Measuring tornado winds at the ground level is notoriously difficult. Instead, meteorologists look at the damage, using on or more of 28 key indicators to determine how strong the tornado likely was ...

Around 1,200 tornadoes occur on average in the United States each year and every one of them gets its own rating on the Enhanced Fujita Scale.

You’ve seen photos and video footage of ominous-looking tornadoes ripping through cities, launching cars through the air and leveling houses. But how much do you know about how a twister’s strength is ...

Add Yahoo as a preferred source to see more of our stories on Google. Derek Kevra explains how the newer EF scale ranks a tornado as opposed to the old F scale that was replaced. Is it Shark Week? The ...

BUFFALO, N.Y. (WIVB) — When a tornado tears through an area, the main question after the fact is, “How strong was it?” That’s where the Enhanced Fujita Scale, more commonly known as the EF scale, ...

Measuring the strength of a tornado can be difficult based on sight alone, and weather instruments could easily be damaged by the strong winds. The Enhanced Fujita scale (EF-Scale) looks at the damage ...