895
FXUS62 KCHS 020001
AFDCHS
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
801 PM EDT TUE APR 1 2025
SYNOPSIS
A STATIONARY FRONT WILL LINGER NEARBY TO THE SOUTH OF THE AREA
INTO EARLY TONIGHT, BEFORE LIFTING NORTH AS A WARM FRONT LATER
TONIGHT AND WEDNESDAY. STRONG ATLANTIC HIGH PRESSURE WILL THEN
PREVAIL INTO THIS WEEKEND, BEFORE A COLD FRONT APPROACHES EARLY
NEXT WEEK.
NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/
AT 8 PM, KCLX DETECTED A WAVY SEA BREEZE JUST INLAND OF THE
RADAR SITE, PUSHING INLAND. DEWPOINTS IN THE WAKE THE SEA BREEZE
HAVE INCREASED INTO THE UPPER 60S A FEW LOCATIONS. IN ADDITION,
SEA FOG WAS EVIDENT ON SATELLITE AND WEB CAMS ALONG THE GA AND
LOWER SC COAST THIS EVENING. THE FOG WILL GRADUALLY INCREASE
INLAND THIS EVENING AND REMAIN OVERNIGHT. THE UPDATED FORECAST
WILL INCREASE THE MENTION OF FOG OVER SE GA AND LOWER SC ALONG
WITH THE ADJACENT ATLANTIC WATERS.
TONIGHT: UPPER LEVEL RIDGING IS EXPECTED TO FURTHER BUILD
ACROSS THE SOUTHEAST INTO THE ATLANTIC WATERS WITH SURFACE HIGH
PRESSURE MIGRATING TO THE ATLANTIC COAST. WEAK WARM ADVECTION IS
EXPECTED TO DEVELOP ACROSS THE REGION MAINLY DURING THE
OVERNIGHT HOURS, AND THERE MAY BE A FEW SHOWERS THAT MIGRATE
INTO THE FAR SOUTHERN PART OF THE LOCAL FORECAST AREA LATE. IN
ADDITION, GUIDANCE DOES SUGGEST THAT MARINE STRATUS/FOG COULD
PRESS BACK TOWARD THE COAST BRINGING STRATUS/FOG TO SOME COASTAL
AREAS. WILL NEED TO KEEP AN EYE ON THAT.
OTHERWISE, TEMPERATURES WILL DIP BACK INTO THE UPPER 50S TO
LOWER 60S, WARMEST ALONG THE COAST.
SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY/
SURFACE HIGH PRESSURE WILL MOVE OFF THE NORTHEAST UNITED STATES
COAST ON WEDNESDAY. MEANWHILE A PRONOUNCED INVERTED TROUGH WILL
DEVELOP OFF THE GA COAST AND MOVE INLAND DURING THE DAY. DECENT
MOISTURE AND INSTABILITY WILL DEVELOP ACROSS SOUTHEAST GA DURING
THE DAY. ISOLATED TO SCATTERED SHOWERS AND TSTMS COULD DEVELOP
IN ASSOCIATION WITH THE TROUGH AS IT MOVES INLAND DURING THE DAY
WEDNESDAY. HIGHS EXPECTED TO REACH THE LOW TO MID 80S.
DRY AND WARM WEATHER IS EXPECTED THURSDAY THROUGH FRIDAY AS DEEP
LAYERED RIDGING EXPANDS OVER THE AREA. HIGHS WILL BE IN THE MID
TO UPPER 80S THURSDAY AND UPPER 80S TO LOWER 90S ON FRIDAY. AT
THE COAST, TEMPS WILL BE CONSIDERABLY LOWER DUE TO A ROBUST
AFTERNOON SEA BREEZE BOTH DAYS.
LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/
RIDGING WILL PERSIST THROUGH SATURDAY NIGHT, THEN A LONGWAVE
TROUGH WILL PUSH EAST ON SUNDAY. A COLD FRONT WILL SLOWLY SWEEP
THROUGH SUNDAY NIGHT THROUGH MONDAY NIGHT, BRINGING A ROUND OF
SHOWERS AND THUNDERSTORMS. COOLER TEMPS EXPECTED BY EARLY NEXT
WEEK.
