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SVRGIS (Updated: March 18, 2015).

Welcome to the SVRGIS page for the SPC. This page has the United States severe report database (tornadoes 1950-2014, hail/wind 1955-2014), converted into shapefile (.shp) file format as well as a Geographic Information System (GIS) database. The data can be viewed in graphical, tabular, and statistical formats depending on end-user programs.

The NOAA/NWS Geodata page, has links that are directed to free, easy-to-use GIS viewing programs.

The data originate from the comma separated value (.csv) files available at:

The column headings are the same as those described in this document:

Location Codes for Storm data here.

Map of State FIPS Numbers here.

Text list of County FIPS Numbers here.

The data were prepared in a USA Contiguous Lambert Conformal Conic projection with North American Datum 1983. The data are contained in zip files and can be quite large, up to around 55MB (i.e. Click here to download the 2015 update which contains a prepared .mxd file as a base template for users with programs capable of viewing .mxd files. An instructional manual is provided on how to build and develop a basic severe weather report GIS database in ArcGIS.

If you have comments regarding this information, contact Bryan Smith or Patrick Marsh of the Storm Prediction Center.

Tornadoes (1950-2014), Wind/Hail (1955-2014)
Preliminary SVRGIS 1950 - 2014 tornado image
Preliminary SVRGIS Hail 1955 - 2014 image
Preliminary SVRGIS Wind 1955 - 2014 image
Additional Images
Mobile Home Density
Additional Information
Additional compressed files and information:
Instruction Manual NWS County Warning Areas Counties | Cities | States
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Page last modified: March 23, 2015
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