HALEY: THE STORM SYSTEM WAS JUST INCREDIBLE TO WATCH, LOOKING BACK AT THE RADAR IMAGERY.

THE SIGNATURE THAT WE LOOK FOR ON THE RADAR WAS THERE, AND FOR A LONG TIME, ALMOST ALL THE WAY ACROSS THE STATE OF TENNESSEE, THIS TORNADO MAY HAVE BEEN ON THE GROUND FOR A VERY LONG TIME.

KEEP IN MIND THE TIMESTAMP.

THIS IS FOR OUR TIME, SO YOU WOULD HAVE TO SUBTRACT ONE HOUR.

IT CAME THROUGH OVERNIGHT, WHICH IS NEVER A GOOD THING.

PEOPLE ARE ASLEEP, THEY DON’T HAVE ADEQUATE WAYS TO BE WARNED.

JUST NORTH OF DIXON, THERE IS A LITTLE BEND IN THE PRECIPITATION, TYPICALLY WHAT WE CALL A HOOK ECHO.

IT TELLS US THAT THERE COULD BE A TORNADO WITHIN THAT CELL.

WATCH AS IT MOVES CLOSER AND CLOSER TO NASHVILLE, BASICALLY PASSES JUST TO THE NORTH OF THE IMMEDIATE CITY CENTER, BUT HAS THAT VERY WELL-DEFINED HOOK ECHO.

WE HAVE ALSO BEEN ABLE TO SEE THAT THERE WAS LIKELY DEBRIS IN THAT, AND IT CONTINUED TO MOVE OFF TOWARD THE EAST.

THIS IS THE PROJECTED PATH.

COULD BE OVER 100 MILES IT WAS ON THE GROUND, POSSIBLY FOR OVER ONE HOUR.

NATIONAL WEATHER SERVICE METEOROLOGIST ARE ON SEE IT TODAY AND THEY WILL DETERMINE HOW STRONG IT REALLY WAS.

WE ARE STILL CONTINUING TO TRACK ACTUALLY SOME RAIN MOVING THROUGH THAT AREA AND THANKFULLY, THE TORNADO THREAT HAS DIMINISHED.

AS METEOROLOGISTS HERE, AND YOU USED TO WORK IN NASHVILLE, A VERY SCARY SITUATION.

SEAN: AND YOU COMPARE THAT TO 50 MILES WHICH OCCURRED HERE IN 2008.

IF THAT WAS ON THE GROUND FOR THAT SIGNIFICANT AMOUNT OF TIME, THAT IS A VERY LARGE STORM, TO SAY THE LEAST.

HAYLEY: OVERNIGHT AND ALSO HAPPENING IN A POPULATED AREA.

SE