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|snippet:||This nowCOAST map service depicts the latest NWS Potential Storm Surge Flooding Map.|
|summary:||This nowCOAST map service depicts the latest NWS Potential Storm Surge Flooding Map.|
|accessInformation:||NOAA/NOS/OCS nowCOAST and NOAA/NWS/NHC|
|typeKeywords:||["Data","Service","Map Service","ArcGIS Server"]|
Last Revised: February 2018
This nowCOAST™ map service provides maps depicting the latest official NWS Potential Storm Surge Flooding Map for any significant landfalling tropical cyclone expected to impact the Atlantic or Gulf of Mexico Coasts of the Contiguous United States. The map layers depict the risk associated with coastal flooding from storm surge associated with tropical cyclones.
The Potential Storm Surge Flooding Map depicts the geographical areas where inundation from storm surge could occur along with the heights, above ground, that water could reach in those areas. These potential heights are represented with different colors based on water level: 1) Greater than 1 foot above ground (blue), 2) Greater than 3 feet above ground (yellow), 3) Greater than 6 feet above ground (orange), and 4) Greater than 9 feet above ground (red). Two versions of this graphic are provided in this map--one with a mask (depicted in gray) identifying Intertidal Zone/Estuarine Wetland areas, and another version without the mask where Intertidal Zone/Estuarine Wetland areas are symbolized with the same colors as other areas.
Two additional layers are provided to depict 1) the full geographic extent for which the Potential Storm Surge Flooding Map is presently valid (the "map boundary"), and 2) Levee Areas, if any, within the affected area (symbolized with a black-and-white diagonal hatch pattern).
If the Potential Storm Surge Flooding Map is not presently active, all layers will be blank except for the Map Boundary layer, which will display a shaded region indicating the coverage area for any potential future graphics along with a text label indicating that the map is not presently active.
This map service is updated approximately every 10 minutes on nowCOAST™ to ensure the latest information is provided to the user as soon as it becomes available. Once issued, the Potential Storm Surge Flooding Map will be updated by NHC every six hours alongside each new Forecast Advisory for the associated tropical cyclone. However, due to processing requirements during the creation of this product, the flooding map becomes available approximately 60 to 90 minutes following the release of the associated NHC Forecast Advisory, at which point nowCOAST™ will acquire it and update this map service within the next 10 to 20 minutes (i.e., this product will be updated on nowCOAST™ within approximately 70 to 110 minutes after the associated Forecast Advisory is released). For more detailed information about layer update frequency and timing, please reference the nowCOAST™ Dataset Update Schedule.
Developed by National Hurricane Center (NHC) over the course of several years in consultation with social scientists, emergency managers, broadcast meteorologists, and others, the Potential Storm Surge Flooding Map is intended to depict the risk associated with coastal flooding from storm surge associated with tropical cyclones. On June 1, 2016 it became an operational product, issued on demand for certain tropical cyclones that are expected to affect the Atlantic and Gulf Coasts of the United States. The product is not available for tropical cyclones that may affect coastal areas in the Eastern or Central Pacific regions.
From the NHC Website:
This nowCOAST™ map service is not time-enabled.
|licenseInfo:||For public use|
|tags:||["storm surge","inundation","flooding","forecast","advisory","tropical cyclone","hurricane","tropical storm","tropical depression","coastal flooding","coastline","NWS","NCEP","NHC","SSU","North Atlantic","Gulf of Mexico","Caribbean Sea"]|