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CoastalFlooding/StormSurge (MapServer)

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Service Description: Sandy surge extent is based on Final High Resolution (3 and 1 meter) Hurricane Sandy Storm Surge Extents, Field Verified HWMs and SSs from FEMA MOTF.

The Sea, Lake and Overland Surges from Hurricanes (SLOSH) model is a computerized numerical model developed by the National Weather Service (NWS) to estimate storm surge heights resulting from historical, hypothetical, or predicted hurricanes by taking into account the atmospheric pressure, size, forward speed, and track data. Maximum of Maximum or Maximum of MEOWs (MOM) SLOSH data is used. A MEOW is defined as a Maximum Envelope of Water, which is generated by compositing several hypothetical SLOSH runs, each of which has the same category, forward speed and direction. The MOM is created by compositing MEOWs of the same category hurricane, and plotting the maximum surge for that category. The SLOSH data is obtained as a shapefile in polygon format. The SLOSH data is then interpolated by a process agreed upon by USACE and NOAA. This process results in a SLOSH grid that can be compared to the elevation grid. Digital elevation data is collected and an elevation surface created. A grid is created that displays the difference in the elevations of the specified category SLOSH grid and the elevation surface. This file, which is derived from the depth grid, shows inundation depths in the following ranges: 0-3 feet, 3-6 feet, 6-9 feet, greater than 9 feet.

For a better understanding of the limitation of SLOSH please visit:

This data is to be used for hurricane planning and preparedness ONLY. This data should NOT be used to support engineering analysis and studies.

Map Name: Layers


All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers: Description:

Copyright Text:

Spatial Reference: 102100  (3857)

Single Fused Map Cache: false

Initial Extent: Full Extent: Units: esriMeters


Document Info: Supports Dynamic Layers: true

MaxRecordCount: 1000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, AMF, geoJSON

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true

Child Resources:   Info   Dynamic Layer

Supported Operations:   Export Map   Identify   QueryDomains   Find   Return Updates