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Potential Big Dog Snow Event February 15th


Stovepipe

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06z NAM doesn't cut, the clipper is too close, it gets kicked across central Georgia at  frame where the GFS has it on the Alabama/Tennessee border. Then it  scoots due east and out to sea.  Meanwhile a warm/wet clipper system is poised to roll into the area by 84. It still gets close enough to the area to dump heavy rain all the way to Ohio.

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I am going to guess that Nashville issues Winter Storm Watches for at least it's northern tier of counties. Kentucky WFO will probably do the same. MRX will either issue one for SW Va/Mountains or not one at all yet. Mrx will forecast probably 1-4 inches around and north of 40.

That is a good question, Nashville usually plays it pretty close, one would think that they would

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Haha 6z GFS appears south again. Don't know what happens between 66 and 72, but at 72, the low is moving into SC maybe a hair west of Columbia.

Not up the mtns and over on this side. It may come up to the border and drop down, but it appears to make the turn up through SC

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SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
433 AM CST SAT FEB 13 2016

TNZ005>011-023>034-056>066-075-077>080-093>095-132200-
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-
INCLUDING THE CITIES OF...DOVER...CLARKSVILLE...SPRINGFIELD...
GALLATIN...LAFAYETTE...CELINA...BYRDSTOWN...ERIN...WAVERLY...
DICKSON...ASHLAND CITY...NASHVILLE...LEBANON...MOUNT JULIET...
HARTSVILLE...CARTHAGE...GAINESBORO...COOKEVILLE...LIVINGSTON...
JAMESTOWN...LOBELVILLE...CENTERVILLE...HOHENWALD...FRANKLIN...
BRENTWOOD...COLUMBIA...LEWISBURG...MURFREESBORO...WOODBURY...
SMITHVILLE...SPARTA...CROSSVILLE...SHELBYVILLE...TULLAHOMA...
MANCHESTER...MCMINNVILLE...ALTAMONT...SPENCER...WAYNESBORO...
LAWRENCEBURG...PULASKI
433 AM CST SAT FEB 13 2016

...WINTER WEATHER EXPECTED TO CAUSE HAZARDOUS TRAVEL ACROSS MUCH
OF MIDDLE TN AND THE CUMBERLAND PLATEAU SUNDAY AND SUNDAY NIGHT...

VERY COLD AIR WILL BE IN PLACE ACROSS MIDDLE TENNESSEE ON SUNDAY
AS AN APPROACHING STORM SYSTEM CAUSES PRECIPITATION TO DEVELOP.
LIGHT SNOW WILL START ACROSS THE NORTHWEST COUNTIES SUNDAY
MORNING...THEN THE PRECIPITATION WILL INCREASE IN COVERAGE AND
INTENSITY ACROSS THE ENTIRE MID STATE SUNDAY MIDDAY AND AFTERNOON.
MOST LOCATIONS WILL SEE SNOW...EXCEPT THE FAR SOUTHERN COUNTIES
ALONG THE ALABAMA BORDER...WHERE RAIN WILL FALL. TRAVEL COULD
BECOME HAZARDOUS SUNDAY AFTERNOON...ESPECIALLY FOR AREAS NORTH OF
INTERSTATE 40...WHERE FREEZING SURFACE TEMPERATURES ARE MORE
LIKELY.

GOING INTO SUNDAY NIGHT...WARMER AIR WILL CAUSE THE PRECIPITATION
TO CHANGE OVER TOO ALL RAIN FROM SOUTH TO NORTH. BEFORE THIS
CHANGE IS COMPLETE...SNOWFALL TOTALS ARE EXPECTED TO REACH AROUND
1 INCH FOR AREAS ALONG INTERSTATE 40...AND 2 TO 3 INCHES FOR AREAS
ALONG THE KENTUCKY BORDER AND ACROSS THE UPPER CUMBERLAND REGION.
IN ADDITION TO THE SNOW...THERE COULD BE A PERIOD OF FREEZING
RAIN...CAUSING ICY CONDITIONS.

MOST OF THE MID STATE WILL HAVE ALL RAIN WITH ABOVE FREEZING
TEMPERATURES BY DAYBREAK MONDAY...BUT THE UPPER CUMBERLAND REGION
COULD STAY COLD AND ICY UNTIL MID MORNING.

THERE IS STILL UNCERTAINTY ABOUT THIS FORECAST...ESPECIALLY HOW
QUICKLY TEMPERATURES WILL WARM UP AND CAUSE THE PRECIPITATION TO
CHANGE OVER TO RAIN. SMALL TEMPERATURE CHANGES COULD CAUSE THE
SNOW FORECASTS TO GO UP OR DOWN SIGNIFICANTLY.

