Edisto Beach, SC to Savannah, GA Marine Forecast
| Rest Of Today...S Winds 10 To 15 Kt. Seas 2 To 3 Ft. Wave Detail: Se 3 Ft At 9 Seconds. |
| Tonight...S Winds 10 To 15 Kt, Becoming Sw 5 To 10 Kt After Midnight. Seas 2 To 3 Ft. Wave Detail: S 3 Ft At 4 Seconds And Se 3 Ft At 9 Seconds. A Slight Chance Of Showers And Tstms In The Evening. |
| Sun...N Winds 10 To 15 Kt, Becoming Ne In The Afternoon. Seas 2 To 3 Ft, Building To 3 To 4 Ft In The Afternoon. Wave Detail: Se 3 Ft At 9 Seconds, Becoming Se 3 Ft At 9 Seconds And E 2 Ft At 3 Seconds. |
| Sun Night...E Winds 10 To 15 Kt. Seas 3 To 4 Ft. Wave Detail: Se 3 Ft At 8 Seconds And E 2 Ft At 5 Seconds. |
| Mon...E Winds 10 To 15 Kt. Seas 3 To 4 Ft. Wave Detail: E 3 Ft At 8 Seconds. |
| Mon Night...E Winds 5 To 10 Kt. Seas 3 To 4 Ft. Wave Detail: E 3 Ft At 8 Seconds. |
| Tue...Se Winds 5 To 10 Kt. Seas 2 To 3 Ft. |
| Tue Night...S Winds 5 To 10 Kt. Seas 2 To 3 Ft. |
| Wed...S Winds 10 Kt. Seas 2 To 3 Ft. |
| Wed Night...S Winds 10 Kt. Seas 2 To 3 Ft. Winds And Seas Higher In And Near Tstms. |
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Area Forecast Discussion National Weather Service Charleston SC 1000am EDT Sat April 26 2025 Synopsis A cold front will move through tonight, followed by high pressure through much of next week. Near Term - Through Tonight This morning, radar trends indicate that ongoing showers across the Midlands will track north of the forecast area. The updated forecast will indicate lower Probability of Precipitation through early this afternoon. The observed 12Z KCHS sounding indicated a strong inversion centered at 780 mb with a convective temperature near 80 degrees. Recent runs of the HRRR (High-Resolution Rapid Refresh) indicates that isolated and scattered showers and thunderstorms may develop a bit later this afternoon and evening. The later timing seems on track given the strong inversion observed on the KCHS sounding. Through This Evening: A cold front will approach from the northwest, but will remain too distant to have a direct impact. Near term models show dewpoints pooling into the mid-upper 60s across much of southern South Carolina and down along the Georgia coast (behind the sea breeze) mid-late afternoon which will yield modest mixed- layered instability for late April. Dewpoints are forecast to mix out into the mid-upper 50s across Southeast Georgia which will curtail the level of available instability even as highs there warm into the upper 80s/lower 90s. The best chances for scattered showers/thunderstorms will occur across the Charleston Tri-County where the most favorable juxtaposition of moisture, instability and localized forcing along lingering convective outflows and the sea breeze will occur. Isolated showers/thunderstorms could develop near/behind the sea breeze along the far southern South Carolina coast into parts of coastal Georgia late this afternoon/early evening before convection wanes with the onset of diurnal cooling. probability of precipitation will range from 40-50% across the Charleston Tri-County to 20-30% for areas north of I-16 into far southern South Carolina with 20% along coastal Georgia. The thermodynamic environment across far interior Southeast Georgia looks too poor to support anything meaningful with probability of precipitation holding 10% or less. Modified soundings at both KCHS and KMKS support MLCAPE >2000 J/kg with WBZ heigheights as low as 11 kft and DCAPE just over 800 J/kg. These conditions could support an isolated strong to severe tstm with damaging winds and large hail. 0-6km bulk shear looks to peak 20-25 kt, so storms should remain pulse in nature, although some brief organization could occur where mesoscale boundary collisions occur. The risk for an isolated severe thunderstorm looks highest roughly along/northeast of Smoaks-Walterboro- Jacksonboro-Edisto Island line between 2pm and 6 PM. This includes the entire Charleston Metro Area. Overnight: Warm and moist conditions for