Area Forecast Discussion
Issued by NWS Columbia, SC
FXUS62 KCAE 240808
Area Forecast Discussion
National Weather Service Columbia SC
308 AM EST Tue Jan 24 2017
A strong low pressure center off the Mid-Atlantic coast will lift
north today allowing surface high pressure to build across the
region tonight into Wednesday. A cold front will cross the area
Thursday morning with scattered showers. Seasonably cool
temperatures and dry weather will return for the end of the week
into early next week.
.NEAR TERM /THROUGH TONIGHT/...
Surface low pressure off the Mid-Atlantic coast will continue to
lift north away from the region today. Surface high pressure and
upper level ridging over the Mississippi River Valley will move
into the area tonight. A dry airmass will overspread the area
today with precipitable water falling to one half inch or less.
Early morning clouds over the eastern Midlands will give way to
mainly clear skies today and tonight. Kept afternoon highs in
the low to mid 60s, which are in line the guidance consensus.
Lows tonight still expected to cool to the upper 30s and lower
.SHORT TERM /WEDNESDAY THROUGH THURSDAY/...
Surface high pressure and the upper level ridge will move off the
coast Wednesday. Expect some high cloudiness Wednesday with
above normal temperatures. A cold front is forecast to push
through the forecast area late Wednesday night into Thursday
morning. Models suggest limited moisture and isentropic lift
with cold advection developing 12Z-15Z Thursday. Modest short
wave trough at 700 mb supporting lift as front moves through.
MOS around 30 to 50 percent...so expect scattered showers. High
temperatures in the low to mid 70s Wednesday will cool to the
upper 50s and lower 60s Thursday. Breezy conditions are forecast
to develop Thursday ad the pressure gradient tightens.
.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
Fairly quiet weather should persist for the long term with high
pressure extending from the western states across the south.
Temperatures will be below normal with dry conditions as cold
air mass moves south from Canada into the eastern CONUS.
.AVIATION /08Z TUESDAY THROUGH SATURDAY/...
Regional satellite still showing broken skies, with vfr ceilings.
Clouds will continue to push eastward tonight as the low moves
up the east coast and downsloping flow east of the mountains
begins to take hold. Skies have cleared at AGS and DNL, and will
become mostly clear at the other sites around 08Z. West to
northwest winds will prevail, with wind speeds 5 to 10 knots and
gusts between 15 to 20 knots possible. The pressure gradient
will weaken Tuesday afternoon, allowing for diminishing wind
speeds after sunset. Fog is not expected to develop due to winds
staying up overnight and drier air near the surface.
EXTENDED AVIATION OUTLOOK...There will be chance of showers with
associated restrictions Thursday as a weak cold front crosses the