St. Andrews, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

369
FXUS62 KCAE 271032
AFDCAE

Area Forecast Discussion
National Weather Service Columbia SC
632 AM EDT Sun Jul 27 2025

.SYNOPSIS...
High pressure remains in the region this weekend, likely staying
in place into early next week. This will likely result in less
convection but also bring a prolonged period of dangerous heat
and humidity. Another Heat Advisory is in effect today into
Monday morning. Heat continues through the week, but a cold
front expected by next weekend will bring cooler temperatures
into the area.

&&

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

- Hot and humid with a low chance of a shower or thunderstorm,
  especially in the Pee Dee.

- Heat Advisory goes into effect at 10am and runs through the
  overnight hours.

The intense heat and humidity continue today with a Heat
Advisory going into effect once again at 10am. Strong upper
ridging remains the primary driver of our weather today as it
slowly shifts to the west. Skies at daybreak are clear with the
exception of some westward moving high clouds. Scattered
cumulus are expected to develop around midday but the chance of
rain remains low due to the subsidence from the aforementioned
ridge and is less than 20 percent. Having said that, a passing
shower or thunderstorm cannot be ruled out but probabilities are
highest across the Pee Dee region. Highs today are forecast to
reach the upper 90s to lower 100s, with heat index values easily
reaching Heat Advisory criteria across much of the CWA. A few
spots could approach our Extreme Heat Warning criteria of 113
degrees or higher for two or more hours, but this appears to be
too limited to upgrade the existing product at the moment. Due
to expected low temperatures around 80 degrees tonight, the
Heat Advisory will continue through the overnight hours.

&&

.SHORT TERM /MONDAY THROUGH MONDAY NIGHT/...
Key message(s):

- Dangerous Heat Wave will continue into early next week.

What else can be said other than what we`ve been saying? The
heat wave will continue on Monday, with temperatures rising back
above 100 degrees by the early afternoon hours. This is due to
strong ridging aloft that will still across the forecast area.
In addition, moisture in the lower levels will be on the
increase slightly, allowing for another afternoon of exceptional
heat index readings. There is still some uncertainty as to how
high those values could climb, mainly due to the potential for
better mixing through the afternoon bringing dewpoints slightly
lower than forecast, and due to an increase in convective
chances through the afternoon bringing in some cloud cover and
rain cooled air to some areas. Due to this uncertainty, will
continue with the current Extreme Heat Watch for Monday. This
will get modified later Sunday afternoon to either another Heat
Advisory, or to an Extreme Heat Warning. Either way it will be
hot and uncomfortable.

&&

.LONG TERM /TUESDAY THROUGH SATURDAY/...
Key message(s):

- Dangerous Heat Expected to Continue through mid-week with
  Diurnal Storms Possible.
- A reprieve from the hot temperatures may be on the way late in
  the week and into next weekend.

High amount of moisture will remain across the are through much
of the week, with scattered diurnal convection each day. The
upper ridge will continue to move west of the area through the
week, allowing afternoon temperatures to only reach the mid to
upper 90s. Enough moisture will be around to keep afternoon heat
index values between 100-109 into Friday. Good news near the
end of the forecast period, a cold front driven by deepening
upper trough and strong high pressure pushing into the region
from the north will drop temperatures quite a bit by Saturday.
Afternoon temperatures only in the low to middle 80s will feel
refreshing compared to what the region has been experiencing.

&&

.AVIATION /12Z SUNDAY THROUGH THURSDAY/...
VFR Conditions Persist through the Period....

High pressure keeps the region dry with generally light winds
through the TAF period. Have maintained the TEMPO for ground fog
at all terminals and brief restrictions in visibility cannot be
ruled out during the next hour or two. Otherwise, expect SCT
cumulus to develop around daybreak but with the chance of rain
remaining low, VFR conditions are likely to continue. The
cumulus should quickly diminish with the loss of daytime heating
so expecting mainly clear skies again Sunday night with light
or calm winds.

EXTENDED AVIATION OUTLOOK...Afternoon convection could bring
brief periods of restrictions throughout the upcoming week as
coverage is expected to be greater than what has been seen this
weekend. With increasing moisture toward the early week, cannot
rule out a couple mornings with patchy stratus or fog.

&&

.CAE WATCHES/WARNINGS/ADVISORIES...
SC...Heat Advisory from 10 AM this morning to 10 AM EDT Monday for
     SCZ016-018-020>022-025>031-035-037-038-041-115-116-
     135>137.
     Extreme Heat Watch from Monday morning through Monday evening
     for SCZ016-018-020>022-025>031-035-037-038-041-115-116-
     135>137.
GA...Heat Advisory from 10 AM this morning to 10 AM EDT Monday for
     GAZ040-063>065-077.
     Extreme Heat Watch from Monday morning through Monday evening
     for GAZ040-063>065-077.

&&

$$