EFU stands for Enhanced Fujita Unknown, meaning that the damage is too minimal to determine a rating or there's no assessable damage.

The National Weather Service has confirmed a weak tornado touched down in Switzerland County, Indiana, on Sunday evening.

Many people in Story County woke up to a tornado warning early Saturday morning. Monday afternoon, the National Weather ...

In a damage report, the NWS said a "very weak tornado" traveled around two-thirds of a mile in Patriot, Indiana, at about 4:30 p.m. Sunday.