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[Printable]
733
FXUS62 KCHS 250522
AFDCHS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
122 AM EDT SAT OCT 25 2014

.SYNOPSIS...
HIGH PRESSURE WILL PREVAIL THROUGH SATURDAY. A DRY COLD FRONT WILL
DISSIPATE OVER OR NORTH OF THE AREA SUNDAY FOLLOWED BY UNSEASONABLY
WARM HIGH PRESSURE THROUGH THE MIDDLE OF NEXT WEEK.

&&

.NEAR TERM /UNTIL 6 AM THIS MORNING/...
A POTENT SHORTWAVE WAS SHIFTING OFF THE SE GEORGIA COAST AND
STRONG SUBSIDENCE ALOFT WAS EXPANDING OVER THE FORECAST AREA WITH
CLOUDS IN COASTAL SOUTH CAROLINA CLEARING RAPIDLY. LOWS WILL RANGE
FROM THE LOWER 40S INLAND TO THE MID-UPPER 40S JUST INLAND FROM
THE COAST WITH LOWER-MID 50S AT THE BEACHES...DOWNTOWN CHARLESTON
AND AROUND THE SANTEE LAKES.

&&

.SHORT TERM /6 AM THIS MORNING THROUGH MONDAY/...
HIGH PRESSURE WILL WEAKEN SATURDAY AS A COLD FRONT BEGINS TO
APPROACH FROM THE NORTHWEST BUT THE FRONT WILL DISSIPATE AS IT NEARS
THE AREA EARLY SUNDAY. HIGH PRESSURE WILL THEN RETURN MONDAY. ALL IN
ALL DRY WEATHER IS EXPECTED WITH VERY LIMITED MOISTURE AVAILABLE.
THIS WILL LEAD TO BIG DIURNAL TEMPERATURE RANGES...GENERALLY 25-30
DEGREES BETWEEN OVERNIGHT LOWS NEAR 50/LOWER 50S AND HIGHS IN THE
LOWER TO MID 80S. THE ONSHORE FLOW MONDAY SHOULD KEEP TEMPS BELOW
THE RECORD HIGHS IN THE UPPER 80S AT KCHS/KSAV AND MID 80S AT KCXM.

&&

.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
THE EXPANSIVE UPPER LEVEL RIDGE WILL SLOWLY SHIFT EAST WHILE A BROAD
TROUGH PATTERN DEVELOPS MID-WEEK. A WEAK SURFACE TROUGH MAY SET UP
OFF THE GA COAST TUESDAY NIGHT INTO WEDNESDAY NIGHT WITH ISOLATED
SHOWERS POSSIBLE. LARGE MODEL DIFFERENCES EXIST THURSDAY INTO FRIDAY
REGARDING AN UPPER VORT DROPPING TOWARD THE MID-ATLANTIC REGION.
THERE ARE HINTS AT A COLD FRONT MOVING INTO THE CAROLINAS THURSDAY
AND MOVING OFFSHORE BY FRIDAY MORNING. HOWEVER THE LOW AND MID
LEVELS DO NOT LOOK VERY MOIST SO WE CURRENTLY ONLY SHOW SLIGHT
CHANCE POPS THURSDAY AND THURSDAY NIGHT. FAIRLY WARM TEMPS WILL
CONTINUE TUESDAY THROUGH THURSDAY WITH HIGHS IN THE 80S AND LOWS IN
THE 50S. A COOL DOWN IS EXPECTED FRIDAY WITH HIGHS IN THE UPPER 70S.

&&

.AVIATION /05Z SATURDAY THROUGH WEDNESDAY/...
VFR.

EXTENDED OUTLOOK...VFR CONDITIONS SHOULD PREVAIL.

&&

.MARINE...
TONIGHT...LIGHT WINDS WILL BECOME NORTH AND INCREASE TO 5-10 KT
OVERNIGHT AS SHORTWAVE ENERGY PUSHES THROUGH. SEAS WILL AVERAGE
1-3 FT.

SATURDAY THROUGH WEDNESDAY...HIGH PRESSURE TO THE WEST WILL SLIDE
OFFSHORE THIS WEEKEND AND PERSIST INTO THE MIDDLE OF NEXT WEEK. THIS
WILL LEAD TO OFFSHORE WINDS BECOMING ONSHORE MONDAY WITH WINDS
GENERALLY 10 KT OR LESS AND SEAS 3 FT OR LESS.

&&

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

&&

$$

NEAR TERM...
SHORT TERM...
LONG TERM...
AVIATION...
MARINE...







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