Hail Storm Resources
Interactive Hail Maps http://www.interactivehailmaps.com/
Weather Undergroundhttp://www.wunderground.com/resources/severe/hail.asp
National Geographic http://education.nationalgeographic.com/education/encyclopedia/hail/?ar_a=1
NOAA National Severe Storms Laboratory http://www.nssl.noaa.gov/research/hail/
Insurance Institute for Business & Home Safety http://www.disastersafety.org/hail/