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Marine Weather and Tide Forecast for Yemassee, SC

June 25, 2024 3:21 PM EDT (19:21 UTC) Change Location
Sunrise 6:16 AM   Sunset 8:34 PM
Moonrise 10:53 PM   Moonset 8:52 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 255 Pm Edt Tue Jun 25 2024

Tonight - S winds 5 to 10 kt. Seas 2 to 3 ft. Wave detail: se 2 ft at 6 seconds.

Wed - S winds 5 to 10 kt. Seas 2 to 3 ft. Wave detail: se 2 ft at 7 seconds. A slight chance of showers and tstms.

Wed night - S winds 10 to 15 kt. Seas 2 to 3 ft. Wave detail: S 3 ft at 4 seconds and se 2 ft at 9 seconds. A slight chance of showers and tstms.

Thu - SW winds 10 to 15 kt. Seas 3 ft. Wave detail: sw 2 ft at 4 seconds and se 2 ft at 9 seconds. A slight chance of showers and tstms in the morning, then a chance of showers and tstms in the afternoon.

Thu night - SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave detail: S 2 ft at 4 seconds and se 2 ft at 9 seconds. A chance of showers and tstms.

Fri - SW winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave detail: S 2 ft at 5 seconds and se 2 ft at 9 seconds. A chance of showers and tstms.

Fri night - S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.

Sat - S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.

Sat night - S winds 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms.

Sun - S winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms.

Sun night - S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms.
winds and seas higher in and near tstms.

AMZ300 255 Pm Edt Tue Jun 25 2024

Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - High pressure will remain over the western atlantic while a weak cold front approaches the area. This front will likely linger near the area through mid-week, followed by another front towards the end of the week.


7 Day Forecast for Marine Location Near Yemassee, SC
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Area Discussion for - Charleston, SC
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675 FXUS62 KCHS 251600 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1200 PM EDT Tue Jun 25 2024

SYNOPSIS
High pressure will remain over the western Atlantic while a weak cold front approaches the area. This front will likely linger near the area through mid-week, followed by another front towards the end of the week.

NEAR TERM /THROUGH TONIGHT/
The heat index has already reached 110 at the Beaufort MCAS, 108 at the Summerville Airport, 107 at the Savannah NWR RAWS just north of Savannah, 106 at the Charleston Intl Airport, 106 at the Charleston Executive Airport, 104 in Downtown Charleston, 104 at Hunter AAF and 102 at the Savannah Intl Airport.

No major changes were made for the noon update. The forecast is mostly on track. GOES-E visible satellite images show a well defined outflow boundary poised to push onshore along the upper Charleston County coast soon. This boundary originated from an area of convection off the northeast South Carolina coast. It is unclear how this feature will impact both the temperature and convective pattern later this afternoon, so this will be closely watched. The surface trough/wind shift has nudged inland ever so slightly per 1530z observations.

Today: 25/1530z surface analysis placed a weak southwest- northeast oriented surface trough/wind shift extending from Glennville, GA through Hampton, SC and into the Santee Cooper Lakes region. The trough will move little today and may become a focus for isolated to perhaps scattered showers/tstms this afternoon. The best focus looks to occur the Colleton- Dorchester-Berkeley County corridor where the highest 850 theta-e values are progged. Pops 20-30% look on track. Similar to yesterday, an isolated strong-severe tstm can not be ruled out with damaging winds and cloud-to- ground lightning being the primary convective hazards.

Of more concern is the heat. The latest low-level thickness progs suggest highs will once again push the mid-upper 90s away from the coast with a greater signal for highs reaching the century mark across interior Southeast Georgia, possibly reaching into the Allendale and Hampton areas of South Carolina.
25/06z HRRR neighborhood probs show about a 60% chance for reaching highs 100-102 in these areas, which matches both the H3R and RAP hourly temperature progs. Highs were nudged up in this region given this trend. Dewpoints will be key to how high heat indices will reach. The deeper mixing across the interior will be fighting the stronger onshore push of higher low-level moisture noted just off the beaches this morning (dewpoints already near 80 in spots along the lower South Carolina coast per 25/13z observations). Models are struggling on exactly which process will win out. Given dewpoints are already running higher than what the latest high-res models are depicting, suspect they may be underplaying the dewpoints across the coastal corridor this afternoon. Adjusted near term dewpoints taking trends noted from yesterday support another corridor of heat indices reaching 105-112 across the coastal counties, possibly extending into southern portions of Berkeley and Dorchester Counties. The Heat Advisory looks well placed, but was expanded to include Inland Berkeley and Dorchester, mainly to take into account the southern, more urban areas of those counties where heat indices reaching 108 is the most likely. The advisory is valid Noon to 6 PM EDT. Some further adjustments to the advisory may be needed with the noon update, but the advisory area shows where the highest confidence in reaching heat indices of 108 to less than 113 is the greatest.
Similar to yesterday, a few instances of heat indices reaching 113+ could occur, but these do not look widespread enough to justify an upgrade to an Excessive Heat Warning at this time.

