Tornadoes are the most violent storms on Earth. As such a tornado will usually be the most violent part of its parent storm.
The year with the most violent tornadoes on record was 1974, with a total of 36 tornadoes rated as violent.
The record for tornadoes in a single month (at least for the U.S.) is April of 2011 with about 750 tornadoes. Tornado activity usually peaks in May.
Most violent tornadoes (F4 and F5) occur in the months of March-June.
The most violent tornadoes generally occur in North America.
Tornadoes
Tornadoes occur in all months, but activity most often peaks in May.
Violent tornadoes have been recorded in most states east of the Rockies. However, most of the violent tornadoes occur on the Great Plains in the central part of the country.
A tornado is a violent weather event the most violent in fact. Tornadoes are produce by thunderstorms and are, in simple terms, extremely violent rotating windstorms.
All tornadoes are considered a violent weather events in general terms. However, less than 1% of tornadoes attain a violent rating of EF4 or EF5 on the Enhanced Fujita scale.
The peak month for tornadoes in Minnesota is June.
Tornado activity in the central U.S. usually peaks in May.