Our first tornado in South Dakota!

Michael and I decided we would take the favorable I-29 south in front of the squall line and see what we could find. Just south of Bereford, SD in Union County 8:18pm CDT we drove right up on a large dusty tornado that developed right over the highway (where it tossed a 2000 gallon water tank). We pulled over and filmed it as it spun off to our east and then dissipated after 5 minutes or so and we were overtaken by the squall line. A nice little surprise non-supercellular tornado that seemed to have formed in the comma/forward bow of the squall-line. :)


Developing tornado as seen looking southeast from I-29


Tornado at it's strongest, east of the interstate


Tornado about to dissipate and we are overtaken by the squall-line and we lose it in the rain!