AFOS product AFDCHS
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Displaying AFOS PIL: AFDCHS
Product Timestamp: 2019-06-02 19:39 UTC

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FXUS62 KCHS 021939
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
339 PM EDT Sun Jun 2 2019

.SYNOPSIS...
A cold front will move through tonight and early Monday. High
pressure will then build into the region from the north, before
shifting offshore mid week. A weak inland surface trough will
then prevail late week with an increasing potential for
unsettled weather next weekend. 

&&

.NEAR TERM /UNTIL 6 AM MONDAY MORNING/...
A generally dry cold front will move into southeast SC/GA late
tonight. Moisture and forcing look limited so we are not
expecting much in the way of showers but some of the higher
resolution models indicate a few showers will be possible.  
Lows should range from the mid to upper 60s inland to mid 70s at
the coast. 

&&

.SHORT TERM /6 AM MONDAY MORNING THROUGH WEDNESDAY/...
Surface high pressure will begin to build in from the north on 
Monday behind a departing cold front. Quiet weather conditions are 
expected as drier air advects into the area. Highs will range from 
the low 90s in the northern zones to mid/upper 90s along the 
Altamaha. Monday night will be seasonable, with lows in the 60s.

The flow will become more onshore on Tuesday as the high gradually 
shifts into the Atlantic, allowing for an increase in low level 
moisture. Isolated showers and thunderstorms are possible during 
peak heating along the sea breeze, with highest chances across 
southeast Georgia. The bigger story will be the noticeably cooler 
temperatures. Highs are forecast to peak right around normal in the 
mid/upper 80s, with some low 90s in interior Georgia. 

Atlantic high pressure will persist on Wednesday. Precipitation 
coverage is a bit uncertain. During the daytime hours, the NAM and 
GFS are on the drier side with most activity inland of the forecast 
area, while the Euro paints a wetter picture. Given there is not 
much forcing for convection, have opted to keep rain chances in the 
20-30% range. Highs are forecast to be a couple of degrees warmer 
than Tuesday. 

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/...
Upper ridging on tap Thursday and perhaps into Friday with 
diurnal convection remaining rather isolated for the most part 
many areas. Moisture will be deeper and if the northern flanks 
of the ridge do decay a bit earlier, we could see more in way of
coverage of showers and tstms over inland areas adjacent to the
CSRA and Midlands, especially on Friday. Some form of 
significant upper troughing will take shape over the eastern 
U.S. over the weekend and we expect our region will become more 
active with convection with periodic bouts of unsettled weather.
Temps should continue to run above climo norms.

&&

.AVIATION /19Z SUNDAY THROUGH FRIDAY/...
VFR conditions will prevail at KCHS and KSAV through 18Z Monday.
Gusty winds to near 20 kt expected at times this afternoon.

Extended Aviation Outlook: Mainly VFR. Brief restrictions will be 
possible mid to late week in late night/early morning low
clouds.

&&

.MARINE...
Tonight: Breezy south to southwest winds will shift westerly 
late as a cold front moves south toward the SC coast. Seas 
should average 2-3 feet, highest east.

Monday through Friday: Wind directions will be a bit variable on 
Monday as a cold front lingers in the vicinity. High pressure will 
build in from the north Monday night, allowing onshore flow to 
develop. Speeds will be a solid 15 knots across the waters on 
Tuesday as the pressure gradient remains enhanced. A light to 
moderate southerly component should then prevail into late week as 
the high shifts into the Atlantic, with typical diurnal enhancement 
along the land/sea interface and the SC Intra-Coastal.

&&

.FIRE WEATHER...
A Fire Danger Statement remains in effect for the entire area
until 8 PM tonight due to the elevated fire danger risk. 
While relative humidity values are forecast to drop to 25-30% 
Monday afternoon, winds are expected to be lower than on Sunday.
Thus, have opted to hold off on a Fire Danger Statement at this
time. 

&&

.TIDES/COASTAL FLOODING...
Shallow coastal flooding will be possible with the evening high 
tide cycle through at least mid week, especially along the SC
coast.

&&

.EQUIPMENT...
WFO Charleston SC will only conduct upper-air soundings at 12Z 
until further notice due to a shortage of helium.

&&

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

&&

$$
NEAR TERM...RJB
SHORT TERM...
LONG TERM...
AVIATION...RJB
MARINE...RJB
FIRE WEATHER...
TIDES/COASTAL FLOODING...
EQUIPMENT...