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These storms are called “post-tropical cyclones” by the NWS. Hurricane, tropical storm, and storm surge watches and warnings can also be issued for storms that have lost some or all of their tropical cyclone characteristics, but continue to produce dangerous conditions. These storms are referred to as “potential tropical cyclones” by the NWS. In these cases, the forecast conditions on land warrant alerting the public.

Please note that hurricane and tropical storm watches and warnings for winds on land as well as storm surge watches and warnings can be issued for storms that the NWS believes will become tropical cyclones but have not yet attained all of the characteristics of a tropical cyclone (i.e., a closed low-level circulation, sustained thunderstorm activity, etc.). Take immediate shelter in the interior portion of a well-built structure.

Extreme Wind Warning: Extreme sustained winds of a major hurricane (115 mph or greater), usually associated with the eyewall, are expected to begin within an hour.

Tropical Storm Warning: Tropical storm conditions (sustained winds of 39 to 73 mph) are expected within your area within 36 hours.

NHC issues a hurricane warning 36 hours in advance of tropical storm-force winds to give you time to complete your preparations.

Hurricane Warning: Hurricane conditions (sustained winds of 74 mph or greater) are expected somewhere within the specified area.

If you are under a storm surge warning, check for evacuation orders from your local officials.

Storm Surge Warning: There is a danger of life-threatening inundation from rising water moving inland from the shoreline somewhere within the specified area.

The difference between Tropical Storm and Hurricane Watches, Warnings, Advisories and Outlooks Warnings:Listen closely to instructions from local officials on TV, radio, cell phones or other computers for instructions from local officials. A Hurricane has max sustained winds of 74 mph or higher! Hurricane: Intense tropical weather system of strong thunderstorms with a well-defined surface circulation.

Tropical Storm: Organized system of strong thunderstorms with a defined surface circulation and maximum sustained winds of 39-73 mph. Tropical Depression: Organized system of clouds and thunderstorms with defined surface circulation and max sustained winds of 38 mph or less. The Tropical Cyclones we track in the Atlantic basin are called Tropical Depressions, Tropical Storms and Hurricanes!Ītlantic Basin Tropical Cyclones are classified as follows: Depending upon location, tropical cyclones have different names around the world. It develops over tropical or subtropical waters, and has an organized circulation. The official Atlantic Basin Hurricane Season runs from June 1st to November 30th.Ī tropical cyclone is a warm-core, low pressure system without any “front” attached.

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