Edisto Beach, SC to Savannah, GA Marine Forecast
|Tonight...W Winds 10 To 15 Kt With Gusts To 20 Kt, Becoming Nw 5 To 10 Kt Late. Seas 2 To 3 Ft.|
|Tue...Nw Winds 5 To 10 Kt, Becoming Sw In The Afternoon. Seas 2 Ft In The Morning, Then Seas 1 Foot.|
|Tue Night...Sw Winds 10 To 15 Kt. Seas 2 To 3 Ft.|
|Wed...W Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt In The Afternoon. Seas 2 To 3 Ft.|
|Wed Night...Nw Winds 5 To 10 Kt. Seas 2 Ft.|
|Thu...W Winds 5 To 10 Kt, Becoming Sw 10 To 15 Kt With Gusts To 20 Kt In The Afternoon. Seas 2 To 3 Ft. A Slight Chance Of Showers In The Afternoon.|
|Thu Night...Sw Winds 15 Kt With Gusts To 20 Kt. Seas 2 To 3 Ft. A Chance Of Showers.|
|Fri...W Winds 10 To 15 Kt. Seas 2 To 3 Ft. A Chance Of Showers.|
|Fri Night...Nw Winds 10 To 15 Kt. Seas 2 To 3 Ft. A Chance Of Showers.|
|Sat...Ne Winds 10 To 15 Kt. Seas 3 To 4 Ft. A Slight Chance Of Showers.|
|Sat Night...Ne Winds 10 To 15 Kt. Seas 2 To 3 Ft.|
| Area Forecast Discussion|
National Weather Service Charleston SC
313pm EST Monday Jan 18 2021
High pressure will prevail through the middle of the week. A weak cold front is expected to pass through the region on Friday, followed by high pressure for the weekend.
Near Term - Until 6am Tuesday Morning
The surface high will settle directly over the area tonight. Gusty winds this afternoon will quickly settle down early this evening with calm or light winds by mid-evening away from the coast. Crystal clear skies are on tap so great radiational cooling is in store. Temperatures will dip below freezing across the western half of the forecast area with readings around 40 at the coast.
Short Term - 6am Tuesday Morning Through Thursday
Tuesday: The mid-levels will consist of mainly zonal flow. At the surface, high pressure will prevail across the region. A cold front will approach the region from the northwest during the day. Though, it'll dissipate as it impacts the high, with the remnants of the front moving through our area overnight. No rain is expected from the front because dry air will remain firmly in place. Only high clouds are expected during the evening and overnight. Temperatures will be near normal during the day, then a few degrees above normal overnight due to the increasing clouds.
Wednesday: A shortwave will pass to our north during the morning, becoming a strengthening trough offshore in the afternoon. It'll move further offshore with time, with west northwest flow prevailing overhead. Surface high pressure will prevail over the Southeast, bringing dry conditions. Expect mostly sunny skies during the day, with increasing high clouds from the west overnight. Temperatures should be a few degrees above normal during the day and near normal at night.
Thursday: West northwest flow prevails in the mid-levels. Surface high pressure centered over the Southeast in the morning will shift over Southern FL and the Bahamas in the afternoon. Meanwhile, a front/disturbance will approach from the west. Moisture is expected to increase by late in the afternoon, with PWATs (Precipitable Waters) approaching 1.25". Models are mixed on the shower potential for our area. Some keep our area mostly dry while others have measurable precipitation everywhere in the afternoon. Given the abundant dry air in place. We expect it'll take some time before the showers make it into our area. It'll probably be late in the afternoon when far inland locations start seeing isolated to scattered light showers. Meanwhile, the coast may stay dry all day. Warm air advection and some breaks in the clouds should yield temperatures in the low to maybe mid 60s.
Long Term - Thursday Night Through Monday
A weak, slow-moving cold front associated with a low approaches the region from the west Friday. Showers associated with the weak low/cold front are possible Friday into Saturday morning. Thereafter, high pressure is expected to briefly build in the wake of the front before a second, stronger front approaches the area. A line of showers could pass over the region Tuesday ahead of the front. Slightly above normal temps will persist Friday with highs in the 60s, whereas Saturday, temperatures should return to near normal as a slightly cooler air mass moves over the area. A warming trend will continue in the following days before a second cold front approaches.
Surface winds will steadily diminish late this afternoon and this evening as the low-level ridge axis builds over the area. However, some 20 kt gusts are still possible over outer reaches of the SC nearshore waters overnight due to stronger low-level winds just north of the area.
High pressure will prevail across the region through the middle of the week. A cold front will dissipate as it impacts the high, with the remnants of the front moving through our area Tuesday night into Wednesday morning. This will cause the surface pressure gradient to steepen, leading to elevated winds. Wind gusts could briefly hit 25 kt across the easternmost portion of the Charleston waters during that time period. Conditions will improve later Wednesday. Though, winds start to increase again later Thursday as a cold front slowly approaches from the west. Gusts could approach 25 kt and some portions of the waters could meet Small Craft Advisory conditions. The front is expected to move offshore late Friday, with winds/seas lowering beyond that.
NOAA Charleston SC Office: Watches - Warnings - Advisories
GA...None. SC...None. MARINE...None.