Subj : MESO: Mesoscale Discussion 2046
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Thu Dec 15 2022 16:24:56

ACUS11 KWNS 151624
SWOMCD
SPC MCD 151624=20
NYZ000-NJZ000-PAZ000-152030-

Mesoscale Discussion 2046
NWS Storm Prediction Center Norman OK
1024 AM CST Thu Dec 15 2022

Areas affected...Portions of eastern Pennsylvania...southern New
York...and far northwest New Jersey

Concerning...Winter mixed precipitation=20

Valid 151624Z - 152030Z

SUMMARY...Snow, sleet, and freezing rain will transition to mostly
snow this afternoon across portions of the central Appalachians.

DISCUSSION...Freezing rain has been observed for much of the morning
across eastern Pennsylvania and vicinity. In this region, a large
warm conveyor belt, associated with a large upper low across the
Midwest has overspread cold air damming east of the Appalachians.
However, temperatures aloft are not that warm across the region with
RAP forecast soundings showing a warm nose around 1 to 2 C across
eastern Pennsylvania. Therefore, the entire profile should drop
below freezing in the next several hours as temperatures cool aloft
and a surface low currently over South Carolina deepens and moves up
the coast.=20

Moderate, to locally heavy snow is expected once this occurs with
snowfall rates up to 1 inch per hour.

...Bentley.. 12/15/2022

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!5pbT4DlFnvMVXHrCYB9kRQ1XMe1e3fK94BXIDhELXCKgWNgp18tKtNg5MAZUCpTxB0Ki1k-Aj=
jlQfTt15OJP25WLXkY$  for graphic product...

ATTN...WFO...OKX...PHI...BGM...BUF...CTP...

LAT...LON   41917879 42417816 42707706 42537604 41617470 41127434
            40647525 40067605 40037660 40147708 40437744 41027814
            41917879=20


=3D =3D =3D
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