Archived NEXRAD Storm Attributes Shapefiles
The IEM attempts to process and archive the Storm Attribute Table that is produced by the RADARs that are a part of the NEXRAD network. This page allows you to selectively download these attributes from the IEM database in shapefile format. Holes do exist in this archive! If you find a data hole and would like it filled, please let us know.
The archive behind this application is large, so please be patient after clicking the Givme button below. If you request all RADARs, you can only request up to seven days worth of data. If you can request a single RADAR, there is no date restriction, but the download will be slow!
Shapefile DBF schema:
Field 0: Type=C/String, Title='VALID', Timestamp in UTC Field 1: Type=C/String, Title='STORM_ID', 2 character Storm ID Field 2: Type=C/String, Title='NEXRAD', 3 character NEXRAD ID Field 3: Type=N/Integer, Title='AZIMUTH', Azimuth of storm in degrees from North Field 4: Type=N/Integer, Title='RANGE', Range of storm in miles from RDA Field 5: Type=C/String, Title='TVS', Tornado Vortex Signature Field 6: Type=C/String, Title='MESO', Mesocyclone strength (1=weak,25=strongest) Field 7: Type=N/Integer, Title='POSH', Probability of Hail Field 8: Type=N/Integer, Title='POH', Probability of Hail Field 9: Type=N/Double, Title='MAX_SIZE', Maximum Hail Size inch Field 10: Type=N/Integer, Title='VIL', Volume Integrated Liquid kg/m3 Field 11: Type=N/Integer, Title='MAX_DBZ', max dbZ Field 12: Type=N/Double, Title='MAX_DBZ_H', Height of Max dbZ in thousands of feet Field 13: Type=N/Double, Title='TOP', Storm Top in thousands of feet Field 14: Type=N/Integer, Title='DRCT', Motion Direction degrees from North Field 15: Type=N/Integer, Title='SKNT', Speed in knots Field 16: Type=N/Double, Title='LAT', Latitude Field 17: Type=N/Double, Title='LON', Longitude
- Data is missing June 2007 to March 2008
- Data is missing November 2008 to March 2009
Attribute Speed & Direction Histograms
Based on the archive built by the IEM, the following are 2-D Histograms comparing RADAR storm attribute speed, direction of travel, and day of the year. A direction of "west" would represent a storm moving from west to east.