Area Forecast Discussion...UPDATED
National Weather Service Baltimore MD/Washington DC
923 PM EST Sat Jan 30 2021
.SYNOPSIS...
Low pressure will approach the Tennessee and Ohio Valley into
Sunday morning. This low will track into the Mid Atlantic region
on Sunday, transferring its energy off the coast of the
Carolinas and Virginia Tidewater region Sunday night into
Monday. The low will strengthen off the Delmarva Peninsula
Monday afternoon and Monday night, tracking northeastward on
Tuesday. High pressure will then return for the middle portion
of next week before low pressure and its associated cold front
may impact the area late in the week.
&&
.NEAR TERM /UNTIL 6 PM SUNDAY/...
Fcst through 00Z Mon remains on track and with high confidence
that all areas except Calvert and St. Mary`s will get a good
plowable snow of around 6 inches or more. Fcst confidence after
that time decreases due to mid-level dry slot moving in,
uncertainty in sfc temperatures, and amount of QPF. Model
guidance do show ENE convergent flow into strengthening low
pressure off the coast with potentially as much as 0.15 inches
liquid equivalent which would likely be all wintry. I think we
could see some good ice accretion more than what models are
suggesting especially for areas west of I-95 where temperatures
will likely stay in the upper 20s. Areas south of the Capital
Beltway will likely rise above freezing to keep precip as liquid
Sun night into Mon morning.