The environmental conditions at around a cyclone differ substantially from one location to another. For example, air temperatures are lowest to the northwest of a cyclone center where strong and gusty northwest winds advect cP or A air southward and eastward. A tendency to clear sky is evident to the west of the center where precipitation tapers off to showers as the cyclone moves toward northeast, while the leading of cold air located south of the cyclone center is accompanied by a narrow band of showers, and embedded thunderstorms. To the southwest, skies are generally clear associated with sinking motion, while skies are partly cloudy with possible convective showers during the afternoon to the southeast of the center where south and southwest winds advect milder mT air northward from over Gulf of Mexico. To the north and northeast, a zone of extensive overrunning as mT air surges over a wedge of cool air maintained by east and northeast winds at the surface.
Skies are cloudy, and precipitation is steady and substantial to the northeast.
A midlatitude cyclone's life cycle typically last three days. However, when conditions are favorable, the cyclone can progress from its birth to maximum intensity in 24 hr or less. A rapid intensification of a cyclone whose pressure drops by at least 24 mb in 24 hr is named bomb . Only a few cyclones satisfy the condition for the bomb, which is usually observed when a cyclones moves off the East coast of North America or Asia over warm ocean currents of Gulf Stream or Kuroshio. Under unfavorable conditions, the cyclone never progress to a fully occluded system, instead spending its lifespan as a weak cyclone rippling along a statinary front.