the midwest is bracing itself for worse to come after a monster storm impacted a 1,500-mile arc with 10 reported tornadoes , grapefruit-sized hail and winds of up to 80 mph on wednesday .
the storm system , which stretches from texas up to the great lakes and down to north carolina , has the potential to be the biggest severe weather event so far this spring .
hail of up to 4 inches in diameter and other big cities in the midwest later in the day .