textproduct: Charleston

WHAT HAS CHANGED

All sections have been updated.

KEY MESSAGES

- 1) A slow-moving front will drift into the area from the north and bring increased chances for showers and thunderstorms Friday into the weekend. Locally heavy rainfall will be possible and could bring a risk of flooding to portions of our area.

DISCUSSION

KEY MESSAGE 1: A slow-moving front will drift into the area from the north and bring increased chances for showers and thunderstorms Friday into the weekend. Locally heavy rainfall will be possible and could bring a risk of flooding to portions of our area.

A cold front will slowly drift southward towards our region on Friday, then transition into a stationary front over or nearby through the weekend. There will be deep moisture associated with this front. PWATs could make a run for 2.5" this weekend, which is well above the 90% mark for CHS Sounding Climatology, and may be approaching 3 standard deviations per NAEFS. This deep moisture combined with lift from the front will generate widespread showers and embedded thunderstorms. Efficient rainfall production, especially within thunderstorms, will increase the potential for localized flooding. While most flooding impacts are expected to remain minor, repeated heavy downpours over urban areas, such as the Charleston or Savannah Metro areas, could warrant Flood Advisories and/or Flash Flood Warnings. Rainfall totals of 1-3" appear likely, especially across parts of southeast South Carolina and lesser amounts across southeast Georgia. Locally higher amounts will occur where there is training of thunderstorms. The Weather Prediction Center (WPC) highlighted portions of our area with a Slight Risk for excessive rainfall Friday and Saturday.

AVIATION /18Z THURSDAY THROUGH TUESDAY/

18Z TAFs: VFR with winds mainly associated with the sea breeze.

Extended Aviation Outlook: A front nearby will bring periods of flight restrictions within showers/thunderstorms.

MARINE

Tonight through Tuesday: Light to moderate winds should continue across our waters tonight as a cold front approaches from the north. It'll transition into a stationary front over or nearby this weekend, yielding increased showers and thunderstorms. Despite the front, marine conditions should remain below Small Craft Advisory criteria.

Rip Currents: There is a Moderate Risk for rip currents for the Charleston County beaches through this evening.

CHS WATCHES/WARNINGS/ADVISORIES

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