textproduct: Charleston

WHAT HAS CHANGED

All sections have been updated.

KEY MESSAGES

- 1) Risk for locally heavy rainfall to persist overnight. - 2) Minor coastal flooding expected again Sunday morning across coastal portions of Charleston and Colleton Counties. - 3) There is a high risk for rip currents along the Charleston County beaches for Sunday.

DISCUSSION

KEY MESSAGE 1: Risk for locally heavy rainfall will persist overnight.

The tornado risk is ending and the remaining portions of Tornado Watch 679 will be allowed to expire. Deep, tropical moisture remains in place. The risk for some locally heavy rainfall will linger for a few more hours and a Flood Watch continues through 2 AM Sunday. However, the risk for flash flooding is waning and any flooding will likely limited to minor flooding of low-lying and poor drainage areas. Some spots have picked up over 4" of rain today.

KEY MESSAGE 2: Minor coastal flooding expected again Sunday morning across coastal portions of Charleston and Colleton Counties.

Tides in the Charleston Harbor are expected to reach into the minor flood category with high tide Sunday morning. Another Coastal Flood Advisory may be needed.

KEY MESSAGE 3: There is a high risk for rip currents along the Charleston County beaches for Sunday.

Lingering elevated swell and gusty winds will support a high risk for rip currents along the Charleston County beaches through Sunday evening. The risk is moderate for all other beaches.

AVIATION /00Z SUNDAY THROUGH THURSDAY/

11/00z TAFs: Cigs will waiver from VFR to MVFR for much of the night before settling into MVFR prior to daybreak. Cigs will lift to VFR by mid-morning as a cold front shifts through. Winds will be gusty for much of the daytime period with gusts >20 kt possible. A band of showers and possibly a tstm could accompany the cold front has it pushes through during the morning. Any impacts will be brief, so VCSH was used 14-17z at KCHS and KJZI with 10-13z at KSAV.

Extended Aviation Outlook: No high confidence concerns through the upcoming week.

MARINE

Tonight: The strongest 850 mb winds have pushed north of the area a bit faster than expected this afternoon, and winds are mostly moderate across the waters, with a relatively relaxed gradient expected to persist through this evening. As such, Gale Warnings have been downgraded to Small Craft Advisories. Winds begin to increase again overnight ahead of an approaching cold front, with gusts to 25 kt common across the coastal waters again by the early morning hours.

Sunday into Tuesday: Remnants of Isaias combined with a surface high pressure offshore should keep winds breezy on Sunday and Small Craft Advisory will likely persist for portions of the coastal waters into Sunday night, with the potential for continuing into Monday. Thereafter, expect these marine conditions to become almost tranquil as we head into early next week.

CHS WATCHES/WARNINGS/ADVISORIES

GA...Flood Watch until 2 AM EDT Sunday for GAZ087-088-099>101-114- 115-137-216>219-238>241. SC...Flood Watch until 2 AM EDT Sunday for SCZ040-042>045-147>152. High Risk for Rip Currents through Sunday evening for SCZ150. MARINE...Small Craft Advisory until 11 PM EDT Sunday for AMZ360-362. Small Craft Advisory from 11 PM this evening to 2 PM EDT Sunday for AMZ364. Small Craft Advisory until 8 PM EDT Sunday for AMZ384.