What is bombogenesis

 

Some of y'all asked for a further explanation on the term bombogenesis.  This is a quick little post That will go into a little more detail about it.

For a storm like a  nor'easter to undergo bombogenesis, The rule of thumb is that the mid level cyclone's  central pressure  generally has to drop 24 millibars  in 24 hours. But the pressure drop depends on the latitude/parallel  that the storm is on

As many of you know Longitude (Meridian) runs north to south. Longitude is a measure of distance west or east of the prime meridian. The prime meridian sits at longitude 0° on one side of the globe and 180°on the other side of the globe 

Where as latitude/parallel runs east to west, and is a measure of distance north North and south Of the equator. The equator is on the 0 ° latitude where is the North Pole is at 90° north latitude and the South Pole is at 90 ° south latitude.

Getting back to the idea of bombogenesis.

As I said above a Storm that becomes a bomb cyclone is  generally considered to have undergone A drop in central pressure of at least 24 millibars In 24 hours. But that really depends where you are standing on the Earth. The pressure drop requirement really depends on the latitude that the storm is on. For example If a storm is on the 60 ° latitude Then a pressure drop  is actually 24 millibars in 24 hours. But if the storm is on 40° latitude (The latitude line that New York City  lies on) the pressure drop is only 17.8 millibars in 24 hours.

The reason for this has to due with something called the Coriilis force.  The Coriolis Force becomes stronger the further north or south it gets from the equator.  Link to coriiolis force

A Link to a post I did several years ago that covers bombogenesis