NWS’s preliminary estimate is that there have been more than 600 tornadoes thus far during the month of April 2011.

• The previous record number of tornadoes during the month of April was 267 tornadoes set in April 1974.

• The previous record number of tornadoes during any month was 542 tornadoes set in May 2003.

• The average number of tornadoes for the month of April during the past decade is 161.

• The overall monthly average number of tornadoes for the past decade is 106.

2011 Year-to-Date (and record annual) Statistics

NWS’s preliminary estimate is that there have been 835 tornadoes so far this year.

• The previous yearly record number of tornadoes was set in 2004 with 1,817.

• May is historically the most active month for tornadoes.

• The overall yearly average number of tornadoes for the past decade is 1274.