new sterling AFD:
As of 16Z/11AM EST, precipitation continued to expand across
the Mid-Atlantic. A tight gradient in air temps had developed
from roughly Norrisville MD southwest to Wintergreen VA. NW of
this line, temps were roughly 31-33F with mainly snow (light
accums observed); SE of this line was in the mid to upper 30s
with a mix of rain, sleet, and snow (little to no accums yet).
Over the Appalachians, bands of moderate to heavy snow had
developed dropping visibility to less than half a mile; temps
over the higher terrain in these areas were in the 20s. Freezing
levels were continuing to drop per recent ACARS as well as
dual-pol data from KLWX. KPBZ/KFCX radars shows moderate to
heavy snow banding pivoting E/SE toward eastern WV/western MD.
Colder temps/bands of heavier precip are expected to press E/SE
through the day, eventually reaching the metros by 2-3PM.