Enhanced Fujita Scale

[Jimmy Dewitt]

I have been around storm spotting and chasing for many years but this is a new one on me. NWS Cleveland officially rated one of the NW Ohio tornadoes on March 14 as a EFU, undetermined. I never saw this term used before.

 

[Mike Smith]

It is new. It is used when a tornado occurs that struck nothing with a DI (damage indicator).