St. Andrews, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

600
FXUS62 KCAE 160626
AFDCAE

Area Forecast Discussion
National Weather Service Columbia SC
226 AM EDT Sat May 16 2026

.WHAT HAS CHANGED...
Removed discussion regarding this afternoon`s temperature and
added mention of thunderstorm chances for Sunday in the CSRA.
Aviation updated for 00z issuance.

&&

.KEY MESSAGES...
- 1. High confidence in above normal temperatures as we get into
  next week. Rain chances arrive by the middle to end of next
  week.

&&

.DISCUSSION...
Key Message 1: High confidence in above normal temperatures as
we get into next week. Rain chances arrive by the middle to end of
next week.

Confidence remains high in the forecast over the next 7 days,
with limited weather impacts expected until Thursday or Friday
of next week. We will begin really warming up today as surface
high pressure shifts to our east & upper level ridging begins to
overspread the region. A deep trough is forecast to dig into the
central Rockies over the next 24 hours, which will only help to
amplify the mid and upper level heights across the eastern CONUS
through early next week. Sensible weather will be driven by the
combination of the ridging & the surface high being to our east.
Moisture is expected to be higher than it has been as persistent
onshore flow allows for dewpoints to bump up into the low and
mid 60s for much of the next 7 days. One interesting nugget
within this forecast is the chance for showers/storms
Sunday afternoon. Guidance shows an inverted surface trough
coinciding with a weakness in the 500 hPa heights Sunday
afternoon, in addition to fairly robust CAPE (HREF mean suggests
1500-2000 j/kg). The greatest concentration of convection looks
to be across central GA closer to the weakness in the heights.
However, guidance has been increasing convection gradually over
the last couple of days so that may continue. Beyond that, the
anomalously warm temps are the most impactful weather feature.
Temps in the low to mid 90s are expected Sunday through
Wednesday before a slow moving front arrives Thursday/Friday and
brings an increase in rain chances.

&&

.AVIATION /06Z SATURDAY THROUGH WEDNESDAY/...
VFR conditions likely through the valid TAF period. Slight
chance of brief, shallow fog at AGS.

High pressure located offshore will keep winds light and variable to
calm early this morning with speeds increasing out of the
south/southwest after sunrise. Windspeeds remain less than 10
kts through this afternoon before returning to light and
variable this evening. The air mass in general remains very
dry, but some shallow moisture return to the low levels is
possible with the onshore flow. This setup may favor brief
patchy fog at the Augusta sites (AGS/DNL), though model guidance
remains pessimistic. Overall, significant impacts to aviation
are unlikely and any restrictions near bodies of water should
be minimal.

EXTENDED AVIATION OUTLOOK...Moisture increases early Sunday and
the first part of next week which may lead to early morning fog
or stratus. Shower and thunderstorm chances return mid week.

&&

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

&&

$$

DISCUSSION...PL
AVIATION...EC