June 7 Tornado/Wind Survey for Dallas/Polk Counties

The National Weather Service office out of Des Moines issued their public information statement regarding the tornado reports and damaging wind reports that were received as a severe and tornadic thunderstorm moved across Dallas and Polk counties on Sunday evening. The results of the survey indicated that a brief EF-0 tornado occurred south/southeast of Dallas Center. The tornado length was 1.5 miles long, with an average width of 100 yards; the tornado damage path was concentrated within a path of straight line winds which began near Adel and continued northeast. The reports of a tornado near the town of Grimes was investigated and the NWS determined that this was a results of straight line winds that occurred on the southern periphery of the supercell's mesocyclone. A nice image that the Des Moines NWS has posted to their website is below:




To read more details and the complete public information statement please view the survey link: Adel to Grimes Wind Damage Survey