Map shows where in the US is most at risk of tornados this season
Tornado probability estimated by the National Oceanic and Atmospheric Administration from severe weather reports from 1982-2011 (Picture: Getty Images/Metro.co.uk graphic)Tornadoes wrecked deadly havoc on numerous US states over the weekend and the worst may be yet to come, as twister season continues for another few months.Powerful storms brought tornadoes to Nebraska and Iowa on Friday and Saturday, and twisters tore down towns in Oklahoma on Sunday.A tornado ‘is a narrow, violently rota