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ACUS11 KWNS 111519
SWOMCD
SPC MCD 111519=20
NYZ000-PAZ000-MDZ000-WVZ000-112015-

Mesoscale Discussion 0021
NWS Storm Prediction Center Norman OK
0919 AM CST Sun Jan 11 2026

Areas affected...Parts of southwestern/south-central
NY...western/central PA...and far northern WV and western MD

Concerning...Snow Squall=20

Valid 111519Z - 112015Z

SUMMARY...Periodic snow squalls with bursts of heavy snow and
visibility reductions to 1/4 to 1/2 mile will be possible into this
afternoon.

DISCUSSION...Preceding a robust midlevel trough and within the
left-exit region of a 90-100-kt midlevel jet, a secondary cold front
is tracking eastward across parts of western NY, western PA, and far
northern WV. Mosaic radar data indicates a few loosely organized
snow squalls along the wind shift -- some of which have been
associated with visibility reductions to 1/4 mile and gusty winds.
Through the afternoon, cold midlevel temperatures accompanying the
trough will steepen low-level lapse rates (generating weak low-level
instability) amid 30-40 kt of unidirectional west-southwesterly flow
in the lowest 2 km (per regional VWP). This will support the
development of periodic snow-squall conditions spreading eastward
into the afternoon.=20

Given the lack of a stronger cold front/low-level frontogenesis,
these squalls may tend to be transient and generally be associated
with visibility reductions of 1/2. However, 1/4 mile visibility and
strong gusts will be possible with the stronger squalls that evolve,
as seen by the Delevan NY State mesonet web cam in northeast
Cattaraugus County NY at 1500-1515Z.

..Weinman.. 01/11/2026

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!-R__E7FE6WRfdR1vkn2TfT1VYqC6z8zBjf6Hooxrlx8bBMbBTJ-b6CdJ8UV0qhRp_tY7XbvuW=
SRRWthwDNaEahl1VaY$  for graphic product...

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

LAT...LON   40847957 41447933 42217883 42807830 43147773 43177729
            43067649 42787614 42277584 41707596 41407639 41237689
            40837756 39407859 39147924 39297985 39627990 40847957=20


=3D =3D =3D
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