The following data sets are supported:
NEXRAD level III tornado vortex signatures
NEXRAD level III mesocyclone signatures
NEXRAD level III digital mesocyclone detection algorithm
NEXRAD level III hail signatures
NEXRAD level III storm cell structure information
Preliminary local storm reports
Severe thunderstorm, tornado, flash flood, and special marine warnings
To display details about the available inventory for the NEXRAD level III data sets, enter the following URL in your browser:
http://www.ncdc.noaa.gov/swdiws/xml
The result is a list of available SWDI web service data sets, each with a description, begin date, end date, tile summary allowed (yes or no), and ID query allowed (yes or no). The web page at the following URL describes the column definitions and units for each NEXRAD III product and includes a discussion about accuracy: