Storm Surge Risk Areas

This data reflects areas with a risk of storm tide flooding from hurricanes, based on potential storm tide heights calculated by the National Weather Service's SLOSH (Sea, Lake, and Overland Surge from Hurricanes) Model. The SLOSH Basin used for mapping was Chesapeake Bay (CP5), released in 2014. This data was prepared by the U.S. Army Corps of Engineers, Baltimore District, Planning Division in January 2016. SLOSH storm tide elevations used for this mapping are based on the Maximum of Maximums (MOM) SLOSH output dataset. The MOM output elevations represent the highest calculated storm tide values based on thousands of SLOSH simulations using different combinations of approach direction, forward speed, landfall point, astronomical tide, and intensity (Category 1 through Category 4). Categories 1 through 4 refer to the Saffir-Simpson scale of hurricane intensity. This map does not reflect the expected storm tide flooding for every hurricane, or for any one particular type of hurricane. This map shows the overall footprint of the area that has some risk of storm tide flooding from hurricanes, based on the MOM output dataset.

Data and Resources

Field Value
accessLevel public
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier https://www.arcgis.com/home/item.html?id=a081c2756d844eb398de6ea4bf936ced&sublayer=36
issued 2015-02-27T20:55:54.000Z
landingPage https://opendata.dc.gov/datasets/DCGIS::storm-surge-risk-areas
license https://creativecommons.org/licenses/by/4.0
metadata_type geospatial
modified 2024-09-26T14:19:02.000Z
old-spatial -77.1192,38.8100,-76.9354,38.9348
publisher U.S. Army Corps of Engineers
resource-type Dataset
source_datajson_identifier true
source_hash 84249e989add2c1c3271367931061cb3307283d4b08ec5f0eef7e6f5836c12e6
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-77.1192, 38.8100], [-77.1192, 38.9348], [-76.9354, 38.9348], [-76.9354, 38.8100], [-77.1192, 38.8100]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • dc
  • district-of-columbia
  • doee
  • environment
  • fema
  • flood
  • hurricane
  • storm-surge
  • washington-dc
isopen True
license_id cc-by
license_title Creative Commons Attribution
license_url http://www.opendefinition.org/licenses/cc-by
maintainer DCGISopendata
maintainer_email gisgroup@dc.gov
metadata_created 2025-09-24T22:36:15.956383
metadata_modified 2025-09-24T22:36:15.956392
notes <div style='text-align:Left;'><div><div><p><span>This data reflects areas with a risk of storm tide flooding from hurricanes, based on potential storm tide heights calculated by the National Weather Service's SLOSH (Sea, Lake, and Overland Surge from Hurricanes) Model. The SLOSH Basin used for mapping was Chesapeake Bay (CP5), released in 2014. This data was prepared by the U.S. Army Corps of Engineers, Baltimore District, Planning Division in January 2016. SLOSH storm tide elevations used for this mapping are based on the Maximum of Maximums (MOM) SLOSH output dataset. The MOM output elevations represent the highest calculated storm tide values based on thousands of SLOSH simulations using different combinations of approach direction, forward speed, landfall point, astronomical tide, and intensity (Category 1 through Category 4). Categories 1 through 4 refer to the Saffir-Simpson scale of hurricane intensity. This map does not reflect the expected storm tide flooding for every hurricane, or for any one particular type of hurricane. This map shows the overall footprint of the area that has some risk of storm tide flooding from hurricanes, based on the MOM output dataset.</span></p></div></div></div>
num_resources 7
num_tags 17
title Storm Surge Risk Areas