South Santee River to Edisto Beach, SC Marine Forecast
|Tonight...Variable Winds 5 To 10 Kt, Becoming S. Seas 1 To 2 Ft.|
|Mon...S Winds 5 To 10 Kt. Seas 2 Ft. A Slight Chance Of Showers And Tstms In The Afternoon.|
|Mon Night...Sw Winds 10 To 15 Kt. Seas 2 To 3 Ft. A Slight Chance Of Tstms. A Chance Of Showers In The Evening, Then Showers Likely After Midnight.|
|Tue...Sw Winds 10 To 15 Kt, Increasing To 15 To 20 Kt In The Afternoon. Seas 3 To 4 Ft. Showers Likely With A Chance Of Tstms.|
|Tue Night...Sw Winds 15 To 20 Kt. Seas 4 To 5 Ft. Showers Likely. A Chance Of Tstms, Mainly In The Evening.|
|Wed...Sw Winds 10 To 15 Kt. Seas 3 To 4 Ft. Showers Likely With A Chance Of Tstms.|
|Wed Night...Sw Winds 10 To 15 Kt, Diminishing To 5 To 10 Kt After Midnight. Seas 3 To 4 Ft. Showers Likely. A Chance Of Tstms, Mainly In The Evening.|
|Thu...Se Winds 5 To 10 Kt. Seas 3 Ft. Showers Likely With A Chance Of Tstms.|
|Thu Night...S Winds 10 Kt. Seas 3 Ft. Showers Likely With A Chance Of Tstms.|
|Fri...S Winds 10 To 15 Kt. Seas 3 Ft. Showers Likely With A Chance Of Tstms.|
|Fri Night...Sw Winds 15 Kt. Seas 3 To 4 Ft. A Chance Of Showers And Tstms. Mariners Are Reminded That Winds And Seas Higher In And Near Tstms.|
|Area Forecast Discussion|
National Weather Service Charleston SC
1053pm EDT Sunday July 15 2018
Synopsis: A stationary front over southern Georgia will gradually dissipate through tonight. A cold front will move into the area mid week before stalling and then moving north as a warm front Friday.
Near Term - Until 6am Monday Morning
Tonight: Latest radar imagery indicates scattered showers with an isolated thunderstorm or two south of I-16 and west of the I-95. This precipitation activity is expected to dwindle over the next couple hours with the loss of daytime heating and the presence of weak wind shear. However, plenty of moisture will remain in place during the overnight period as a light easterly wind gradually becomes south and continues to support PWATS around 2.0 inches and surface dewpts in the lower 70s, mainly in Southeast Georgia. Given the setup, a slight chance to chance of showers and/or thunderstorms will remain in the forecast early in Southeast Georgia, before a slight chance of a showers or thunderstorms gradually shift near the coast and/or offshore after midnight with weak h5 shortwave activity drifting over the Southeast United States. Overnight lows should dip into the lower 70s inland to mid/upper 70s near the coast.
Short Term - 6am Monday Morning Through Wednesday
Atlantic high pressure will prevail while an inland trough strengthens Tuesday ahead of a cold front which will approach the area Wednesday. Deep moisture along with upper troughing will support above normal rain chances, some of which could result in locally heavy rainfall and possible flooding. Instability looks to remain limited through the period along with deep layer shear so overall the severe storm risk should be low. Temperatures should be near to slightly above normal, especially lows. Heat indices will be near 100 degrees Monday and then closer to 105 degrees Tuesday and Wednesday for most of the area, although remaining below Heat Advisory levels
Long Term - Wednesday Night Through Sunday
A stationary front will hover over the region Wednesday night into Thursday and then lift northward as a warm front on Friday. With plenty of moisture across the region, the lift associated with the front will lead to periods of convection. Given the model trends and run to run consistency, POPs were increased.
Tonight: Weak high pressure will slowly build over the coastal waters, supporting quiet wind/sea conditions through the overnight period. In general, a light easterly wind will eventually become southerly, remaining at or below 10 kts. Seas will slowly subside to 1-3 ft.
Monday through Friday: Atlantic high pressure will prevail until a cold front moves into the area Thursday. The front will stall and then shift back northward as a warm front Friday. The increasing pressure gradient ahead of the front will lead to elevated winds/seas through Wednesday, although conditions should remain below Advisory levels
Tides / Coastal Flooding
Astronomical influences and onshore winds will produce elevated tides through at least Monday. Latest trends indicate light winds remaining more directly onshore during the time of high tide early tonight, resulting in slightly higher departures. Thus, minor coastal flooding is now likely along the Southeast Georgia coast as well as the Southeast South Carolina coast where a Coastal Flood Advisory is in effect until 1 AM. Minor coastal flooding is possible tomorrow night as well, mainly along the South Carolina coast
NOAA Charleston SC Office: Watches - Warnings - Advisories
GA...Coastal Flood Advisory until 1am EDT Monday for GAZ117-119- 139-141. SC...Coastal Flood Advisory until 1am EDT Monday for SCZ048>051. MARINE...None