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Mid to Long Term Discussion 2017


buckeyefan1

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1 minute ago, DopplerWx said:

don't get sucked in. gfs will get everyone excited until the nam shows the warm nose 36hrs out. will take this approach until proven wrong this season.

This is why in the southeast meteorological winter is closely followed by psychologist winter.  We all get sucked in on 72 hours of model mayhem only to go to bed hopeful, wake up dejected and calling 1800-MODLSUX screaming why! why! why?!.

Its what we do.

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16 minutes ago, DopplerWx said:

don't get sucked in. gfs will get everyone excited until the nam shows the warm nose 36hrs out. will take this approach until proven wrong this season.

After 1/6/17, I won't believe in snow until I actually see it on the ground, and even then I will reserve judgement.

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2 hours ago, WidreMann said:

There won't be a warm nose. The concern with this one is boundar6y layer temperatures.

Agree. Dewpoints have been trending colder near VA/NC border.  Also back towards Charlotte Greensboro.  Since 6z. Really looking at the dewpoints the 38 isotherm has been near Greenville Pittsboro. So any snow that does fall will be back in the Piedmont. Snow will develop as evaporative cooling.  Key is getting moisture back into the cool boundary layer with out the caa from a HP.  Thought it was kind of interesting that the 12z was showing a Lee trough. 

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We've had some good model runs but the chips are still not with us. From what RAH says below, a win would be some token flakes.

 

Thursday night through Saturday, models are still going back and
forth on the the timing/location/strength of the possible
waves of low pressure that develop along the stalled boundary
from the Gulf of Mexico NE off the NC coast. The main issue
is that there is cool, dry air in place over our region, but not
cold and dry air. In addition, there is not a parent surface
high in place (in a proper position nor strength) to bring
cold air to our neighborhood (based on nearly all model solutions.
So, there will not be a source of cold dry air. That is a no go
for accumulating snow in this region. Therefore, we will stick
with the chance of rain. Temperatures should range from the
mid 30s to 40 for lows Thursday and Friday, with highs in the
40s to lower 50s SE.

Pattern recognition strongly suggests that the more robust the moisture
influx into the region (the warmer aloft it will get), and conversely
the less robust the moisture influx, the cooler it will be. Bottom
line, this appears to be a real no win situation for snow lovers with
the supply of cold dry air just not there, and the stronger the influx
of WAA to generate precipitation this far north means a warmer mid
level forecast - if the models get wetter they will get warmer. The
best chance of any snow showers may come at the tail end of the system,
as the cold air chases the moisture (but this rarely brings measurable
snow for us). This would be Friday if it occurs.

Stay tuned through, as it is expected to get colder after this
potential rain event, potentially lasting well into the end
of the month. Highs by Sunday should be in the 40s with lows in the
20s.
 

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RAH downplaying this (...which they should), but we still need to keep an eye on the possibilities.

 

From Newport/Morehead City (NC coastal areas):

Thursday and Friday...Models have continued trend with low
pressure development south of area Thu night and moving NE just
off the coast Friday, with some model differences thereafter as
GFS moves low out to NE Fri night while ECMWF lingers it into
Saturday. Given model trends, continued 20-50% POPs Thu
increasing to likely SE 2/3 of area late Thu night and then high
chance for all areas Friday into Friday evening. Some model
fields indicate potential for mixed precip inland sections late
Thu night and again late Fri night but not seeing enough general
support to include mention in forecast at this time. Highs
mainly mid 40s to lower 50s both days with lows 35-45 Thu night
and possibly a few degrees cooler Fri night.
 

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