Cyclone model

Source: NOAA

Norwegian Cyclone Model

The Norwegian cyclone model, so named to honor the Norwegian meteorologists who first conceptualized the typical life cycle of cyclones in the 1910s and 1920s, presents the evolution of a cyclone. In this model, there will initially be a boundary, or front, separating warm air to the south from cold air to the north. The front is often stationary. (Left - Overhead view; Right - 3D view)

caption Image:CM1.gif     caption Image:CM2.jpg

A wave on the front will form as an upper level disturbance embedded in the jet stream moves over the front. The front develops a "kink" where the wave is developing. Precipitation will begin to develop with the heaviest occurrence along the front (dark green).

caption Image:CM3.gif     caption Image:CM4.jpg

As the wave intensifies, both cold and warm fronts become better organized.

  caption Image:CM5.gif     caption Image:CM6.jpg

The wave becomes a mature low pressure system, while the cold front, moving faster than the warm front, "catches up" with the warm front. As the cold front overtakes the warm front, an occluded front forms.

  caption Image:CM7.gif     caption Image:CM8.jpg

As the cold front continues advancing on the warm front, the occlusion increases and eventually cuts off the supply of warm moist air, causing the low pressure system to gradually dissipate.

  caption Image:CM9.gif     caption Image:CM-10.jpg  





(2009). Cyclone model. Retrieved from


To add a comment, please Log In.