This is a multi-part message in MIME format...

------------=_1640606386-57364-287
Content-Type: text/plain
Content-Transfer-Encoding: Quoted-printable

ACUS11 KWNS 271159
SWOMCD
SPC MCD 271158=20
PAZ000-NYZ000-MDZ000-WVZ000-271700-

Mesoscale Discussion 2063
NWS Storm Prediction Center Norman OK
0558 AM CST Mon Dec 27 2021

Areas affected...Portions of far western MD...western/central
PA...and far southwestern NY

Concerning...Freezing rain=20

Valid 271158Z - 271700Z

SUMMARY...Freezing rain rates may exceed 0.05 inch per 3 hours
through the morning, before precipitation gradually transitions to
rain from west to east this afternoon.

DISCUSSION...A fairly broad area of precipitation is moving eastward
this morning from eastern OH into western PA and vicinity. This
activity is being aided by strong warm/moist advection associated
with a 45-50 kt southwesterly low-level jet over the OH Valley. This
feature is expected to shift eastward across the central
Appalachians over the next several hours in tandem with the ongoing precipitation shield. Dry air in the low/mid levels noted on the 00Z
sounding from PIT still exists across parts of western/central PA
and vicinity. But, gradual moistening of the low levels will occur
this morning with light to moderate precipitation continuing to
overspread this region. Surface temperatures are generally below
freezing, and wet bulb cooling will likely aid in sub-freezing
temperatures being maintained through much of the morning,
especially across higher terrain. A warm nose aloft associated with
the strong low-level warm advection will likely support partial to
total melting of hydrometeors. An initial mix of snow/sleet should
transition fairly quickly to mostly freezing rain this morning.
Freezing rain rates around 0.05 inch per 3 hours may occur, with
locally greater rates possible in higher terrain. The freezing rain
should gradually transition to rain from west to east from late
morning into the early afternoon.

..Gleason.. 12/27/2021

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!vku75sOrMwP3FXdnyMyjEEt_dFM8qGQ-_XQEpOekcYbfFfLJyoCWYJ5t2rSEJr79_KXbKv_1$=
for graphic product...

ATTN...WFO...BUF...CTP...LWX...PBZ...

LAT...LON 40407916 40967918 41027941 41197970 41377987 41587958
41777918 41947890 42147859 42157822 41757801 41257758
40607777 39787837 39577884 39397918 39487940 40407916=20



------------=_1640606386-57364-287
Content-Type: text/plain; charset="US-ASCII"
Content-Disposition: inline
Content-Transfer-Encoding: 7BIT

= = =
To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM. ------------=_1640606386-57364-287--

--- SBBSecho 3.12-Linux
* Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105)