late April will prevail as a cold front approaches from the north. The front is targeted to be near the I-16 corridor by daybreak Sunday. A few showers could accompany the front, mainly across eastern portions of Berkeley County into upper Charleston County where low-level moisture will be the highest. Lows will range from the lower-mid 60s inland to around 70 at the beaches. Short Term - Sunday Through Tuesday The front will remain stalled across southeast GA Sunday into Monday. On Sunday, southern SC will remain in the cool sector with highs around 80. Meanwhile, southeast GA could reach the upper 80s. Quite a bit more moisture will also reside near the front in southeast GA. Scattered afternoon convection is possible where the sea breeze intersects the frontal zone. On Monday we could again see a few showers or thunderstorms across our southwestern zones, though with the surface high shifting south, the best forcing will be pushed just outside the forecast area. A deep layered ridge will build over the area on Tuesday, yielding dry weather and temps pushing into the mid 80s everywhere except the sea breeze cooled beaches. Long Term - Tuesday Night Through Friday Deep ridging will produce above normal temperatures mid to late week. Dry weather expected Tuesday night through Wednesday night. Scattered diurnal convection will be possible beginning Thursday but particularly Friday as a cold front approaches. Marine Today: The waters will remain along the western side of the Atlantic high pressure centered well offshore. The pattern favors another robust sea breeze along the land/sea interface and Charleston Harbor this afternoon. Winds could be as high as 15 kt with gusts to 20 kt. A few gusts could get close to 25 kt, but likely not frequent enough to warrant a Small Craft Advisory. Otherwise, winds will average 10-15 kt with seas 2-4 ft across the remainder of the coastal waters. A few strong thunderstorms could move off the Charleston County coast late this afternoon and evening. Gusts in excess of 35 kt and hail could occur. Special Marine Warnings could be needed. Tonight: Southerly winds will persist, but will turn northerly across the northern waters late as a cold front drops south. Winds will remain below 15 kt with seas 2-4 ft. Sunday through Thursday: Sunday will feature NE flow over the waters as surface high pressure builds in from the northwest. A few 20 kt wind gusts will be possible in Charleston Harbor and the Charleston County nearshore waters, particularly in the afternoon with a sea breeze enhancement. For the remainder of the period, winds/seas will remain well below advisory criteria. Rip Currents A 2 ft, 9 sec swell will persist today. Breezy conditions along the sea breeze coupled with peaking astronomical influences will support a high risk for all beaches today. Rip currents were reported Saturday afternoon at Tybee Island. A moderate risk is in place for the Georgia beaches for Sunday. Tides / Coastal Flooding Minor to moderate coastal flooding is possible with the evening high tides due to the elevated tides from the approaching new moon and perigee. For the Charleston Harbor gage, the astronomical tides rise above 6.5 ft MLLW with the evening tides through Wednesday. With the approaching surface high pressure Sunday and Monday, northeasterly to easterly surface flow may cause the waters to rise into minor flood stage (7.0 ft MLLW) with the evening high tides with a possibility for moderate flooding (7.5 ft MLLW) for the Sunday evening high tide. For the Fort Pulaski gage, minor flooding (9.5 ft MLLW) is possible with the Sunday evening high tide. Coastal Flood Advisories will be needed for portions of the coast. NOAA Charleston SC Office: Watches - Warnings - Advisories GA...High Risk for Rip Currents until 8pm EDT this evening for GAZ117- 119-139-141. SC...High Risk for Rip Currents until 8pm EDT this evening for SCZ048>051. Marine None. |
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