National Weather Service United States Department of Commerce

Information Concerning the
Spencer, South Dakota Tornado

Official NWS Statements, Reports, and Images:

Input within the Meteorological Community:


Please note:  Interpretation of meteorological data will vary among individual researchers.  The provided links are to early research distributed shortly after the Spencer Tornado.  Information contained through the provided links (for example, timing, storm intensities, cause) should be considered preliminary until the meteorological community as a whole has more time to review the data and reach a consensus on the different meteorological aspects of this particular storm.