FXUS62 KCHS 301703 AFDCHS
Area Forecast Discussion National Weather Service Charleston SC 103 PM EDT Mon Mar 30 2026
.WHAT HAS CHANGED...
Very little changes with this forecast update. The Aviation Section has been updated for the 18Z TAF issuance.
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.KEY MESSAGES...
- 1) Prevailing high pressure will yield minimal rain chances
through mid-week with above normal temperatures.
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.DISCUSSION...
KEY MESSAGE 1: Prevailing high pressure will yield minimal rain chances through mid-week with above normal temperatures.
While broad upper-lvl ridging strengthens through the course of the week, sfc high pressure will continue to dominate the local area. As a result, southeasterly flow will yield warm temperatures through the end of the week, with the latest guidance supporting high temps. in the low to mid 80s (away from the coastline). Luckily, this will also advect some moisture back into the region as dewpoints are expected to range from the mid 50s to low 60s. While it's suppose to remain rain-free through mid-week, there is chance of some light precip. across the interior counties on Wednesday afternoon as weak h5 vort. energy passes through.
A cold front could approach the region towards the end of the week, yielding a greater chance for measurable rainfall this weekend.
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.AVIATION /18Z MONDAY THROUGH SATURDAY/...
VFR conditions will prevail at CHS/JZI/SAV terminals through 18Z Tuesday.
Extended Aviation Outlook: VFR conditions are expected at CHS/JZI/SAV terminals through mid-week. TEMPO flight restrictions remain possible at all terminals this weekend as a cold front approaches the region.
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.MARINE...
Through Tonight: As high pressure continues to dominate the weather pattern across the Southeastern CONUS, expect light northeasterly winds to turn more southerly through the late evening and overnight hours. As southeasterly swell continues to taper back, expect 5 to 7 ft seas across the outer Georgia waters to linger into the overnight. Therefore, a Small Craft Advisory remains in effect into Tues. morning.
Extended Marine: Expect high pressure to persist across the region through the late week, supporting mostly tranquil marine conditions (below Small Craft Advisory criteria). It is possible to see some 6 footers in the outer Georgia waters on Thursday night into Friday as a cold front approaches the Atlantic waters late this week.
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.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None. SC...None. MARINE...Small Craft Advisory until 8 AM EDT Tuesday for AMZ374.
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Dennis