wind tunnel test

Chicago Ground Hog Day 2011 Blizzard – Envision the Wind     On February 1, 2011 at about 3pm, a somewhat rare occurrence took place in Chicago. A real-life blizzard! It continued for 20 hours. Contrary to the misconceptions of some, a blizzard is not distinguished by a large volume of snow, but rather by an intense and pervasive wind. In order to achieve the…