National Weather Service:

...STORMY WEATHER ON TODAY TO BE FOLLOWED BY UNSEASONABLY COLD AIR FOR THE WEEKEND...

A STRONG LOW PRESSURE SYSTEM OVER THE CENTRAL PARTS OF THE COUNTRY WILL MOVE NORTHEAST TODAY...AND WILL PUSH A STRONG COLD FRONT ACROSS THE TENNESSEE RIVER VALLEY TONIGHT. BREEZY SOUTH TO SOUTHWEST WINDS WILL DEVELOP ACROSS THE REGION AHEAD OF THIS COLD FRONT. SHOWERS AND THUNDERSTORMS WILL ALSO INCREASE IN COVERAGE BY THIS AFTERNOON AND EVENING AS THIS FRONT APPROACHES. A FEW STRONG TO SEVERE THUNDERSTORMS MAY DEVELOP...BRINGING THE POSSIBILITY OF DAMAGING WINDS...LARGE HAIL AND LOCALLY HEAVY RAINFALL.

UNSEASONABLY COLD AIR WILL THEN MOVE INTO THE REGION THIS WEEKEND AND LINGER INTO EARLY NEXT WEEK...WITH TEMPERATURES FALLING SOME FIFTEEN TO TWENTY DEGREES BELOW NORMAL BY MONDAY. IN FACT... TEMPERATURES COULD FALL TO AROUND FREEZING OR LOWER BY MONDAY AND TUESDAY MORNINGS ACROSS MUCH OF THE REGION. SCATTERED SHOWERS WILL BE POSSIBLE FROM SATURDAY NIGHT THROUGH MONDAY NIGHT...ESPECIALLY DURING THE AFTERNOON AND EVENING HOURS. SOME SNOW SHOWERS WILL ALSO BE POSSIBLE ACROSS THE HIGHER ELEVATIONS...ESPECIALLY DURING THE NIGHTTIME HOURS. SOME LIGHT SNOW ACCUMULATIONS WILL ALSO BE
POSSIBLE ACROSS THE MOUNTAINS.