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Area Forecast Discussion

552
FXUS64 KOHX 180538
AFDOHX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1138 PM CST WED DEC 17 2014

.UPDATE...

06Z AVIATION UPDATE.

&&

.AVIATION...

CLOUD COVER AND PRECIP CURRENTLY WEST OF THE REGION ARE CREEPING
EASTWARD...AND WILL IMPACT THE AREA BEGINNING WITH KCKV IN THE
NEXT HOUR OR TWO. WITH TEMPERATURES ALREADY BELOW
FREEZING...PRECIP TYPE LOOKS TO BE FREEZING RAIN WITH SLEET MIXED
IN. SNOW MAY EVEN BE IN THE MIX IF TEMPERATURES CONTINUE TO COOL.
KBNA WILL SEE THE MIXED PRECIP BY 09Z OR SO...AND BY 12Z FOR KCSV.
MOST MODELS SHOW LOW VFR CEILINGS BUT WILL NOT RULE OUT MVFR
CEILINGS BY MORNING.

&&

.PREV DISCUSSION... /ISSUED 1129 PM CST WED DEC 17 2014/

UPDATE...
DID A QUICK UPDATE TO THE GRIDS AND ZONES TO INCLUDE FREEZING RAIN
IN THE MIX FOR THE OVERNIGHT HOURS FOR A 50 MILE WIDE CORRIDOR
FROM STEWART COUNTY DOWN THROUGH NASHVILLE INTO CANNON AND WHITE
COUNTIES. THIS UPDATE BASED ON LATEST LAPS SOUNDINGS WHICH ARE
CONTINUING TO TREND TOWARD COLDER SURFACE TEMPS WHILE KEEPING WARM
NOSE IN THE 3 TO 4 DEGREE CELSIUS RANGE. THIS IS TRENDING MORE
INTO A LIGHT FREEZING RAIN AND SLEET EVENT...HOWEVER WET BULBING
COULD STILL LOWER TEMPS ABOVE THE SURFACE DOWN BELOW ZERO CELSIUS
WHICH WOULD MEAN A CHANGE OVER TO SNOW. THIS IS A TOUGH CALL TO MAKE.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

$$

06





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