717
FXUS62 KCHS 211819
AFDCHS
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
219 PM EDT TUE APR 21 2026
WHAT HAS CHANGED
ALL SECTIONS UPDATED.
KEY MESSAGES
- 1) RAIN-FREE CONDITIONS DOMINATE THIS WEEK AS HIGH PRESSURE
PREVAILS.
DISCUSSION
KEY MESSAGE 1: RAIN-FREE CONDITIONS DOMINATE THIS WEEK AS HIGH
PRESSURE PREVAILS.
QUIET WEATHER CONDITIONS WILL REMAIN ACROSS THE REGION AS SFC HIGH
PRESSURE NUDGES ACROSS THE AREA FROM THE NEARBY ATLANTIC UNDER
RIDGING BUILDING ALOFT. HIGH TEMPS REMAIN ON TRACK TO BE NEAR NORMAL
THIS AFTERNOON, PEAKING AROUND THE UPPER 70S NORTH TO LOWER 80S
ALONG/SOUTH OF THE I-16 CORRIDOR. HIGH TEMPS ARE EXPECTED TO WARM
ABOVE NORMAL MID TO LATE WEEK AS A SOUTHWEST WIND OCCURS UNDER BROAD
RIDGING ALOFT, REACHING THE MID-UPPER 80S AWAY FROM COASTAL AREAS.
UNFORTUNATELY, NO RAINFALL IS FORECAST ACROSS THE LOCAL AREA UNTIL A
FRONT ARRIVES LATE WEEKEND AND MOISTURE RETURN REMAINS MODEST,
SUGGESTING RH VALUES DROPPING INTO THE 20S WEST OF I-95 EACH
AFTERNOON THROUGH FRIDAY. WHILE RH VALUES ARE CRITICAL, WINDS ARE
EXPECTED TO TOP OUT IN THE 10-15 MPH RANGE (MOSTLY NEAR THE COAST
WITH A SEA BREEZE), THUS NO FIRE WEATHER HEADLINES ARE IN EFFECT AT
THIS TIME. HOWEVER, ITS ENCOURAGED TO EXERCISE CAUTION IF BURNING
AND HEED ANY LOCAL BURN BANS AS CONDITIONS REMAIN VERY DRY DURING
THE WEEK.
AVIATION /18Z TUESDAY THROUGH SUNDAY/
VFR CONDITIONS WILL PREVAIL AT CHS/JZI/SAV TERMINALS THROUGH 18Z
WEDNESDAY. HOWEVER, A SEA BREEZE WILL RESULT IN NORTHEAST WINDS
TURNING TO SOUTHWEST THIS AFTERNOON AT ALL TERMINALS, WITH WIND
SPEEDS GENERALLY REMAINING BELOW 10 KT.
EXTENDED AVIATION OUTLOOK: VFR CONDITIONS WILL PREVAIL AT
CHS/JZI/SAV TERMINALS THROUGH FRIDAY WITH A SEA BREEZE LIKELY TO
OCCUR EACH AFTERNOON. A FEW SHOWERS AND/OR THUNDERSTORMS COULD IMPACT
THE TERMINALS LATE SATURDAY.
MARINE
HIGH PRESSURE CENTERED ACROSS THE MID-ATLANTIC WILL SLOWLY SHIFT
SOUTH WITH A WEAKENING COLD FRONT DURING THE NEXT FEW DAYS, FAVORING
IN A SOUTHERLY FLOW ACROSS LOCAL WATERS FOR MUCH OF THE WEEK. WIND
SPEEDS SHOULD GENERALLY REMAIN AROUND 10-15 KT OR LESS WITH SOME
SLIGHT ENHANCEMENT ALONG THE LAND/SEA INTERFACE WHERE A DAILY SEA
BREEZE DEVELOPS, THEN SHIFTS INLAND. SEAS BETWEEN 2-4 FT THIS
AFTERNOON (LARGEST ACROSS OUTER GEORGIA WATERS) SHOULD RANGE BETWEEN
2-3 FT WEDNESDAY THROUGH LATE WEEK. A FEW SHOWERS AND THUNDERSTORMS
COULD ARRIVE THIS WEEKEND.
CHS WATCHES/WARNINGS/ADVISORIES
GA...NONE.
SC...NONE.
MARINE...NONE.
DPB
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