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AMZ354 Waters From Savannah Ga To Altamaha Sound Ga Out 20 Nm, Including Grays Reef National Marine Sanctuary- 730 Am Edt Sat Sep 23 2023
Today..NW winds 15 to 20 kt, diminishing to 10 to 15 kt with gusts to 20 kt late this morning. Seas 3 to 4 ft, subsiding to 2 to 3 ft this afternoon.
Tonight..SW winds 5 to 10 kt. Seas 2 ft.
Sun..SW winds 10 kt. Seas 2 ft.
Sun night..S winds 10 to 15 kt. Seas 2 to 3 ft.
Mon..W winds 5 to 10 kt, becoming S in the afternoon. Seas 2 ft.
Mon night..S winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers after midnight.
Tue..NE winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.
Tue night..E winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.
Wed..NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms.
Wed night..NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers.
winds and seas higher in and near tstms.

AMZ300 730 Am Edt Sat Sep 23 2023
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will build across the region today and remain in place through early next week. An unsettled weather pattern could impact the area by the middle of next week.

FXUS62 KCHS 231157 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 757 AM EDT Sat Sep 23 2023

SYNOPSIS
High pressure will build across the region today and remain in place through early next week. An unsettled weather pattern could impact the area by the middle of next week.

NEAR TERM /THROUGH TONIGHT/
KCLX shows diminishing returns as light rains get scoured out by drier northwesterly flow. POPs have been lowered to account for another hour of light rain across parts of Berkeley and Charleston Counties. The biggest change for the late morning update was to extend the Lake Wind Advisory until 11am. Latest observations show gusts at Lake Moultrie at 26 kt.
Additionally, guidance shows a few more hours of gusts near or above 25 kt.

Today: The forecast today is largely tied to Ophelia and residual effects on the southwest periphery of the circulation.
The day will begin with some lingering light rain or showers across portions of the Charleston Tri-County region. However, this rain should get scoured out by mid morning thanks to drier air and the fact that the center of circulation will continue lifting northward and away from the region. What will likely stick around the longest is the wrap around cloud cover. Most of southeast South Carolina will likely be mostly cloudy or overcast through the day. Winds will remain out of the northwest through the day, with some lingering breezy conditions into the early afternoon mainly across southeast South Carolina. The combination of the cool northwest wind and lingering cloud cover will have implications for high temperatures. For southeast South Carolina, cooler highs can be expected as you go further to the east and closer to the Santee River. Colleton County and the Tri-County will likely top out in the upper 70s with some areas in eastern Berkeley and Charleston counties struggling to get out of the mid 70s. Along the Savannah River temperatures should get into the low 80s, with some mid 80s possible as you get closer to the Altamaha River.

Lake Winds: Gusty northwest winds will continue this morning across Lake Moultrie with frequent to occasional gusts into the 25-26 knot range. Gusts should diminish around 11 am and the current Lake Wind Advisory has been extended through that time.

Tonight: The forecast is very quiet. Skies will clear out from southwest to northeast from the late evening through the early morning hours. Low temperatures will range from the upper 50s across the far interior to the mid to upper 60s at the coast.

SHORT TERM /SUNDAY THROUGH TUESDAY/
Sunday and Monday: As the remnants of Ophelia move towards the Delmarva Peninsula, weak high pressure will build into our region Sunday and continue through Monday. A weak upper ridge axis will briefly slide across the area. Expect dry conditions with mostly sunny skies Sunday and Monday. High temperatures are expected to generally range in the mid to upper 80s both days.
Lows Sunday night will generally range in the 60s away from the coast with lower 70s along the beaches. Monday night will be slightly more mild with lows in the mid to upper 60s away from the beaches.

Tuesday: Surface high pressure over eastern Canada will wedge southward into the Central Appalachians, meanwhile a shortwave lifting out from across the Mississippi Valley will advect deep moisture into the Southeast. Forcing ahead of the disturbance will allow showers to develop, perhaps even a thunderstorm.
Because instability is fairly limited, we only mention slight chance of thunder in the forecast. Showers will likely initially develop across southeast Georgia where the deeper moisture will pool. Drier air within the wedge will hold together through most of the day, but moisture will eventually give way in the evening which could allow convection to spread further north before stabilization occurs late. Highs will again reach the mid to upper 80s, perhaps a degree or two cooler than previous days due to increasing clouds.