Tonight: Any convection will diminish through the early to mid evening timeframe with quiet/mild conditions thereafter. Lows dip into the middle to upper 70s overnight...warmer along the coast.

SHORT TERM /WEDNESDAY THROUGH FRIDAY/
Wednesday: The mid-levels will consist of troughing gradually developing over the East Coast. At the surface, a weak stationary front should be located to our west and north at daybreak. It`s forecasted to dissipate into the afternoon. Though, surface troughing should remain in place across our region. A cold front should approach from the northwest overnight. Though, it`s not expected to reach our area during that time frame. Higher PWATs should gradually creep into our area as time progresses. It`s possible they could exceed 2" closer to the coast, which is above normal for this time of year. The heat will be the main concern due to 850 mb temperatures, low-level thickness values, and compression near the front. Highs are expected to reach the mid to upper 90s across most of our area, except cooler at the beaches. Dew points well into the 70s near the coast will cause heat indices to rise to ~108 degrees, which is borderline Heat Advisory criteria. Though, any could be brief due to afternoon convection lowering the temperatures. Both the synoptic models and the long-range CAMs have afternoon convection developing along the inland moving sea breeze.
Scattered coverage seems reasonable, especially further south.
MLCAPEs should approach 1,500-2,000 J/kg across portions of our area with some shear. With DCAPEs exceeding 1,000 J/kg, a few marginally severe storms with damaging winds are possible just about anywhere.
Additionally, there will be the potential for locally heavy rainfall underneath the thunderstorms due to fairly weak steering flow and the potential for training. Convection should quickly decrease during the evening, with the overnight being mainly dry. Lows will be in the 70s.

Thursday: Mid-level troughing initially over the East Coast will gradually shift offshore. Additionally, a shortwave is expected to move over our region during the late afternoon or evening. A cold front located just to our northwest at daybreak should very slowly move across our area during the day and into the night. There will be a plume of deep moisture ahead of the front. PWATs could exceed 2", which is above normal for this time of year. Similar to Wednesday, high temperatures are expected to reach well into the 90s for most areas, perhaps reaching 1-2 degrees higher. Dew points well into the 70s near the coast will cause heat indices to rise to ~110 degrees. So Heat Advisories may be needed for the coastal counties.
Forcing from the front, the afternoon sea breeze, and the shortwave will generate convection in the afternoon. All of the models point towards scattered to numerous coverage, which is why we have high end chance POPs. It`s a bit uncertain how much instability and shear will be in place. But given the setup a few marginally severe storms with damaging winds are possible just about anywhere. Additionally, there will be the potential for locally heavy rainfall underneath the thunderstorms due to fairly weak steering flow and the potential for training. Convection should gradually decrease during the evening. But remnant convection could persist everywhere overnight.
Lows will be in the 70s.

Friday: The mid-levels should consist of zonal flow over our region.
At the surface, a stationary front should be over our area in the morning. It`s expected to dissipate into the afternoon. Deep moisture will persist across the region. Forcing from the front and the afternoon sea breeze are expected to generate convection.
Though, the coverage will depend on how much instability is in place and the amount of shear. Similar to the previous two days, high temperatures are expected to reach well into the 90s for most areas.
Dew points well into the 70s near the coast will cause heat indices to rise as high as 108 degrees along the coast, which could prompt Heat Advisories.

LONG TERM /FRIDAY NIGHT THROUGH MONDAY/
Surface troughing or weak fronts will be impacting the Southeast U.S. while High pressure is near Bermuda. This summertime pattern will yield diurnal convection. The highest POPs are each afternoon and evening, then trending lower overnight. High temperatures will be well into the 90s each day. Additionally, heat indices could approach 108 degrees along the coast each day.

AVIATION /16Z TUESDAY THROUGH SATURDAY/
25/18z TAF Discussion: KCHS/KJZI/KSAV: Best convective parameters look to occur near KCHS this afternoon in the vicinity of a weak surface trough.
VCTS was highlighted there through 21z. Otherwise, the best tstm impacts look to remain west of KSAV and KJZI. VFR will prevail for the remainder of the 18z TAF period. Some last minute adjustments may be needed based on radar trends at issuance time.

