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Upstate/Eastern New York


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4 minutes ago, WesterlyWx said:

Snowing pretty good at my job in Boston,  probably about 1/2” or so an hour. Let’s do this for the next 12 hours plus some higher rates this afternoon/early eve and this could be a nice little 6”+ event..

Nice. With what is happening in the Midwest and recent model runs, this definitely took a farther north track.

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I know what was said about the fv3 and what you posted Wolfie about the model itself and it not getting released yet and the reason behind it, but I do think the model isn't bad with respect to track intensity of these said Cyclones. So in reality it could have an issue with snowfall totals and ratios and whatnot and then on the other hand we doing a great job with respect to track profiles blah blah blah all your other goodies when looking at winter storms.

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The surface low is relatively weak, but it will slowly deepen as it moves into PA.
Despite the lacking strength of the low, its placement is nearly
ideal in terms of pattern recognition for maxing out snow amounts,
by placing nearly all of WNY on the northern side of the low, with
broad banding slowly pivoting overhead.

The first part of the event is featuring first warm advective snow
with relatively low snow ratios (10-15:1 (WNY average is around 16:1
for synoptic)). The warm conveyor belt can be found easily by
following 925mb temperature or temperature advection which was
rapidly approaching WNY at around 10AM.
This should move east during the day, but will be followed by
increasingly higher snow ratios and snow rates as cold air starts to
move in from the west behind the low.  Meanwhile, the upper level
jet is weakly coupled, with one jet moving off the East Coast while
the jet associated with the upper level shortwave trough moves in
from the west.  Both jets can be picked out by looking for the 150kt
jet streak around 30000` per AMDAR.  Forecast soundings show a
completely saturated column by this afternoon with saturation to 12-
15k feet within the dentritic growth zone.
The main IMPACT will be from 1-9PM with snow rates near 1 in/hr into
the evening commute. Total snow accumulations will range from 3-8
inches - lowest east of Lake Ontario and near the PA border, and
highest right across most of WNY east to the Finger Lakes. Most of
this snow will fall in a 6-8 hour period this afternoon/early
evening. A Winter Weather Advisory remains in effect across Western
NY.
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