A storm system consisting of strong winds, heavy rains and hail impacted areas of Wyoming, Colorado, Kansas and Missouri July 12 and 13, 2011. The winds and hail damaged roofing materials, decks, fences, glass and vehicles. The heavy rains resulted in water in homes. Additionally, there are some reports of lightning strikes. The primary counties impacted by this storm system are: Wyoming – Laramie; Colorado – Denver, Adams, Weld, Jefferson, Arapahoe, Elbert, Park; Kansas – Johnson, Douglas, Riley; Missouri – St. Louis, Caldwell, Jackson.