The storm may retain strong winds but changes shape, often stretching into a large comma-shaped weather system that can impact regions far from the original coast. Stage Wind Speed Status Tropical Depression < 39 mph Organized circulation, no closed eye Tropical Storm 39-73 mph Named, rotating thunderstorms increase Hurricane ≥ 74 mph Eye present, mature cyclone Extratropical Transition Variable Loses tropical characteristics, gains frontal boundaries The Process of Extratropical Transition Not every hurricane simply vanishes upon hitting land or cold water.
Understanding Rapid Weakening Factors and Transitions
In this phase, the hurricane loses its symmetric warm-core structure and begins to merge with the surrounding mid-latitude weather system. These forces act independently or in combination to disrupt the delicate balance of heat and moisture the storm requires to survive.
These environmental factors dictate the seasonal boundaries of hurricane activity, effectively creating the windows during which these storms can form and persist. Interaction with Cooler Water Even if a storm remains over water, it can encounter temperatures that are too cold.
Understanding Rapid Weakening Factors in Extratropical Transition
Some undergo a process known as extratropical transition. Landfall and Terrain Interaction The most common scenario for a hurricane to stop is through landfall.
More About When do hurricanes stop
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