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3/11-3/12 Winter Storm


BornAgain13

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Saturday I can see some pointless snow in the Piedmont. Not much dynamics so flakes will "float" down onto warm ground and melt. After about 1 hour flakes will "float" down onto cool wet ground and melt.  Someone will report that for the past hour it has been "pouring" snow with flakes the size of "manhole covers". When asked how much they have, will reply, "There's a bit of slush on some car roofs."  And then it's over.

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23 minutes ago, packbacker said:

Would love to have a model run with the GFS and it's handling of the NS energy and the Euro/CMC with the stronger southern piece.  Need the southern pieces stronger...if we are going to see snow.

All you need is the NAM Pack (well, the 12z run anyway).  All this other HECS stuff is fools gold for us

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12 minutes ago, jburns said:

Saturday I can see some pointless snow in the Piedmont. Not much dynamics so flakes will "float" down onto warm ground and melt. After about 1 hour flakes will "float" down onto cool wet ground and melt.  Someone will report that for the past hour it has been "pouring" snow with flakes the size of "manhole covers". When asked how much they have, will reply, "There's a bit of slush on some car roofs."  And then it's over.

Omg you have me laughing hysterically. Thank you for that.

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GSP Disco

The main order of business will be the winter weather potential over
the weekend. A mid-level impulse will dive southeast through the
central plains on Saturday and sharpen up over the MS Valley
Saturday night. Meanwhile, a 1048 mb arctic high center pushing
south across Saskatchewan Friday night into Saturday will send very
chilly thicknesses settling southward across our forecast area. The
nose of this sprawling high pressure system will be in place on
Saturday and increasing clouds from the west will keep temperatures
on the chilly side. A developing surface reflection should then move
from the Gulf Coast to the southeast coastline through late weekend.
Ahead of the approaching upper support, a 140 kt upper jetlet
passing north of the region through the Mid-Atlantic area will bring
strong right entrance region upper divergence through our forecast
area. The peak of the deep layer QG forcing and deeper moisture will
cross the area overnight Saturday night into Sunday morning. In
addition, moist low level upglide into the cold airmass will ramp up
Saturday evening and maximize around 09Z Sunday. Model profiles for
the main event are spread into warmer (ECM/Canadian) and cooler
(GFS/NAM) camps. The GEFS and SREF are not especially supportive of
the very cold/wet solutions so uncertainty remains high. The one
point of consistency is that none of the models exhibit any degree
of warm nosing in profiles, and the ptype forecast will be
predicated on how deep the surface based warm layer remains. It
still appears as if the NC/SC border is generally where the
rain/snow line will set up, and any heavier banded precipitation
toward daybreak Sunday could push snow showers briefly southward to
produce light snow accums on otherwise warm ground. All told, it
remains too early for watch products and the HWO mention will
continue.
 

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6 minutes ago, packfan98 said:

Here's the snow depth for what should be the "ground truth."  Respectable, and not too out of line with some other predictions.  Looks like 3 inches outside the mountains will be the high water mark:

snod.us_ma.png

That little dip-down in Wake Co. is over Packbacker's house.

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Difference between 2/14 for the follow up coastal is there was spacing between the coastal and the NS energy which left just enough cold air.  So far the models aren't showing the spacing and it's killing our chances of seeing snow from the coastal, outside of the mtns.

2014_02_13.gif

 

2014_02_14.gif

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