Under the Enhanced Fujita scale, there are seven categories of storm. The lowest category is EFU, which is used for storms that don't have enough data or cause enough damage to be classified.

How does the National Weather Service confirm if a tornado actually touched the ground after they issue a Tornado Warning?

More than 10 tornadoes were recorded in central Illinois on Wednesday, according to the National Weather Service. Find out ...

The Enhanced Fujita Scale became operational on February 1, 2007. It was designed to rate tornadoes based on estimated wind speeds and related damage. The strength of a tornado has nothing to do ...

This is the time of year, when Texas sees more severe thunderstorms that can spawn tornadoes, you might hear more about where a twister ranked on the Enhanced Fujita scale or its EF rating.Among ...

The Enhanced Fujita scale is used to rate tornadoes. Following tornadic storms Sunday in Denver, the National Weather Service will conduct storm surveys to determine their intensity and path length.

Considering these key indicators, the SAWS concluded that the oThongathi tornado can be rated as an EF3 on the Enhanced Fujita scale, with estimated wind speeds of 225 to 265 km/h that occurred ...

Five ‘strong’ EF3 tornadoes tore through Kansas on Sunday night. While the tornadoes may have had winds close to 200 mph, they passed over largely rural areas.

Wednesday's night's twister was the state's 29th tornado so far this year. Most have been weak spin-up tornadoes during ...