textproduct: Charleston

WHAT HAS CHANGED

KEY MESSAGE 3 has been changed to KEY MESSAGE 1. The Aviation Section has been updated for the 00Z TAF issuance. The Marine Section has been updated to remove the Small Craft Advisory along the Charleston County Coast.

KEY MESSAGES

- 1) Rain chances will increase from mid-week through the weekend, though no significant impacts are expected at this time.

DISCUSSION

KEY MESSAGE 1: Rain chances will increase from mid-week through the weekend, though no significant impacts are expected at this time.

A surface low tracking across portions of Tennessee and the Ohio River Valley could bring periods of scattered showers and isolated thunderstorms Wednesday into Thursday morning. Instability remains limited, so any thunderstorms that develop are expected to be weak and non-severe, with low potential for significant impacts.

Another system could affect the region early this weekend, bringing another round of rain chances. Similarly, the risk of hazardous weather remains low at this time.

AVIATION /00Z TUESDAY THROUGH SATURDAY/

MVFR conditions could persist for a few hours at SAV this evening due to low stratus drifting onshore. A TEMPO MVFR group has been added between 00-02Z at SAV, but could need to be extended for an additional hour or two before conditions improve to VFR. MVFR cigs could also linger at JZI during the next hour, but should prevail VFR thereafter. VFR conditions are expected at CHS through the entire TAF period.

Extended Aviation Outlook: Showers and isolated thunderstorms associated with a cold front could bring flight restrictions Wednesday into Thursday morning.

MARINE

Tonight: East/northeasterly winds should generally gust up to 15-20 kt across a majority of local waters while high pressure persists across the region. Seas will generally range between 3-5 ft across nearshore waters and 5-7 ft across outer waters, likely to slowly subside during the night. Given the trend, a Small Craft Advisory across outer Georgia waters will likely come to an end late night, with conditions then expected to remain below Small Craft Advisory levels for all local waters through daybreak Tuesday.

Heading into Tuesday, the pressure gradient will weaken over the local waters as the high pressure shifts offshore. Marine conditions are expected to deteriorate Wednesday as a cold front approaches the region, and thus Small Craft Advisories could be needed once again. Winds could gust near 25 knots, with seas building to 3 to 5 ft. Another system this weekend could bring another period of elevated winds and seas, potentially leading to additional Small Craft Advisories.

CHS WATCHES/WARNINGS/ADVISORIES

GA...None. SC...None. MARINE...Small Craft Advisory until 5 AM EDT Tuesday for AMZ384.