Hurricane Storm Surge Flooding Map to be issued by National Hurricane Center

Posted on May 27, 2014 By

Maximum Of the Maximum Envelope Of Waters Computed using NOAA's SLOSH (Sea, Lake, and Overland Surge from Hurricanes) storm surge model. Courtesy Weather Underground.

Maximum Of the Maximum Envelope Of Waters
Computed using NOAA’s SLOSH (Sea, Lake, and Overland Surge from Hurricanes) storm surge model. Courtesy Weather Underground.

The NHC will issue the Potential Storm Surge Flooding Map for those areas along the Gulf and Atlantic coasts of the United States at risk of storm surge from a tropical cyclone. Developed over the course of several years in consultation with emergency managers, broadcast meteorologists, and others, this new map will show: Geographical areas where inundation from storm surge could occur. How high above ground the water could reach in those areas.

The Potential Storm Surge Flooding Map is an experimental National Weather Service product that provides valuable new information on the storm surge hazard associated with tropical cyclones. Storm surge is often the greatest threat to life and property from a hurricane. However, many people do not understand this term or the threat it represents.

Here are some things to know about this map: The first map will usually be issued at the same time as the initial hurricane watch or, in some cases, with a tropical storm watch.

The map is based on the latest forecast track and intensity for the tropical cyclone, and takes into account likely forecast errors.

The map shows inundation levels that have a 10 percent chance of being exceeded, and can therefore be thought of as representing a reasonable worst-case scenario for any given location.

The map is subject to change every six hours in association with every new NHC full advisory package. Due to the processing time required to produce the map, it will not be available until about 45 to 60 minutes following the advisory release. Read more.

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