Area Forecast Discussion
Issued by NWS Columbia, SC

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FXUS62 KCAE 211517
AFDCAE

Area Forecast Discussion
National Weather Service Columbia SC
1117 AM EDT Mon Sep 21 2020

.SYNOPSIS...
High pressure will continue to dominate the region, providing
dry and cool conditions through the middle of the week. Moisture
will begin returning to the area Wednesday night with low
chances of rain returning for Thursday into next weekend.

&&

.NEAR TERM /THROUGH TONIGHT/...
Surface high pressure off to the north of the region will
continue to wedge into the forecast area through the period.
Winds through the afternoon will still be gusty at times as
stronger winds aloft mix down. Gusts of 15 to 20 mph expected.
Lake wind advisory was allowed to expire since winds should
remain below criteria through the afternoon. Winds will
diminish this evening as the gradient relaxes some and surface
decouples towards sunset.

Temperatures this afternoon will remain on the cool side for
this last full day of Summer. Afternoon high temperatures of 70
to 75 degrees expected, which is about 10 degrees below normal
for most areas. Tonight will see a better radiational cooling
setup across the region, with diminishing winds, mostly clear
skies, and a dry airmass. This will bring temperatures late
tonight into the mid to upper 40s across the northern half of
the cwa, with lower 50s forecast over the southern counties.

&&

.SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/...
High pressure will be centered just northwest of the forecast
area Tuesday then weaken as it slowly moves eastward through
Wednesday. This will keep cool and dry air in place through
early Wednesday with high clouds moving in Wednesday afternoon
and night as moisture ahead of TS Beta spread through the SE US.
Temperatures will be in the low to mid 70s Tuesday with mid to
upper 70s Wednesday and overnight lows in the low 50s Tuesday
night and mid to upper 50s Wednesday night.

&&

.LONG TERM /THURSDAY THROUGH SUNDAY/...
High pressure and upper level ridging will be departing the
region Thursday as the remains of TS Beta move through the
western Gulf States. This will spread increasing moisture and
low chances of showers across the area Thursday afternoon and
Friday however there remains some intensity and moisture field
concerns surrounding Beta. Southerly flow will advect
additional moisture into the area Saturday and Sunday as the
next low pressure system drops into the Great Lakes region.
Temperatures through the long term will be slightly below normal
Thursday and Friday and near normal Saturday and Sunday.

&&

.AVIATION /15Z MONDAY THROUGH FRIDAY/...
VFR with high pressure wedging into the region from the north.
Winds will remain strong and gusty through the afternoon hours.
A weaker low-level jet will set up again later tonight, with
should remain below LLWS criteria. Skies vfr, with only some
thin cirrus across the area. With dry air in place, visibilities
should remain vfr late tonight.


EXTENDED AVIATION OUTLOOK...VFR through mid week. Moisture return
expected late week.

&&

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

&&

$$


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