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‘Once-in-a-generation’ winter storm freezes US: What is a bomb cyclone | World News

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A strong Arctic winter storm has positioned greater than 135 million individuals below climate alerts forward of the busiest journey days of the yr within the US. The plunging temperatures might wreak havoc throughout the US and Canada. The storm might result in frostbite on naked pores and skin in solely 5 to 10 minutes, specialists have stated. Climate alerts stretch from coast to coast and attain as far south because the US-Mexico border and Florida.

Learn extra: ‘Bomb Cyclone’ dampens Christmas revelry in US, millions affected| Videos

Main airports have cancelled hundreds of flights because the storm intensifies because the storm might deliver the iciest Christmas in many years, say forecasters. The Nationwide Climate Service (NWS) stated temperatures of -50F (-45C) and -70F have been doable by the tip of this week in some components of US.

Meteorologists have additionally stated that the winter storm might grow to be a “bomb cyclone” by Friday.

What’s a bomb cyclone?

A bomb cyclone is a storm that intensifies very quickly. These kind when air close to Earth’s floor rises rapidly within the ambiance, triggering a sudden drop in barometric stress of not less than 24 millibars inside 24 hours. Because the air rises, wind spirals in on the base of the storm. So long as the air continues to rise on the high of the storm sooner than it may be changed, barometric stress will proceed to drop.

Why is it known as a bomb cyclone?

Meteorologists have in contrast the sudden drop in stress to a bomb going off, utilizing phrases reminiscent of “explosive cyclogenesis” and “bombogenesis” to explain the storm’s formation course of. Due to this fact, the time period bomb cyclone is used because it refers back to the pace at which a storm kinds and never essentially its absolute energy.

How does a bomb cyclone differ from a hurricane?

Hurricanes are likely to kind in tropical areas powered by heat seas. For that reason, they’re most typical in summer time or early fall, when seawater is warmest.


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