Mesoscale Discussion 0066
NWS Storm Prediction Center Norman OK
0300 AM CST Thu Feb 06 2025
Areas affected...much of Pennsylvania...northern Maryland...northern
Delaware...western New Jersey...and southwestern New York.
Concerning...Winter mixed precipitation
Valid 060900Z - 061400Z
SUMMARY...A mixture of sleet, freezing rain, and snow is expected
this morning across portions of the central Appalachians into the
Mid-Atlantic.
DISCUSSION...A progressive shortwave trough and attendant mid-level
jet streak are moving through the Ohio Valley this morning. Ahead of
this trough, widespread stratiform rain, with some embedded
convection, has developed within a region of dCVA and strong
isentropic ascent. Expect this region of freezing rain, sleet, and
snow to expand further this morning as ascent increases with an
expanding/strengthening low-level jet. Temperatures remain in the
mid to upper 20s across much of Pennsylvania and surrounding areas.
These well-below freezing temperatures, combined with sustained 10
mph winds, create an environment favorable for ice accretion this
morning from Lake Erie to the Atlantic Ocean near New
Jersey/Delaware. Temperatures are expected to warm above freezing
across Delaware and New Jersey by daybreak as strengthening
low-level southeasterly flow off the Gulf stream progresses inland.
Isolated pockets of freezing rain, correlated with terrain, exist
farther south across Virginia, but will eventually erode as warmer
air advects into the region.
..Bentley.. 02/06/2025
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...PHI...BGM...BUF...CTP...LWX...PBZ...CLE...
LAT...LON 42158037 42457948 42867907 42867784 42087593 41397507
40447475 40147457 39567440 39257483 39407644 39417724
39527801 39867893 40517967 42158037
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