PEOPLE PLANNING TRAVEL IN MIDDLE TENNESSEE OR SURROUNDING AREAS
SHOULD BE PREPARED FOR TRAVEL PROBLEMS SUNDAY INTO EARLY MONDAY
MORNING. PLEASE MONITOR UPDATED FORECASTS FOR THE LATEST ON THIS
DEVELOPING WEATHER SITUATION.

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OHIO/TENNESSEE VALLEYS TO THE MID-ATLANTIC/NORTHEAST...

INGREDIENTS ARE POTENTIALLY COMING TOGETHER FOR A HIGH-IMPACT

WINTER WEATHER EVENT ACROSS THE EASTERN U.S. EARLY NEXT WEEK...BUT

THE DETAILS OF THE FORECAST REMAIN VERY UNCERTAIN.

STRONG ISENTROPIC LIFT AHEAD OF AN UPPER TROUGH CROSSING THE

PLAINS WILL FOCUS PRECIPITATION ACROSS THE TENNESSEE VALLEY AND

LOWER OHIO VALLEY SUNDAY NIGHT...WHICH SHOULD INTENSIFY AND SPREAD

NORTH AND EAST INTO THE MID-ATLANTIC AND NORTHEAST ON MONDAY AS

THE UPPER TROUGH SHARPENS AND A SURFACE LOW BEGINS TO DEEPEN WHILE

TRACKING TOWARDS THE APPALACHIANS. SEVERAL LOCATIONS COULD

TRANSITION FROM HEAVY SNOW...TO FREEZING RAIN...TO HEAVY RAIN AS

WARM MOIST AIR OVERRUNS A STRONG ARCTIC AIRMASS IN PLACE ACROSS

THE EASTERN U.S.. THE MAJORITY OF MODEL GUIDANCE CONTINUES TO

MAKE FAIRLY SIGNIFICANT FLUCTUATIONS WITH THE LARGE SCALE

EVOLUTION OF THE UPPER TROUGH AND DEEPENING SURFACE LOW...MAKING

IT EXTREMELY CHALLENGING TO NARROW IN ON THE DETAILS OF THE

FORECAST...WHICH ARE ALREADY HIGHLY SENSITIVE TO THE SLIGHTEST

SHIFT IN GUIDANCE. FOR NOW...THE WPC FORECAST TRIED TO STAY IN

THE MIDDLE OF THE LARGE MODEL SPREAD...BUT THE FORECAST WILL NEED

TO BE MONITORED CLOSELY FOR UPDATES.

PLEASE REFER TO THE PMDHMD FOR MORE DETAILS ON MODEL DIFFERENCES

AND THE QPFPFD FOR DETAILS ON THE HEAVY RAIN THREAT WITH THIS

EVENT.

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Lots of different solutions out there this AM.

I really don't recall so many solutions to a storm track this close to an event in all the years tracking winter storms.  I'm still so very iffy on a track up the spine of the Apps.  I'm not sold just because climatologically speaking its an incredibly rare event to track over the high country with the SLP.  West or East of the Apps i'm still betting, with east of the Apps my bet.

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I really don't recall so many solutions to a storm track this close to an event in all the years tracking winter storms. I'm still so very iffy on a track up the spine of the Apps. I'm not sold just because climatologically speaking its an incredibly rare event to track over the high country with the SLP. West or East of the Apps i'm still betting, with east of the Apps my bet.

Weren't we all saying this during the Jan system? Obviously, the two systems are entirely different, but models could not get a handle then either.

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New to the board. I know a few posters on here and finally decided to join the party. I live in Halls off Emory rd close to the High School in North Knox Co.

Sent from my iPhone using Tapatalk

Welcome to the family Powell, nice to have another east TN poster in the house!

Para GFS at 6z keeps most of east TN snow until around 10am. (Give or take an hour or two). If the precip is heavy enough it could be a situation that it stays snow for those couple of extra hours and create quite a thump before getting washed away... Does anyone have qpf data for the para through 15z Monday (10am)?

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Sitting at halftime...some brief thoughts. Hey Powell, welcome!

Para Euro is almost a miller A. I suspect we are going to see a Miller A over the western Piedmont. The waa is pretty wicked in terms of warm. Need the system to stay flat and move quick. Models after 12z have trended warmer, south, and faster. 2/3 is not bad. See u back at 2:00.

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