FXUS62 KCHS 172300 AFDCHS
Area Forecast Discussion National Weather Service Charleston SC 700 PM EDT Tue Mar 17 2026
.WHAT HAS CHANGED...
The Aviation section has been updated for the 00z TAF issuance.
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.KEY MESSAGES...
- 1) Frost/freeze is possible tonight through Wednesday night.
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.DISCUSSION...
KEY MESSAGE 1: Frost/freeze is possible tonight through Wednesday night.
A more widespread freeze is expected across southeast South Carolina and Georgia tonight. Temperatures are expected to drop into the upper 20s to low 30s late tonight into Wednesday morning across a majority of the area, roughly along and west of Highway 17. A Freeze Warning remains in effect. Areas that do not have a Freeze Warning in place, Beaufort County and south along the immediate Georgia coast, should not see much frost as there should be enough gradient wind present to prevent formation.
There will be a risk for a frost or freeze again Wednesday night into Thursday morning. NBM currently shows a 30-50% chance for temperatures to drop to freezing or below over our interior area, mainly west of I-95 and north of I-16. Outside of the areas, patchy frost could develop if winds are able to drop off. Additional Freeze Warnings and/or Frost Advisories will be possible.
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.AVIATION /00Z WEDNESDAY THROUGH SUNDAY/...
VFR conditions will prevail at KCHS, KJZI, and KSAV through 00Z Thursday.
Extended Aviation Outlook: VFR conditions are expected to prevail.
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.MARINE...
Tonight through Sunday: No marine concerns. Winds could briefly peak to 15-20 kt at times, however conditions are forecast to remain below Small Craft Advisory criteria through the week.
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.EQUIPMENT...
The KCLX radar is scheduled for radome panel replacement March 17-20, 2026. The radar will be down during this time. Users are encouraged to use data from the following nearby radar sites during the maintenance outage:
KCAE - Columbia, SC KLTX - Wilmington, NC KJAX - Jacksonville, FL KVAX - Moody AFB, GA KJGX - Robbins AFB, GA
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.CHS WATCHES/WARNINGS/ADVISORIES...
GA...Freeze Warning from midnight tonight to 10 AM EDT Wednesday
for GAZ087-088-099>101-114>116-118-137-138-140.
SC...Freeze Warning from midnight tonight to 10 AM EDT Wednesday
for SCZ040-042>045-047-049-050-052.
MARINE...None.
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BRS/ETM