MD 2046 CONCERNING WINTER MIXED PRECIPITATION FOR PORTIONS OF EASTERN PENNSYLVANIA…SOUTHERN NEW YORK…AND FAR NORTHWEST NEW JERSEY
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
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.
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 www.spc.noaa.gov 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
