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1-20-16 Winter Storm


1234snow

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I figured if we are going to see some snow this winter I would bring some mojo and start a thread. I think this is my first thread ever on here so I want a perfect record lol.

This thread is for the mid week threat. This system looks clipper like on the precip maps but it really comes from the Pacific. This storm is going to have to thread the needle in a few different ways.

#1) There isn't a lot of cold air hanging around by the time the precip comes but there should be just enough on the front end to allow for mostly snow on a line from just north of Nashville east to the mountains. The Euro has higher totals north but the GFS has accumulation all the way south into the southern valley.

#2) As the shortwave dampens out the precip erodes away further east towards the mountains. One trend to watch for Knoxville and KTRI is if the precip can hold together longer. I think closer to just north of Nashville will have the best shot at the highest totals

Here's the 0z GFS:

70e97551585ba5a467e481a935538126.jpg

Here's the 0z Euro:

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Good luck to everyone and let's reel this baby in. It might be all we get this winter.

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This was posted yesterday on the HWO issued by MRX:

A STORM SYSTEM WILL MOVE ACROSS THE REGION WEDNESDAY. THERE IS A

LOT OF UNCERTAINTY OF THE EXACT PATH AND STRENGTH OF THIS SYSTEM.

DEPENDING ON HOW FAST THE ARCTIC AIR MODERATES...THERE IS A

POTENTIAL OF LIGHT SNOW...SLEET AND FREEZING RAIN ACROSS THE AREA

FOR MID- WEEK.

They're saying that this could potentially be an ice type event, which I hope doesn't happen.

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MRX point forecast is extremely convoluted for my area. I assume it's just the computer struggling with precip type issues.

 

 

Wednesday

Rain, snow, and sleet likely before 4pm, then rain likely between 4pm and 5pm, then rain and snow likely after 5pm. Cloudy, with a high near 35. South wind around 10 mph. Chance of precipitation is 70%.
Wednesday Night
Rain and snow likely before 11pm, then a chance of rain between 11pm and 1am, then a chance of freezing rain after 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 60%.
Thursday
A chance of sleet before 9am, then a chance of rain and snow between 9am and 10am, then a chance of rain after 10am. Mostly cloudy, with a high near 41. Chance of precipitation is 40%.
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MRX afd.

 

 

 

TUESDAY NIGHT THE HIGH SHIFTS
EAST AND WINDS BECOME LIGHT SOUTHERLY BY EARLY WEDNESDAY. WEATHER
PATTERN BECOMES ACTIVE AS A SYSTEM MOVES INTO THE MID MS VALLEY
TUESDAY NIGHT THEN ACROSS THE TN VALLEY WEDNESDAY AND WEDNESDAY
NIGHT. WIDESPREAD PRECIPITATION WILL DEVELOP WEDNESDAY. AS COLD AIR
REMAINS OVER THE AREA THE PRECIPITATION WILL START AS SLEET OR SNOW
BEFORE TRANSITIONING TO RAIN AS TEMPERATURES WARM. A FEW INCHES OF
SNOW MAY ACCUMULATE BEFORE THE TRANSITION. ALSO WHERE COLD AIR
BECOMES TRAPPED SOME LIGHT FREEZING RAIN MAY FALL WEDNESDAY OR
WEDNESDAY NIGHT BUT AMOUNTS RIGHT NOW ARE EXPECTED TO BE LIGHT AS
THE TRANSITION TIME IS EXPECTED TO BE SHORT.
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Nashville disco.

 

 

 

BY DAYBREAK WEDNESDAY THE FUN WILL BEGIN. WITH ALL OF THE COLD AIR
ALREADY IN PLACE...A LOW PRESSURE SYSTEM WITH PLENTY OF ASSOCIATED
PRECIPITATION WILL BEGIN TO PUSH INTO THE STATE. AS IT DOES...WE
WILL BE PRESENTED WITH A VERY TRICKY FORECAST. A NOSE OF WARM AIR
ALOFT WILL NUDGE ITS WAY IN AS THE PRECIPITATION BEGINS.
WHILE THE ONSET OF PRECIPITATION COULD BE SNOW AND ICE PELLETS...THE
WARM NOSE STRENGTHENS AND BY MID-MORNING...A GOOD PORTION OF THE MID-
STATE COULD BE DEALING WITH FREEZING RAIN FOR AT LEAST A COUPLE OF
HOURS. THIS WILL PRESENT SOME TRAVEL HAZARDS PRIOR TO THE NOON HOUR
BUT BY MID-AFTERNOON...WE SHOULD WARM UP JUST ENOUGH TO CHANGE THE
FREEZING RAIN BACK TO RAIN FOR MOST OF THE MID-STATE AND MELT
ANYTHING THAT ACCUMULATES IN THE MORNING. HOWEVER...I AM SEEING
FORECAST SOUNDINGS IN SPOTS ON THE CUMBERLAND PLATEAU THAT DO NOT
GET ABOVE FREEZING AND THIS COULD PRESENT A PROLONGED ICE
ACCUMULATION PROBLEM. WITH THE FACT THAT WE`RE 48 HOURS OUT AND
THERE WILL LIKELY BE CHANGES IN THE MODELS BETWEEN NOW AND
THEN...KEEP A CLOSE EYE ON THE FORECAST OVER THE NEXT COUPLE OF DAYS.
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Will be interesting to see how this little system plays out.  It could certainly provide a TON of headaches in and around northern middle Tennessee on Wednesday morning.  Further east, I would think the timing of the system coming in later in the day may allow others to catch a break even if there is a minor accumulation further east.

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Will be interesting to see how this little system plays out. It could certainly provide a TON of headaches in and around northern middle Tennessee on Wednesday morning. Further east, I would think the timing of the system coming in later in the day may allow others to catch a break even if there is a minor accumulation further east.

New nam is beefier in KY AND SWVA, but virtually blanks TN. I'm not sure I quite buy its temperature profile yet. Like John said its warmer than GFS and Euro.

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Yeah the moisture starts weakening very fast once it comes east of the plateau. It has been that way on the models for the past several runs. We would have to have our shortwave stay stronger longer to help us out.

Does that model take into account freezing rain and sleet? If not, that might be the reason the snow amounts isn't that good.

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