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Severe Weather Data Inventory (SWDI)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: April 12, 2026 at 09:14 PM | Dataset Last Updated: January 01, 2006 at 12:00 AM
The Severe Weather Data Inventory (SWDI) is an integrated database of severe weather records for the United States. SWDI enables a user to search through a variety of source data sets in the NCDC (now NCEI) archive in order to find records covering a particular time period and geographic region, and then to download the results of the search in a variety of formats. The formats currently supported are Shapefile (for GIS), KMZ (for Google Earth), CSV (comma-separated), and XML. The current data layers in SWDI are: Storm Cells from NEXRAD (Level-III Storm Structure Product); Hail Signatures from NEXRAD (Level-III Hail Product); Mesocyclone Signatures from NEXRAD (Level-III Meso Product); Digital Mesocyclone Detection Algorithm from NEXRAD (Level-III MDA Product); Tornado Signature from NEXRAD (Level-III TVS Product); Preliminary Local Storm Reports from the NOAA National Weather Service; Lightning Strikes from Vaisala NLDN.

Resources

6 resources available

  • NCEI Dataset Landing Page

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  • NCEI Product Information Page

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  • NCEI GIS Map Service

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  • NCEI Direct Download (Dataset Files)

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  • The Severe Weather Data Inventory (SWDI): a Geospatial Database of Severe Weather Data at the NOAA National Centers for Environmental Information (NCEI)

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  • Global Change Master Directory (GCMD) Keywords

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