Area Forecast Discussion
Issued by NWS Charleston, SC

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FXUS62 KCHS 200754
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
254 AM EST Sat Jan 20 2018

.SYNOPSIS...
High pressure will prevail this weekend. A cold front will move
through the region Tuesday morning, followed by more high
pressure for most of next week.

&&

.NEAR TERM /THROUGH TODAY/...
Shortwave ridging will extend across the Southeast U.S. today
ahead of a potent southern stream shortwave currently propagating
across the lower Mississippi Valley. Cirrus associated with the
subtropical jet will occasionally traverse the skies through
the day, but these clouds should remain fairly thin. Abundant
sunshine coupled with about a 2-3C rise in H8 temperatures will
finally support a day with above normal warmth. Expect highs to
top out in the mid 60s for many areas away from the beaches. A
weak sea breeze circulation is likely to develop by early
afternoon along the beaches, but will not move very far inland
given the modest westerly flow in place.

&&

.SHORT TERM /TONIGHT THROUGH TUESDAY/...
Tonight: Cirrus will slowly increase overnight as the subtropical
jet pivots north ahead of the southern stream shortwave. Dry
conditions will continue as surface high pressure holds firm. It
will not be nearly as cold as the past several nights with lows
expected to only drop into the mid 30s inland, upper 30s at the
coast and the lower 40s at the beaches. There could be a little
shallow ground fog, but no major impacts are anticipated.

Sunday through Tuesday: High pressure will prevail over the
Southeast Sunday and the first part of Monday, bringing dry
conditions and above normal temperatures. A cold front will
approaches from the west late Monday, causing clouds and POPs to
increase. The front will move through Tuesday morning, bringing
showers that should drop a few hundredths of an inch of QPF
across the area. High pressure will quickly build in behind the
front for the second half of Tuesday.

&&

.LONG TERM /TUESDAY NIGHT THROUGH FRIDAY/...
High pressure will prevail for the long term, bringing dry
conditions and seasonal temperatures.

&&

.AVIATION /06Z SATURDAY THROUGH WEDNESDAY/...
Primary concern:
* None.
VFR.

Extended Aviation Outlook: Flight restrictions are possible with a
cold front Monday night into Tuesday morning.

&&

.MARINE...
Today and Tonight: West to southwest winds will persist through
the period. Speeds will remain <15 kt with seas 1-2 ft.

Sunday through Wednesday: High pressure will prevail Sunday into the
first part of Monday. A cold front will move through the region
Tuesday morning, bringing showers and maybe sea fog. High pressure
will follow later Tuesday and then prevail through midweek.

&&

.EQUIPMENT...
The KCLX radar is out of service until further notice. Repairs
are ongoing. Adjacent radars include: KLTX, KCAE, KJGX, KVAX and
KJAX.

The Downtown Charleston observation site (CHLS1/KCXM) remains
out of service until further notice.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...None.

&&

$$



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