A more detailed analysis, may be required to determine the area’s actual susceptibility to flooding. The mapping may not accurately capture detailed hydrologic/hydraulic features such as canals, ditches, and stormwater infrastructure. They are determined solely by how well the elevation data captures the area’s drainage characteristics. Low-lying areas, displayed in green, are hydrologically 'unconnected' areas that may also flood. Areas that are hydrologically connected to the ocean are shown in shades of blue (darker blue = greater depth). Water levels are relative to local Mean Higher High Water Datum. Click on icons in the map to view sea level rise simulations at specific locations. Use the vertical slider to simulate water level rise, the resulting inundation footprint, and relative depth. Oregon and Texas – Marsh tab updated with 2010 Coastal Change Analysis Program (C-CAP) land cover data Tillamook Bay, OR – Added elevation data and remapped to fill data gap Palm City, FL – Fixed elevation model and remappedĬharles and Mystic Rivers near Boston, MA – Fixed elevation model and remapped to fix dam protected area North Carolina/South Carolina border – Remapped to fix edge matching issue Maryland/Delaware border – Remapped to fix edge matching issue. Texas City, TX – Remapped to fix leveed area Port Arthur, TX – Remapped to fix leveed areaįreeport, TX – Remapped to fix leveed area Virgin Islands – Remapped with new elevation data based on 2013 lidar from NOAA

San Francisco Bay, CA – Remapped to fix leveed areas. Northern South Carolina, North Carolina, Virginia, Maryland, Delaware, New Jersey, and New York – Remapped with new elevation data based on Post-Sandy lidar from USGS and NOAA National Geodetic Survey. The VDatum team is currently looking at resolving these uncertainties. These issues most likely can be attributed to subsidence, newly established datums, and changes to the understanding of NAVD88 based on new versions of the GEOID. Important – Transformation uncertainties in the 'Louisiana/Mississippi–Eastern Louisiana to Mississippi Sound' regional model have been found to range from 20 to 50 centimeters in particular locations from the Mississippi River Delta north to Lake Pontchartrain. San Francisco Bay - Remapped with updated VDatum tidal surface. Mississippi - Remapped with new elevation data. Oahu, Hawaii - Remapped with new elevation data. Virgin Islands - High tide flooding mapping added. Hawaii, Guam, Saipan, American Samoa, Puerto Rico, and the U.S. September 2018Īll locations - Source land cover data updated from 2006 to 2010.Īll locations - Sea level rise, mapping confidence, and marsh migration mapped to 10 feet. Washington – Eastern and southern Puget Sound counties remapped with new elevation data. Maryland – Northern and western Chesapeake Bay counties remapped with new elevation data. Pennsylvania – Remapped with new elevation data. March 2019Ĭonnecticut – Remapped with new elevation data. Maine – Remapped with new elevation data. New Hampshire – Remapped with new elevation data. Massachusetts – Remapped with new elevation data. Rhode Island – Remapped with new elevation data. Texas – Remapped with new elevation data. Louisiana – Remapped with new elevation data. South Carolina – Remapped with new elevation data. Washington – Eastern Puget Sound updated with new elevation data for Padilla Bay NERR and Skagit River Delta.įlorida – Remapped with updated VDatum tidal surface. High Tide Flooding Historical Yearly Inundation Events charts now updating dynamically and showing data through 2019. Users can now zoom in one more level under Sea Level Rise, Scenarios and High Tide Flooding.Īll locations – Photo simulations now have images for 7-10ft. New Jersey – Central and southern New Jersey remapped with new elevation data.

Virgin Islands – Remapped with new elevation data. Puerto Rico – Remapped with new elevation data. New DEM available.įlorida – Panhandle remapped with new elevation data. New sea level rise scenarios from the 2022 Sea Level Rise Technical Report are available under the Local Scenarios tab.Īlabama – Remapped with new elevation data.

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