Understanding the distribution and frequency of tornado intensities is crucial for preparedness and mitigation efforts.

An early season tornado touched down about 175 kilometres southeast of Calgary on Saturday.It's the first tornado recorded in ...

Environment Canada has given it a preliminary rating of EF-0 — the weakest rating on the scale it uses to rate tornado intensity. Alberta prepares as wildfire season begins No damage has been ...

A tornado of F1 intensity briefly touched down near Bentheim and Burnips, north of Allegan. It killed one person, injured nine and caused $500,000 in damage — about $8.2 million today.

The worst impacts from ex-tropical Cyclone Tam’s ferocious storm-force winds are tipped for later today, with wild conditions ...

Above: Damage from an F4 tornado that tore through the heart of ... Fujita (University of Chicago), who co-developed the Fujita intensity scale with Allen Pearson. The first incarnation of ...

Texas sees an average of 135 tornadoes each year, the most of any U.S. state. Here's a look at the worst ones in the Lone ...