drop will lead to an explosive winter storm along the eastern US, and is already bringing snow to Florida.

The US is currently on its 10th day of frigid record-breaking low temperatures which began around Christmas.

But the predicted new storm has led meteorologists to deploy a new term.

The National Weather Service (NWS) has warned that „Arctic air mass will remain entrenched over the eastern two thirds of the country through the end of the week”.

„Very cold temperatures and dangerously cold wind chills expected,” the NWS added.

What is a ‘bomb cyclone’?

A „bomb cyclone” or „weather bomb” is an unofficial term for what is known as explosive cyclogenesis, according to BBC Weather.

This occurs when the central pressure of a low pressure system falls by 24 millibars in 24 hours and can result in violent winds developing around the system.

The winds can be strong enough to bring down trees and cause structural damage.

The Washington Post adds that the coming storm will „in many ways resemble a winter hurricane” which could be the eastern US’s most intense in decades.

It comes as the average temperature across the continental US hovered around 9.1F (-12.7C) on Tuesday morning, according to CBS News.

Where is it expected to hit?

On Thursday and Friday, the major storm is expected to develop along the eastern seaboard of the US, bringing strong winds, rain, sleet and snow, according to BBC Weather.

The storm is forecast to undergo rapid cyclogenesis over the Atlantic Ocean, and current projections show areas north of New York as having the highest risk of significant impacts from strong winds and heavy snow.

Major north-eastern cities such as Boston are at risk of blizzards, and it is expected to cause disruption at air travel hubs with power outages also possible.

In the US South, freezing rain and sleet may reach as far down as Orlando, where agricultural officials say cold-sensitive crops such as citrus and strawberries are threatened.

Parts of Florida, including the northern city of Tallahassee, have already seen their first snow settling in decades.

Excited residents have been snapping photos of themselves playing in the snow, and school is cancelled in much of the state.

(sursa: bbc.com)

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