LONG TERM /TUESDAY NIGHT THROUGH FRIDAY/
Conditions become somewhat unsettled through the end of the week as a highly positively tilted longwave trough over the Ohio Valley pivots across the East Coast. The inland wedge pattern will persist through much of the long term period, along with a broad area of low pressure offshore. The forecast will feature isolated to scattered showers and thunderstorms Wednesday through Friday, mainly for those areas closer to the coast and outside the influence of the inland wedge. Temperatures are expected to be slightly cooler than normal through the end of next week given thicker cloud cover and precipitation.

AVIATION /12Z SATURDAY THROUGH WEDNESDAY/
KCHS and KJZI: The 12z TAF period begins with MVFR conditions in the wake of Ophelia. MVFR ceilings will likely stay through much of the afternoon. VFR conditions will return by late afternoon and then prevail through the rest of the period as skies clear. Northwest winds will remain breezy, with gusts 15-20 kt through the afternoon before weakening later this evening.

KSAV: VFR conditions are expected to prevail through 12z Sunday.

Extended Aviation Outlook: VFR should prevail Sunday into Monday night. Brief flight restrictions could occur within showers/thunderstorms through the middle of the week.

MARINE
Today through tonight: Conditions continue to improve across the local waters as Ophelia gains latitude. The worst conditions continue in the Charleston County waters where gusts up to 30 kt are occurring. The Tropical Storm Warning has been cancelled and replaced with a Small Craft Advisory. Winds and seas have diminished sufficiently to drop the Small Craft Advisory in the Beaufort County nearshore waters. As winds and seas continue to weaken through the morning, we should be able to drop the two remaining Small Craft Advisories. Conditions continue to improve this evening and by late tonight winds will be 5-10 knots across all waters.

Sunday through Thursday: As weak high pressure builds in the wake of Tropical Cyclone Ophelia, marine conditions will steadily improve. By Sunday morning winds will shift out of the southwest with speeds around 10 kt. Additionally, seas will drop to 1-3 feet. Then winds will shift out of the northeast Tuesday as stronger high pressure wedges inland. Due to the tightening of the pressure gradient, wind speeds will increase to around 15 kt with higher gusts. Seas out to 20nm will build to 2-4 feet and 5-6 feet in the outer Georgia waters from 20-60nm. Small Craft Advisories could be needed for portions of the waters for 25 kt gusts and 6 ft seas starting Wednesday night.

Rip Currents: There will be enough lingering swell and gusty winds this morning to produce a Moderate Risk of rip currents at all beaches today.

CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...Lake Wind Advisory until 11 AM EDT this morning for SCZ045.
MARINE...Small Craft Advisory until 4 PM EDT this afternoon for AMZ350.
Small Craft Advisory until 2 PM EDT this afternoon for AMZ374.

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Isle of Hope
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Sat -- 12:18 AM EDT     Moonset
Sat -- 03:15 AM EDT     7.23 feet High Tide
Sat -- 07:12 AM EDT     Sunrise
Sat -- 09:05 AM EDT     1.26 feet Low Tide
Sat -- 03:33 PM EDT     Moonrise
Sat -- 03:58 PM EDT     8.48 feet High Tide
Sat -- 07:19 PM EDT     Sunset
Sat -- 10:16 PM EDT     1.69 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Isle of Hope, Skidaway River, Georgia, Tide feet

Savannah River Entrance
Click for Map
Sat -- 12:17 AM EDT     Moonset
Sat -- 12:30 AM EDT     1.27 knots Max Flood
Sat -- 03:51 AM EDT     -0.00 knots Slack
Sat -- 06:27 AM EDT     -1.36 knots Max Ebb
Sat -- 07:12 AM EDT     Sunrise
Sat -- 09:54 AM EDT     0.00 knots Slack
Sat -- 12:51 PM EDT     1.77 knots Max Flood
Sat -- 03:32 PM EDT     Moonrise
Sat -- 04:52 PM EDT     -0.00 knots Slack
Sat -- 07:18 PM EDT     Sunset
Sat -- 08:19 PM EDT     -1.66 knots Max Ebb
Sat -- 11:16 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Savannah River Entrance, Georgia Current, knots

Full Color Weather Map

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Charleston, SC,