NOAA – 600 tornadoes during the month of April 2011
NOAA April 2011 tornado information: “NWSs preliminary estimate is that there have been more than 600 tornadoes…during the month of April 2011…NOAA’s preliminary estimate is that there were 312 tornadoes during the entire outbreak from 8:00 a.m. EDT April 26 to 8:00 a.m. April 28, 2011…The largest previous number of tornadoes on record in one …