textproduct: Charleston

WHAT HAS CHANGED

All sections have been updated.

KEY MESSAGES

- 1) Rain chances increase Friday, especially inland, though no hazardous weather is anticipated.

DISCUSSION

KEY MESSAGE 1: Rain chances increase Friday, especially inland, though no hazardous weather is anticipated.

Aloft, deep ridging will remain in place across the western Atlantic and the Southeast U.S. At the surface, a cold front strewn across the Tennessee Valley Thursday will slowly sag south into Central Georgia and South Carolina Friday as a wedge pattern develops. Trends still favor a strong Atlantic ridge, which will keep the front displaced just north and west of the forecast area. The front is then expected to lift north as a warm front Saturday.

The nearby boundary will bring an uptick in moisture along with increasing rain chances Friday through at least the weekend. The greatest rain chances will generally be confined to areas farther inland near the front. Meanwhile, ridging aloft will limit convection along the coastal areas, which could remain completely dry through at least the weekend. Regarding severe weather, the better moisture and instability are also expected to remain to the north and west. Combined with weak large-scale forcing and shear, the severe weather threat remains low through at least the weekend.

AVIATION /18Z WEDNESDAY THROUGH MONDAY/

20/18z TAF Discussion: KCHS/KJZI/KSAV: VFR for the period. Gusty winds will occur with the passage of the sea breeze this afternoon. Shallow ground fog will be possible again at all terminals early Thursday morning.

Extended Aviation Outlook: There are no high confidence concerns.

MARINE

Through tonight: East-southeasterly winds at 5 to 10 kt persists through the evening as an Atlantic high pressure system situates itself offshore. Modest east-southeasterly swell continues to hold steady across the local waters through the rest of the evening with seas ranging from 2 to 3 ft in the nearshore waters (0-20 nm) and 3 to 4 ft in the offshore waters (20-60 nm). Marine conditions should stay quite tranquil through the remainder of the period.

Extended Marine: As high pressure continues to drive onshore east- southeasterly flow throughout the weekend, marine conditions are expected to remain quite with wind speeds topping out in the 10 to 15 kt range. Seas will range from 2 to 4 ft throughout the period.

Rip Currents: A lingering 9 sec, 2 to 3 ft swell will keep a Moderate Risk of rip currents in place for all beaches through this evening.

CHS WATCHES/WARNINGS/ADVISORIES

GA...None. SC...None. MARINE...None.