Savannah, Georgia 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

296
FXUS62 KCHS 142317
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
617 PM EST Wed Jan 14 2026

.WHAT HAS CHANGED...
The aviation section has been updated for the 00z TAF issuance.
Minor changes were made to the forecast and late weekend
trending more for wetter solution.

&&

.KEY MESSAGES...
- 1) Dry and breezy conditions Thursday, with dry conditions
  persisting into Friday.

- 2) Very cold temperatures will occur Friday morning, with lows
  in the upper teens to lower 20s away from the beaches.

- 3) Arctic cold front arriving on Sunday will usher below normal
  temperatures, along with the possibility of flurries Saturday
  night into Sunday morning.

&&

.DISCUSSION...
KEY MESSAGE 1: Dry and breezy conditions Thursday, with dry
conditions persisting into Friday.

A strong cold front is timed to sweep across the Coastal Plain
of GA and SC this evening. In the wake of the front, winds
should veer from the northwest and develop gusts between 20-25
mph. The air mass will be further dried by downslope flow in the
lee of the southern Appalachians and deep mixing. As a result,
sfc dewpoints will fall through the day, pushing well into the
teens by Thursday afternoon. RH values between 20 to 25 percent
are expected away from the immediate coast. The combination of
gusty northwest winds, low RH, and mostly sunny conditions
should rapidly dry fine fuels. Depending on fuel conditions
reported from fire weather partners, a Fire Danger Statement
could be needed for portions of our area on Thursday.

The center of the dry air mass will build across the Southeast
U.S. on Friday. Dewpoints could be as low as the single digits
at a few locations Friday morning, with most areas between 10 to
15 degrees. RH values should fall to the upper teens to around
20 percent very far inland and the mid 20s closer to the coast.
Fortunately, the weak pressure gradient should only support
winds between 5 to 10 mph, so no Fire Danger Statements are
expected.

KEY MESSAGE 2: Very cold temperatures will occur Friday
morning, with lows in the upper teens to lower 20s away from the
beaches.

Surface high pressure will be approaching from the west. Clear
skies and dry conditions will yield lots of radiational cooling.
Expect low temperatures in the upper teens west of I-95 and in
the typical colder spots. Along and east of the I-95 corridor to
about US Highway 17, expect low temperatures in the lower to
mid 20s. Along the beaches, expect low temperatures in the upper
20s (including the Charleston Peninsula). Temperatures will be
below freezing for 8 to 12 hours. Though, winds will ease early
Friday morning. The end result will be temperatures or wind
chills in the teens to around 20 degrees in the coldest spots,
so a Cold Weather Advisory may be needed.

KEY MESSAGE 3: Arctic cold front arriving on Sunday will usher
below normal temperatures, along with the possibility of
flurries Saturday night into Sunday morning.

A Rex Block will gradually loose cohesion as a wave situated
over the eastern Pacific approaches from the west. In response
to this downstream effect, a substantial shortwave trough will
dive southeast out of Manitoba and approach the region on Sunday
morning. This will drive another cold front through South
Carolina and Georgia Sunday. Latest deterministic guidance
(along with Ensembles) have nudged this trough further south
favoring stronger lift and moisture return over the Southeast.
There remains considerable uncertainty with this system, as it
hinges on how far south the trough shifts and how rapidly it
develops a negative tilt. It`s important to note the most recent
12Z GFS hints at the potential for a coastal low developing
offshore of the Carolinas ahead of the approaching shortwave,
and this setup would favor higher precip. amounts. However,
temperatures will be borderline along the coastline on Saturday
night into Sunday morning, thus it`ll be hard to support pure
snow and it`s more likely a rain/snow mix will apparent near the
coastline. The probabilistic Winter Storm Severity Index
(WSSI-P) continues to show a 5-10% chance for a trace of
snowfall from the colder solutions. Again, caution should be
exercised here as the forecast can change, and will likely
change over the next couple days. It`s too far out in the
forecast to talk about exact snow accumulations and any small
change in the forecast could move the precip. off the coast and
keep the region dry.

Behind the cold front, temperatures will again be seasonably
cold Monday with low temperatures in the mid 20s. However, there
is a much larger spread in the interquartile range (IQR) range
(around 8 to 10 degrees) compared to Friday morning of this week
and that makes sense. Ahead of the approaching high pressure,
winds may remain just strong enough (near 5 knots) where wind
chills may dip into the 15 to 20 degrees range, with highest
probabilities again for the furthest inland areas. A Cold
Weather Advisory may be needed. Highs on Monday remain below
normal as temps. only reach into the upper 40s to low 50s.

&&

.AVIATION /00Z THURSDAY THROUGH MONDAY/...
VFR conditions will prevail at KCHS, KJZI, and KSAV through 00z
Friday. A cold front will move through the region overnight
which will turn winds westerly and then northwesterly, becoming
gusty. Frequent gusts into the 20-25 knot range are expected
beginning after sunrise Thursday and continuing through the
afternoon. Skies will remain mostly cloudy through the night,
then should clear out by mid morning Thursday.

Extended Aviation Outlook: VFR conditions will continue for
KCHS, KJZI and KSAV through late week. Another system could
impact the region late this weekend.

&&

.MARINE...
A strong cold front will cross the Atlantic waters overnight,
with west-northwest winds developing in the wake of the front.
It`ll become quite breezy with FROPA with wind speeds ranging
from 15 to 20 with gusts up to 25 kts until Thursday night.
Also, expect seas to build tonight through Thursday, peaking
between 3 to 5 ft across the nearshore waters with 6 footers
beyond 30 NM Thursday evening. Small Craft Advisories have been
issued for all marine zones outside the CHS Harbor from this
evening through Thursday night. The center of a large area of
high pressure will arrive on Friday and may linger into
Saturday, supporting winds around 10 kts with 1-2 ft seas. Winds
should gradually strengthen as a dry cold front sweeps across
the region on Sunday, with gusty winds and building seas,
possibly reaching Small Craft Conditions across a portion of the
waters.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...Small Craft Advisory until midnight EST Thursday night for
     AMZ350.
     Small Craft Advisory from midnight tonight to midnight EST
     Thursday night for AMZ352-354.
     Small Craft Advisory from midnight tonight to 4 AM EST Friday
     for AMZ374.

&&

$$