AVIATION /00Z WEDNESDAY THROUGH SUNDAY/
PRIOR TO THE 0Z TAFS, IR SATELLITE INDICATED A LARGE AREA OF SEA
FOG ALONG THE GA COAST, PUSHING ONSHORE. BASED ON SATELLITE
TRENDS, RESTRICTIVE CEILINGS MAY REACH KSAV BY 2Z, HIGHLIGHTED
WITH A TEMPO FROM 2-5Z. MOS AND FORECAST SOUNDINGS INDICATE THAT
IFR CEILINGS MAY SPREAD NORTH ACROSS KCHS AND KJZI BY 8Z. ONCE
THE LOW CEILINGS REACH THE TERMINALS IT SHOULD CONTINUE TO
AROUND DAYBREAK. A SEA BREEZE IS TIMED TO PASS OVER THE
TERMINALS EARLY WEDNESDAY AFTERNOON, DEVELOPING SOUTHEAST WINDS
OF 10 TO 15 KTS WITH GUSTS BETWEEN 20-25 KTS.
EXTENDED AVIATION OUTLOOK: CEILING RESTRICTIONS POSSIBLE
WEDNESDAY NIGHT AND AGAIN THURSDAY NIGHT.
MARINE
UPDATE: A LARGE AREA OF SEA FOG WAS EVIDENT ON SATELLITE ACROSS THE
GEORGIA AND LOWER NEARSHORE SOUTH CAROLINA WATERS EARLY THIS
EVENING. VISIBILITY OVER THE WATERS COULD FALL TO A HALF MILE OR
LESS AT TIMES. THE FOG IS EXPECTED TO PERSIST THROUGH THIS EVENING
INTO TONIGHT. A DENSE FOG ADVISORY HAS BEEN ISSUED THROUGH
TONIGHT.
TODAY: SOME PATCHY FOG MAY MOVE FROM INLAND AREAS ONTO THE
NEAR-SHORE WATERS THIS MORNING, ESPECIALLY FOR AREAS SOUTH OF
SAVANNAH. THE FOG SHOULD DISSIPATE BY THE LATE MORNING HOURS,
LEADING TO NO SIGNIFICANT MARINE CONCERNS FOR THE REST OF THE
PERIOD.
ATLANTIC HIGH PRESSURE WILL EXPAND OVER THE AREA WEDNESDAY
THROUGH SATURDAY NIGHT WITH WINDS/SEAS GENERALLY BELOW ADVISORY
LEVELS. THE EXCEPTION WILL BE WEDNESDAY NIGHT INTO THURSDAY WHEN
SOME 6 FT SEAS COULD SNEAK INTO THE OFFSHORE GA WATERS,
REQUIRING A SHORT-DURATION SMALL CRAFT ADVISORY.
CLIMATE
RECORD HIGH TEMPERATURES:
APRIL 5:
KSAV: 90/1988
APRIL 6:
KSAV: 90/1967
RECORD HIGH MINIMUM TEMPERATURES:
APRIL 3:
KCHS: 67/2012
KCXM: 68/2012
KSAV: 68/2012
APRIL 4:
KCHS: 70/1974
KCXM: 69/1974
KSAV: 69/1974
APRIL 5:
KCHS: 65/2017
KCXM: 67/2023
KSAV: 66/1957
APRIL 6:
KCHS: 68/2023 KSAV: 68/2023
CHS WATCHES/WARNINGS/ADVISORIES
GA...NONE.
SC...NONE.
MARINE...DENSE FOG ADVISORY UNTIL 8 AM EDT WEDNESDAY FOR AMZ352-354-374.
NEAR TERM...ADAM/NED
SHORT TERM...JRL
LONG TERM...JRL
AVIATION...NED
MARINE...ADAM/JRL/NED
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