A tornado slides across Oklahoma. Image courtesy NSSL/NOAA ... The strength of a tornado is measured by the Enhanced Fujita Scale (continue scrolling for information on the Enhanced Fujita ...

The U.S. recorded the most tornadoes in at least a decade this year. Researchers are trying to figure out why.

The National Weather Service confirmed Sunday that an EF-1 tornado touched down in Lacombe Saturday night. Peak winds were estimated at 90 mph. It was on the ground for only about a mile ...

Among Saturday's twisters, two EF-3 tornadoes tore across Southeast ... Specific details, such as path width and path length for each tornado, are also expected to become available this week.