How does hail form? ABC13 Meteorologist Kevin Roth explains that it all starts with a thunderstorm.HOUSTON, Texas (KTRK) -- In Texas, we are very familiar with hail. So how does it form?ABC13 Meteorologist Kevin Roth explains that it starts with a thunderstorm. Watch the video above.Follow Kevin Roth on Facebook, Twitter and Instagram.Fill out the form below if you would like to suggest a topic for our weather team to cover. Report a correction or typo