'Bomb cyclone': What to know about this kind of monster storm

 Dubbed a "bomb cyclone," the catchphrase was coined earlier this year as a nickname for another nor’easter back in early January.

Bombogenesis -- or a "bomb cyclone" -- occurs when the pressure of a storm drops 24 millibars in 24 hours, or at the rate of 1 millibar per hour. (A millibar is a measure of atmospheric pressure inside a storm, telling meteorologists how strong or weak the storm system is).

 It usually happens when a storm system moves over the warm waters of the western Atlantic Ocean and the Gulf Stream at the same time that arctic air moves in from behind. The Northeast coast of the United States experiences this at least once a year.

The difference between the two air masses helps to strengthen the storm system, creating what's known as bombogenesis.



Source: abcnews.go

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