First EF-4 Tornado in East Kansas, February 28, 2007 (VIDEO)

With the Fujita Scale obsolete, tornados are now measured by the Enhanced Fujita Scale (initiated February 1, 2007). Video helps point out an RFD (rear flank downdraft), gust-front, funnel and forming wall cloud. Then storm chasers proceed to nighttime tornados — two in the same night.

Video of daytime wall cloud, zippy scud clouds and a trailing shelf cloud; and two Eastern Kansas nighttime tornadoes on February 28 in Linn County (reported by TornadoVideodotnet).

Colony, Kansas: EF-1 tornado at 7:00 pm CST
Just northwest of Blue Mound, Kansas: EF-4 tornado at 7:24 CST and powerflash.