bombogenesis
n.— «Bombogenesis is defined as a mid-latitude cyclone that drops in surface barometric pressure by 24 or more millibars in a 24-hour period. The height contours pack around the center of rotation and the number of height contours increases rapidly in the developing stages.» —“Bombogenesis” by Jeff Haby The Weather Prediction Mar. 7, 2004. (source: Double-Tongued Dictionary)