Surprising Hail Facts

  • Hail storms occur in all 50 US States each year, but are most prevalent in states east of the Rocky Mountains.

  • 65% of hail falls outside the typical 8-5 work week while managers are off work.

  • Hail forms as a result of strong updrafts inside supercell storms. These updrafts repeatedly lift hail stones up through layers of super cooled moisture which freezes on the stones causing them to grow.

  • The largest hail stone recorded to date fell in Vivian, SD on July 30, 2010. It measured 8” in diameter, 18.5” in circumference, and weighed almost 2 pounds. Hail stones of this size are extremely rare.