So far it looks like at least 3 EF5 tornados
Smithville, Mississippi,
Philadelphia, Mississippi,
and the Hamilton-Hackleburg(Alabama)-Huntland (Tennessee). Path length 172km, max width 2km - see the Noaa track
http://www.srh.noaa.gov/images/hun/stormsurveys/2011-04-27/tracks/marion-madison_track_1500.png
