textproduct: Charleston

WHAT HAS CHANGED

The Aviation Section was updated to reflect the 12Z TAFs.

KEY MESSAGES

- 1) A weak cold front will push through the region on Thursday ushering dry conditions with temperatures near and/or above normal through the weekend.

DISCUSSION

KEY MESSAGE 1: A weak cold front will push through the region on Thursday ushering dry conditions with temperatures near and/or above normal through the weekend.

The mid-levels will feature troughing over the eastern CONUS today, with a shortwave trough rippling across the southern extent. At the surface a weak cold front will approach the local region, pushing through Thursday morning. Light to moderate showers will be possible today across SE GA where enough moisture and forcing from the shortwave trough will allow precipitation to develop. Areas across SE SC will likely remain dry today, although a stray isolated shower cannot be ruled out. Thursday the cold front will be quickly shifting off our coast in the morning, with little to no rainfall expected. High pressure will build from the northwest through the afternoon, bringing drier conditions. Temperatures in the lower to middle 80s along with lowering dew points will cause afternoon RH values to fall into the near critical range (25-30%) away from the immediate coast. However, winds won't be breezy enough to increase fire weather concerns. Friday will be similar with dry conditions, high temperatures near normal, near critical RH values in the afternoon away from the immediate coast, with lighter winds. The weekend into the first part of next week should remain dry. with high temperatures above normal.

AVIATION /12Z WEDNESDAY THROUGH SUNDAY/

Prevailing VFR at KCHS/KJZI/KSAV through the 12Z TAF period. Some brief moments of MVFR cigs are possible this morning at KJZI, with a TEMPO group accounting for that this morning. Otherwise, an isolated shower could impact KSAV this afternoon, however confidence in any direct impacts was too low to include mention at this time.

Extended Aviation Outlook: VFR.

MARINE

Today and Tonight: Winds across the marine waters have diminished to below Small Craft Advisory levels and seas have dropped below 6ft in the nearshore waters. Therefore, the Small Craft Advisories in effect for these waters has been canceled. An SCA remains in the 20 to 60 nm offshore GA waters for 6ft seas through this afternoon. Otherwise, the remainder of today will feature NE winds gusting to around 15 knots and seas 4 to 5 ft.

Extended Marine: A weak cold front will be moving offshore Thursday morning, followed by High pressure building in from the northwest. The High will pass overhead on Friday, then move into the Atlantic for the weekend. Winds and seas will remain below Small Craft Advisory thresholds during the extended time period.

Rip Currents: Thursday: There will remain a 2-3 ft swell around 7 seconds at our beaches. Internal calculations point to a Low Risk at all of our beaches. However, RCMOS points to a borderline Low/Moderate Risk along our SC beaches and a Moderate Risk along our GA beaches during the daylight hours. Since Tybee, GA is prone to rip currents, we upped the risk to Moderate for our GA beaches, but left the risk Low for our SC beaches.

EQUIPMENT

The KCLX radar remains offline for maintenance.

Users of KCLX radar data are urged to use adjacent WSR-88D sites which also cover much of Southeast South Carolina, Southeast Georgia and the adjacent coastal waters. These include:

KCAE - Columbia, SC KLTX - Wilmington, NC KJAX - Jacksonville, FL KVAX - Moody AFB, GA KJGX - Robbins AFB, GA

CHS WATCHES/WARNINGS/ADVISORIES

GA...None. SC...None. MARINE...Small Craft Advisory until 4 PM EDT this afternoon for AMZ384.