UPDATE:  Winter Weather Advisory Till Midnight for counties below in purple: (Now including Nashville Metro)

600 AM CST FRI JAN 6 2017

...ACCUMULATING SNOW POSSIBLE TODAY AND TONIGHT...

.TWO ROUNDS OF SNOW WILL BE POSSIBLE ACROSS MIDDLE TENNESSEE
TODAY AND CONTINUE THROUGH TONIGHT. FIRST ROUND OF SNOW WILL
BEGIN ACROSS AREAS ALONG AND SOUTH OF INTERSTATE 40 THIS MORNING
AND CONTINUE THROUGH EARLY AFTERNOON. A BRIEF LULL IN THE SNOW
WILL OCCUR THIS AFTERNOON BEFORE LIGHT SNOW RETURNS THIS EVENING
BRINGING ADDITIONAL ACCUMULATIONS ESPECIALLY FOR THE PLATEAU.
TOTAL SNOWFALL ACCUMULATIONS ON THE ORDER OF 0.5 TO 2 INCHES WILL
BE POSSIBLE WITH POTENTIALLY HIGHER AMOUNTS ACROSS THE PLATEAU.

TNZ011-023>028-030>034-061900-
/O.EXA.KOHX.WW.Y.0002.170106T1200Z-170107T0600Z/
PICKETT-HOUSTON-HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-SMITH-
JACKSON-PUTNAM-OVERTON-FENTRESS-
INCLUDING THE CITIES OF...BYRDSTOWN...ERIN...WAVERLY...
NEW JOHNSONVILLE...MCEWEN...DICKSON...ASHLAND CITY...
KINGSTON SPRINGS...NASHVILLE...LEBANON...MOUNT JULIET...
CARTHAGE...SOUTH CARTHAGE...GORDONSVILLE...GAINESBORO...
COOKEVILLE...LIVINGSTON...JAMESTOWN...ALLARDT
600 AM CST FRI JAN 6 2017

...WINTER WEATHER ADVISORY IN EFFECT UNTIL MIDNIGHT CST TONIGHT...

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL MIDNIGHT CST
TONIGHT.

* TIMING...TWO ROUNDS OF SNOW ARE EXPECTED TODAY AND TONIGHT.

* FIRST ROUND...SNOW WILL BEGIN THIS MORNING AND CONTINUE THROUGH
AROUND 1PM.

* SECOND ROUND...ACCUMULATING SNOW MAY RETURN THIS
EVENING...MAINLY FOR EASTERN AREAS AND ON THE PLATEAU. 

* MAIN IMPACT...SLICK ROADS ESPECIALLY ACROSS BRIDGES AND 
OVERPASSES. 

* SNOW ACCUMULATIONS...TOTAL SNOWFALL ACCUMULATIONS OF 0.5 TO 1
INCH WILL BE POSSIBLE WITH LOCALLY HIGHER AMOUNTS POSSIBLE
ACROSS THE PLATEAU.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

 Radar as of 8:20am:

Light to moderate snow continues to fall across most of middle Tennessee this morning...and will continue through the afternoon.  Totals up to 2 inches are possible by days end.

Late Night Radar Loop (As of 12:55am)

Snow across Oklahoma and Arkansas will spread east in to west Tennessee through early morning.  Totals will generally be under an inch...but most areas from Nashville south and east will have the greatest potential to see measurable snow.  Keep in mind with temperatures below freezing at the surface...Any snow that falls...will stick.. and untreated roads will quickly become problematic.  

1003 PM CST THU JAN 5 2017

TNZ005>011-023>034-056>066-075-077>080-093>095-061100-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-HOUSTON-
HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE-SMITH-
JACKSON-PUTNAM-OVERTON-FENTRESS-PERRY-HICKMAN-LEWIS-WILLIAMSON-
MAURY-MARSHALL-RUTHERFORD-CANNON-DE KALB-WHITE-CUMBERLAND-BEDFORD-
COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE-GILES-
1003 PM CST THU JAN 5 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF MIDDLE
TENNESSEE.

.DAY ONE...TONIGHT

ALTHOUGH ONLY A LIGHT DUSTING TO A FEW TENTHS OF AN INCH OF SNOWFALL
FELL THIS EVENING ACROSS MIDDLE TENNESSEE...SOME ROADS...ESPECIALLY
NON TREATED AND SECONDARY ONES...ALONG WITH BRIDGES AND OVERPASSES...
HAVE BECOME SLICK AND HAZARDOUS. PLEASE EXERCISE CAUTION WHILE
DRIVING ON AREA ROADWAYS THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

ANOTHER ROUND OF LIGHT SNOW SHOWERS WILL OCCUR WITH SNOWFALL
ACCUMULATIONS POSSIBLE ACROSS MAINLY SOUTHERN AND EASTERN
PORTIONS OF MIDDLE TENNESSEE THROUGH FRIDAY NIGHT. ALSO...WITH
TEMPERATURES EXPECTED TO REMAIN BELOW FREEZING...ANY MOISTURE
ON AREA ROADWAYS COULD QUICKLY FREEZE AND AT LEAST ON NON TREATED
AND SECONDARY ROADWAYS...AS WELL AS BRIDGES AND OVERPASSES...
RESULT IN THESE ROADS BECOMING SLICK AND HAZARDOUS.

.SPOTTER INFORMATION STATEMENT...

REPORTS OF ACCUMULATING SNOWFALL...ESPECIALLY GREATER THAN ONE
HALF OF AN INCH...ARE APPRECIATED

Snowfall amounts from The National Weather Service in Nashville. 

Most of the short term forecast models have locked on similar solutions, which puts a band of snow across middle Tennessee by mid morning.  Here's a look at the 11pm run of the H-R-R-R model.  (From Weatherbell)

Threat for snow will wind down tomorrow night...when we will likely see overnight lows fall into the low to mid teens area wide.

(From The National Weather Service Nashville)