175
FXUS62 KCAE 140713
AFDCAE

Area Forecast Discussion
National Weather Service Columbia SC
313 AM EDT Sat Sep 14 2024

.SYNOPSIS...
Generally low chances for rain overnight tonight. There will be
a chance of showers and thunderstorms each day through early
next week with deep moisture over the region. Low pressure is
expected to develop offshore next week, potentially enhancing
rain chances.

&&

.NEAR TERM /THROUGH TONIGHT/...
Key Message(s):

- Mostly cloudy conditions.
- A few light showers are possible.

Not a whole lot of change in the overall pattern through
tonight. Francine remnants will continue to slowly spin over
western TN. Closer to SC/GA, a weak surface trough will remain
off the coast. Between these systems, and area of high pressure
off to the north will keep low level northeasterly wedge wind
flow pattern across the region. Through the day, moisture will
lift over the surface wedge, keeping a good amount of clouds
this morning. In addition, a few light showers will remain
possible this morning. QPF amounts will continue to be light
with any rainfall.  May see some drier air moving in which
will bring some breaks by this afternoon and evening. With a
tight pressure gradient between the offshore trough and the
ridge of high pressure north of the region, breezy conditions
will remain. Winds around 10 mph, with gusts above 20 mph
through the period. As for temperatures, readings remain below
normal with the expected cloud cover for much of the day. Highs
only in the lower 80s. Lows tonight back into the mid to upper
60s.

&&

.SHORT TERM /SUNDAY THROUGH SUNDAY NIGHT/...
Key Message(s):

- Light showers possible

Easterly mid and low level flow will promote weak moisture
advection over the forecast area leading to mostly cloudy skies
on Sunday. At the surface, high pressure will ridge into the
region from the north with near-surface dry air undercutting the
moisture aloft. As a result, the highest pops will be in the
southern portion of the forecast area. However with shallow
moisture and weak lapse rates we expect mostly scattered showers
with possibly an isolated thunderstorm. There could be some
breaks in the cloud cover during the afternoon, especially in
the northern portion of the forecast area, but overall cloudy
skies should keep temperatures below normal in the low to mid
80s. Developing low pressure offshore will promote a
strengthening pressure gradient and breezy winds with gusts
around 20 mph. However a Lake Wind Advisory is unlikely to be
needed. Shower activity will decrease overnight but a few
lingering sprinkles could be possible.

&&

.LONG TERM /MONDAY THROUGH FRIDAY/...
Key Message(s):

- Isolated or scattered showers possible through the long term
- Low pressure will develop offshore early next week and may
  increase rainfall chances

Global ensemble models favor an upper level trough amplifying
over the eastern US through the long term. As surface low
pressure develops offshore of the Carolinas early next week we
will see moisture advect back into the region. Depending on the
track of the low, rain could spread into portions of the
forecast area early Monday and Tuesday. PWAT values from the
GEFS and ECMWF ensemble members show a large spread through the
week pointing to uncertainty in the precip forecast. There is at
least a slight chance of rain through the remainder of the long
term but the threat of hazardous weather appears low. With
below normal heights favored and the potential cloud cover or
rain each day, near or slightly below normal daytime
temperatures are favored.

&&

.AVIATION /06Z SATURDAY THROUGH WEDNESDAY/...
MVFR/IFR conditions through the morning hours before vfr
conditions return by this afternoon and tonight..

Regional observations at taf locations showing mvfr ceilings.
Clouds will lower to ifr by 10z, then a return to mvfr by mid-
morning. A return to vfr should occur this afternoon with
better mixing and slightly drier air moving into the area.
Easterly winds will remain around 10 knots with gusts up to 18
knots as strong low-level jet will be over the area. A few light
showers will be possible, but confidence remains too low to
place in any tafs at this time.

EXTENDED AVIATION OUTLOOK...Scattered showers with possible
restrictions at times through Monday as moisture pools over the
area along a front and low pressure in the southeast.

&&

.CAE WATCHES/WARNINGS/ADVISORIES...
SC...None.
GA...None.

&&

$$