What is a bomb cyclone?
A bomb cyclone is simply a storm that intensifies very rapidly. Bomb cyclones form when the air near Earth’s surface rises quickly in the atmosphere, triggering a sudden drop in barometric pressure at least 24 millibars within 24 hours.
As the air rises, wind spirals in at the base of the storm. As long as the air continues to rise at the top of the storm faster than it can be replaced at the bottom, barometric pressure will continue to drop. As with a hurricane, lower air pressure yields a stronger storm.
Explosive cyclogenesis is the rapid deepening of an extratropical cyclonic low-pressure area. Even though only a minority of the bombs become so strong, some have caused significant damage.
Bomb cyclone occurs when a non-tropical storm experiences at least a 24 millibar drop within 24 hours. Low pressure makes for intense storms, so a bomb cyclone is a system that’s built up a significant amount strength in a short length of time.