Cyclolysis

With the center of the cyclone surrounded by cool air, the temperature difference or baroclinity begins to decline, and the jet stream persisting over the strongest areas of baroclinity which is not over the center of the cyclone, which makes it so that the jet stream is unable to support the system.

[4] Extratropical cyclones in the northern hemisphere tend to undergo cyclolysis over the northeast Atlantic Ocean, northwestern Europe, the Gulf of Alaska, the Pacific Northwest, northeast Canada, central Russia, or the eastern Mediterranean sea.

[8] Tropical cyclones often undergo cyclolysis after making landfall, especially if the land is mountainous as the friction with the terrain is increased.

Excessive wind shear can also cause cyclolysis as it causes the convection that powers the tropical cyclone to move away from the center.

Mesocyclones typically undergo cyclolysis when the gust front of the storm blocks off the updraft.