Data Release
Storm-Induced Overwash Extent
By Kara S. Doran,1 Justin J. Birchler,1 and Kirsten J. Bendik2
1 U.S. Geological Survey, St. Petersburg, Florida
2 Formerly U.S. Geological Survey
Summary
The Coastal Change Hazards Technical Capabilities and Applications project at the U.S. Geological Survey (USGS) exists to understand and predict storm impacts to our nation’s coastlines. This data release defines the alongshore extent of overwash deposits, determined from aerial photograph analysis, attributed to coastal processes during storm events.
Note: This data release was versioned on December 03, 2025. Please see the Suggested Citation section for details.
Data
| File Name and Description | Metadata (XML format) | Metadata (text format) | Download File |
|---|---|---|---|
| Matthew_Overwash_Extent.zip Extent of overwash sediments deposited along the southeast coast of the United States from Florida to North Carolina and attributed to coastal processes during [Atlantic Basin] Hurricane Matthew, which made landfall in the U.S. on October 08, 2016 (.shp, .kmz) |
Matthew_Overwash_Extent_metadata.xml | Matthew_Overwash_Extent_metadata.txt | Matthew_Overwash_Extent.zip (50 KB) |
| Irma_Overwash_Extent.zip Extent of overwash sediments deposited along the southeast coast of the United States in Florida and attributed to coastal processes during [Atlantic Basin] Hurricane Irma, which made landfall in the U.S. on September 9, 2017 (.shp, .kmz) |
Irma_Overwash_Extent_metadata.xml | Irma_Overwash_Extent_metadata.txt | Irma_Overwash_Extent.zip (17 KB) |
| Florence_Overwash_Extent.zip Extent of overwash sediments deposited along the southeast coast of the United States from North Carolina to Virginia and attributed to coastal processes during [Atlantic Basin] Hurricane Florence, which made landfall in the U.S. on September 14, 2018 (.shp, .kmz) |
Florence_Overwash_Extent_metadata.xml | Florence_Overwash_Extent_metadata.txt | Florence_Overwash_Extent.zip (72 KB) |
| Michael_Overwash_Extent.zip Extent of overwash sediments deposited along the southeast coast of the United States in Florida and attributed to coastal processes during [Atlantic Basin] Hurricane Michael, which made landfall in the U.S. on October 10, 2018 (.shp, .kmz) |
Michael_Overwash_Extent_metadata.xml | Michael_Overwash_Extent_metadata.txt | Michael_Overwash_Extent.zip (76 KB) |
| Laura_Overwash_Extent.zip Extent of overwash sediments deposited along the southeast coast of the United States in Florida and attributed to coastal processes during [Atlantic Basin] Hurricane Laura, which made landfall in the U.S. on August 27, 2020 (.shp, .kmz) |
Laura_Overwash_Extent_metadata.xml | Laura_Overwash_Extent_metadata.txt | Laura_Overwash_Extent.zip (24 KB) |
| Sally_Overwash_Extent.zip Extent of overwash sediments deposited along the southeast coast of the United States in Florida and attributed to coastal processes during [Atlantic Basin] Hurricane Sally, which made landfall in the U.S. on September 16, 2020 (.shp, .kmz) |
Sally_Overwash_Extent_metadata.xml | Sally_Overwash_Extent_metadata.txt | Sally_Overwash_Extent.zip (22 KB) |
| Delta_Overwash_Extent.zip Extent of overwash sediments deposited along the southeast coast of the United States in Florida and attributed to coastal processes during [Atlantic Basin] Hurricane Delta, which made landfall in the U.S. on October 9, 2020 (.shp, .kmz) |
Delta_Overwash_Extent_metadata.xml | Delta_Overwash_Extent_metadata.txt | Delta_Overwash_Extent.zip (44 KB) |
| Zeta_Overwash_Extent.zip Extent of overwash sediments deposited along the southeast coast of the United States in Florida and attributed to coastal processes during [Atlantic Basin] Hurricane Laura, which made landfall in the U.S. on October 28, 2020 (.shp, .kmz) |
Zeta_Overwash_Extent_metadata.xml | Zeta_Overwash_Extent_metadata.txt | Zeta_Overwash_Extent.zip (35 KB) |
| Isaias_Overwash_Extent.zip Extent of overwash sediments deposited along the southeast coast of the United States in North Carolina and South Carolina and attributed to coastal processes during [Atlantic Basin] Hurricane Isaias, which made landfall in the U.S. on August 4, 2020 (.shp, .kmz) |
Isaias_Overwash_Extent_metadata.xml | Isaias_Overwash_Extent_metadata.txt | Isaias_Overwash_Extent.zip (32 KB) |
| Ian_Overwash_Extent.zip Extent of overwash sediments deposited along the southeast coast of the United States in Florida and attributed to coastal processes during [Atlantic Basin] Hurricane Ian, which made landfall in the U.S. on September 28, 2022 (.shp, .kmz) |
Ian_Overwash_Extent_metadata.xml | Ian_Overwash_Extent_metadata.txt | Ian_Overwash_Extent.zip (17 KB) |
Figure 1. Location map (purple lines) showing the areas where overwash extent data were collected for Hurricanes Matthew, Irma, Florence, Michael, Laura, Sally, Delta, Zeta, Isaias, and Ian in the southeastern coasts of the United States.
Suggested Citation
Doran, K.S., Birchler, J.J., and Bendik, K.J., 2019, Storm-induced overwash extent (ver. 4.0, December 2025): U.S. Geological Survey data release, https://doi.org/10.5066/P9BW6CG6.
First posted August 13, 2019
Revised September 16, 2021
Revised June 11, 2024
Revised December 03, 2025