Extended Aviation Outlook: Mostly VFR. However, convection could bring brief flight restrictions, mainly each afternoon and evening.

MARINE
Today: South to southeast winds 5-10 kt will prevail with seas 2-3 ft. Winds will be a tad higher in the Charleston Harbor.

Wednesday through Saturday: A typical summertime pattern is expected with High pressure in the western Atlantic and occasional surface troughing or fronts over the Southeast. Each day, expect gradually backing winds. They`ll be strongest along the land/sea interface and the Charleston Harbor with the formation of the afternoon sea breeze. Each night, winds will gradually veer, possibly surging closer to the coast. Seas will be 2-3 ft.

Rip Currents: Wednesday a 1-2 ft SE swell around 8 seconds will be impacting the beaches. Though, there are hints that an additional SE swell of 1 ft around 10 seconds could also impact the beaches during the afternoon. Per internal calculations, this would bump up the rip current risk to Moderate at all of our beaches. Given the uncertainty, we opted to maintain a Low risk for now. But this will need to be reevaluated during the day.

CHS WATCHES/WARNINGS/ADVISORIES
GA...Heat Advisory until 6 PM EDT this evening for GAZ117>119- 139>141.
SC...Heat Advisory until 6 PM EDT this evening for SCZ044-045- 047>052.
MARINE...None.




Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
ACXS1 - ACE Basin Reserve, SC 17 mi96 minS 1 89°F 29.9279°F
41033 33 mi73 minSSW 14G16 82°F 84°F29.9679°F
41067 33 mi126 min 83°F3 ft
CHTS1 44 mi51 minS 13G14 85°F 85°F29.95
FPKG1 - 8670870 - Fort Pulaski, GA 45 mi51 minSSW 8G9.9 86°F 83°F29.94


Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KNBC BEAUFORT MCAS /MERRITT FIELD/,SC 14 sm25 minSSE 087 smA Few Clouds93°F79°F63%29.91
KRBW LOWCOUNTRY RGNL,SC 17 sm6 minSSE 0610 smClear97°F70°F42%29.90
KARW BEAUFORT COUNTY,SC 20 sm6 minSSE 0510 smClear90°F59°F36%29.91
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Wind History graph: NBC
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Tide / Current for Bluff Plantation, Combahee River, South Carolina
   
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Bluff Plantation
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Tue -- 02:59 AM EDT     3.55 feet High Tide
Tue -- 06:16 AM EDT     Sunrise
Tue -- 09:21 AM EDT     -0.10 feet Low Tide
Tue -- 09:52 AM EDT     Moonset
Tue -- 03:25 PM EDT     3.01 feet High Tide
Tue -- 08:34 PM EDT     Sunset
Tue -- 09:24 PM EDT     0.00 feet Low Tide
Tue -- 11:52 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Bluff Plantation, Combahee River, South Carolina, Tide feet
12
am
2.2
1
am
2.9
2
am
3.4
3
am
3.6
4
am
3.4
5
am
2.9
6
am
2.1
7
am
1.2
8
am
0.4
9
am
-0.1
10
am
0
11
am
0.5
12
pm
1.3
1
pm
2.1
2
pm
2.7
3
pm
3
4
pm
2.9
5
pm
2.6
6
pm
2
7
pm
1.2
8
pm
0.5
9
pm
0
10
pm
0.1
11
pm
0.6


Tide / Current for Sheldon, Huspa Creek, Whale Branch, South Carolina
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Sheldon
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Tue -- 01:05 AM EDT     9.31 feet High Tide
Tue -- 06:17 AM EDT     Sunrise
Tue -- 07:22 AM EDT     -0.21 feet Low Tide
Tue -- 09:52 AM EDT     Moonset
Tue -- 01:31 PM EDT     7.88 feet High Tide
Tue -- 07:25 PM EDT     0.00 feet Low Tide
Tue -- 08:34 PM EDT     Sunset
Tue -- 11:52 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Sheldon, Huspa Creek, Whale Branch, South Carolina, Tide feet
12
am
8.8
1
am
9.3
2
am
8.9
3
am
7.6
4
am
5.7
5
am
3.4
6
am
1.2
7
am
-0.1
8
am
0.1
9
am
1.4
10
am
3.4
11
am
5.4
12
pm
7
1
pm
7.8
2
pm
7.8
3
pm
6.9
4
pm
5.3
5
pm
3.3
6
pm
1.3
7
pm
0.1
8
pm
0.2
9
pm
1.5
10
pm
3.6
11
pm
5.8


Weather Map
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Charleston, SC,




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