One of the worst tornadoes on record was in Massachusetts. Where was it? Have there been any other notable twisters in the Bay State over the years?

A radar image of the supercell that produced a mile-wide F5 tornado near Oklahoma City on May 3, 1999. | Image: Gibson Ridge Tornadoes usually form in the “hook echo” of a supercell, which is ...

The April 3rd and 4th, 1974 super outbreak is the second largest outbreak of tornadoes on record and holds the record for the most F5 tornadoes on a single day: 7. At least 148 tornadoes developed ...

A violent thunderstorm that developed over northwestern Wyoming on the afternoon of July 21, 1987, produced a tornado high in the mountains above Yellowstone National Park. The twister was enormous, ...

40 years since Pennsylvania's deadliest tornado outbreak 21 tornadoes crossed the Keystone State, including the first and only F5.

The 1974 Super Tornado Outbreak is known as the worst tornado outbreak in U.S. history — and the second largest. Within 24 hours, 148 tornadoes swept across the U.S.

2011 Super Outbreak During the largest tornado outbreak ever recorded, with storms ranging from Texas to New York to Southern Canada, some of the worst damage came in Mississippi.

Through this, tornado severity is ranked from F1 to F5 (the "F" stands for Fujita), with F5 being the worst on the scale. An F5 is the most powerful level for a tornado.

How are tornadoes measured? They are measured through what's called the Fujita Scale. Through this, tornado severity is ranked from F1 to F5 (the "F" stands for Fujita), with F5 being the worst on ...

The Fujita Scale wasn't in use yet, but meteorologists believe it was an F4 and likely reached F5 intensity in some locations. The tornado brought hailstones the size of baseballs and winds ...