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Mesoscale Discussion 77 |
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Mesoscale Discussion 0077
NWS Storm Prediction Center Norman OK
0521 PM CST Sat Feb 08 2025
Areas affected...parts of the Northeast and southern New England
Concerning...Heavy snow
Valid 082321Z - 090315Z
SUMMARY...Leading corridor of winter storm across the Northeast will
produce a heavy snow band before transitioning to sleet/freezing
rain from the southwest. Heavy snowfall rates of 1-2 inches per hour
are likely.
DISCUSSION...A fast-moving swath of winter mixed precip will spread
across the Northeast and southern New England states through the
rest of this evening. Strengthening low to mid-level ascent will
yield a band of heavy snow along the leading periphery of this
precip plume where the thermodynamic profile remains entirely below
freezing. The initial swath should emanate out of the north-central
PA/southwest NY vicinity, where heavy snow has been observed, and
should expand east-southeastward along the NY to PA/NJ border area
over the next few hours. A longer-lasting deformation zone within
the cold-conveyor region should develop east from the Lake Erie
vicinity and move across much of southern NY during the next several
hours. A highly consistent signal persists across daytime guidance
with snowfall rates of 1-2 in/hr. The southern portion of the heavy
snow swath to about the Upper DE and Lower Hudson Valleys should mix
with/transition to sleet/freezing rain later in the evening.
..Grams.. 02/08/2025
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...GYX...BOX...OKX...ALY...PHI...BGM...BUF...CTP...
LAT...LON 40677327 41357478 41657603 41777768 42117911 42547929
43117880 43417525 43287361 42927212 42647131 42087094
41517107 40927210 40677327
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