RAH extended
.LONG TERM /SATURDAY THROUGH THURSDAY/...
As of 415 PM Thursday...
On Saturday morning a low pressure system just off the FL/GA coast
will continue to deepen through the day as it skirts off the Mid-
Atlantic coastal waters. A strong cold front stretching across much
of the Mississippi Valley will be approaching the Mid-Atlantic
region bringing a chance of rain through much of the day Saturday.
While the moisture and rain from the coastal low will impact areas
in the Coastal Plain and portions of the Sandhills, the approaching
front will bring rain to the western portions of the region. For
much of the day Saturday expect scattered to numerous periods of
rain with perhaps a lull Saturday evening for portions of the
Piedmont. As the front pushes through the region late Saturday night
early Sunday morning the rush of colder dry air will filter in
behind. As the precip is pushed out early Sunday morning, a rain
snow mixture beginning along the VA/NC border could occur. By the
end of the event, Sunday afternoon the rain/snow mix line could
expand southward along and north of US-64. After the sunsets temps
will continue to drop increasing chances fro the change over to snow
as the precip moves out of the region late Sunday evening. Best
chance for all snow will be north of the Triangle,but west of I95,
with the rain/snow mix continuing for much of the northern coastal
plain region.
Cold arctic high pressure will build in with the coldest
temperatures of the season Sunday night temperatures after the
precip moves out. Sunday night temperatures will quickly drop into
the 20s for much of the region by midnight and wide spread teens
across the Piedmont region for the lows Monday morning. While these
low temperatures are dangerous, wind chills in the single digits are
also expected. The Sandhills and portions of the Coastal Plain
regions will see temps fall into the low 20s Sunday night with wind
chills in the low/mid teens. Cold temperatures will continue for at
least the next 72 hours in most areas. For example areas around
Raleigh will see around 86 hours of temperatures below freezing from
Sunday night to Thursday afternoon. Cold dry air will be in place
Monday and much of Tuesday with highs in the mid 20s NW to near 30
SE. Lows will be in the low teens to near 20 in most areas. Again
wind chills will be in the single digits for Monday and Tuesday
mornings.
Tuesday afternoon another weather system is expected to move into
the region. While models are still inconsistent with the track of
the parent low that would fuel the precip and p-type, ensembles have
shown there might be enough moisture in the atmosphere to produce
some measurable snow Tuesday afternoon and overnight. The cold
temperatures are in place, but the big question will be will there
be enough moisture along side the cold air. Will keep a close watch
on the developing low and expected track over the next couple days.