ESPECIALLY AFTER LAST YEAR’S TORNADO OUTBREAKS. SO LET’S START WITH OUR SURFACE WINDS MOVING ONE DIRECTION AT ONE SPEED, THEN ADDING STRONGER UPPER LEVEL WINDS. WE’LL WATCH THESE MOVE A ...

Still, scientists have uncovered key clues about how these powerful forces emerge from severe thunderstorms. Tornadoes don't just appear out of nowhere. They need the perfect storm to form. It starts ...

Here's more about Ohio's tornado season and how tornadoes are formed. Start the day smarter. Get all the news you need in your inbox each morning. Risk of flooding in Ohio: How to stay safe ...

The unstable air mass creates strong updrafts, while wind shears further increase the strength of the updraft and promote the rotation of tornadoes. These start out horizontally and then drop down ...

The original “Fujita Scale” or “F-scale” was used until 2007, when tornado ratings switched to the Enhanced Fujita scale.

Since “Twister,” scientists have gained a fair understanding of how the rotation of a tornado starts and its basic ingredients. Because of this, warning times have steadily improved.

Storms that killed at least 21 people across the heart of the nation unleashed what was likely a violent and long-lived tornado across Kentucky, a state that accounted for at least 14 of those deaths.