South Santee River to Edisto Beach, SC Marine Forecast
|Tonight...Nw Winds 5 To 10 Kt. Seas 2 To 3 Ft.|
|Tue...Nw Winds 5 To 10 Kt. Seas 2 To 3 Ft.|
|Tue Night...Nw Winds 10 To 15 Kt. Seas 3 To 4 Ft.|
|Wed...Nw Winds 10 To 15 Kt, Diminishing To 5 To 10 Kt In The Afternoon. Seas 2 To 3 Ft.|
|Wed Night...N Winds 5 To 10 Kt. Seas 2 Ft.|
|Thu...Ne Winds 5 To 10 Kt. Seas 2 Ft.|
|Thu Night...Se Winds 5 Kt, Becoming Sw After Midnight. Seas 2 To 3 Ft.|
|Fri...W Winds 10 To 15 Kt. Seas 3 To 4 Ft.|
|Fri Night...Sw Winds 10 To 15 Kt. Seas 2 To 3 Ft. A Slight Chance Of Showers.|
|Sat...W Winds 10 To 15 Kt. Seas 2 Ft. A Chance Of Showers.|
|Sat Night...W Winds 10 To 15 Kt. Seas 2 To 3 Ft. A Chance Of Showers.|
Area Forecast Discussion|
National Weather Service Charleston SC
633pm EST Monday Nov 18 2019
A trough of low pressure will dissipate over the area tonight into Tuesday. High pressure will then prevail through late week, before a cold front impacts the region over the weekend.
Near Term - Through Tuesday
The shortwave has continued to shift away from the area this afternoon though the area of stratus has been slow to clear the Charleston Tri-County area. The low clouds will still slowly clearing out at sunset, though extensive high cirrus was overspreading the area from the west. Another upper shortwave is expected to rotate around the bottom of the longwave, potentially enhancing a weak surface trough over the area. Although no precipitation is anticipated, some low stratus and perhaps patchy fog could develop over northern portions of the area late tonight as a weak northerly flow develops. Overnight lows are expected to dip to the low to mid 40s.
Short Term - Tuesday Night Through Thursday
A potent mid level trough will swing through the area on Tuesday. At the surface, weak troughing over South Carolina will linger in the morning until the kick from the upper levels comes through. There will be some cloud cover around, but no precipitation is expected. Highs will be cooler than normal, mainly in the low to mid 60s. Lows Tuesday night will range from around 40 inland to upper 40s at the coast.
High pressure will build in both at the surface and aloft for Wednesday and Thursday. Deep dry air and subsidence noted in model soundings will preclude any rainfall. Should see plenty of sunshine with temperatures on a warming trend (although will still be slightly cooler than normal). Highs will mainly be in the mid to upper 60s. Lows Wednesday night again in the 40s.
Long Term - Thursday Night Through Monday
Strong high pressure will be off the Southeast Coast Thursday night into Friday, bringing dry conditions. A cold front will approach from the west late Friday. Models have come into somewhat of an agreement, showing the front bringing showers to our area as it moves through. Though, they disagree on whether it will be Saturday or Sunday. Most of the 00Z models leaned towards the Saturday solution, so that's what's reflected in the forecast. Following the front, high pressure is expected to build back into the region.
Seas over the offshore GA waters will gradually subside given the weak wind flow over the waters. Values should be below 6 ft by daybreak Tuesday so we made no changes to the ongoing Small Craft Advisory through 4 am.
Tuesday through Saturday: No marine concerns are expected through late week. Weak troughing will dissipate on Tuesday, with high pressure to build in its wake and then prevail through late week. Winds should average around 15 knots or less with seas 2 to 3 feet, highest in the outer Georgia waters. A cold front is expected to approach from the west late in the week.
Tides / Coastal Flooding
Moderate coastal flooding occurred at Charleston today with minor coastal flooding at Savannah. Storm surge is expected to drop off tonight into Tuesday so the chances for another round of flooding midday Tuesday are relatively low. It is not out of the realm of possibility that Charleston could briefly touch 7.0 ft MLLW early Tuesday afternoon.
NOAA Charleston SC Office: Watches - Warnings - Advisories
Small Craft Advisory until 4am EST Tuesday for AMZ374.