Awendaw, SC Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Awendaw, SC


December 9, 2023 3:35 AM EST (08:35 UTC)
Sunrise 7:08AM   Sunset 5:14PM   Moonrise  3:44AM   Moonset 2:46PM 

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. Privacy and Cookie policy

Marine Forecasts
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AMZ330 Charleston Harbor- 321 Am Est Sat Dec 9 2023
Today..SE winds 5 kt, increasing to 5 to 10 kt this afternoon.
Tonight..S winds 5 to 10 kt. A chance of showers after midnight.
Sun..S winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Waves 1 to 2 ft. A slight chance of tstms. Showers.
Sun night..SW winds 20 to 25 kt, becoming W after midnight. Waves 2 to 3 ft. Showers with a slight chance of tstms in the evening, then a chance of showers after midnight.
Mon..NW winds 10 to 15 kt.
Mon night..N winds 10 kt.
Tue..NE winds 10 to 15 kt.
Tue night..NE winds 10 to 15 kt.
Wed..NE winds 10 to 15 kt.
Wed night..NE winds 15 to 20 kt. Waves 1 to 2 ft.
winds and waves higher in and near tstms.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 59 degrees.

AMZ300 321 Am Est Sat Dec 9 2023
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will remain off the coast through today. A strong cold front will cross the area Sunday evening, followed by cool and dry high pressure through late week.


7 Day Forecast for Marine Location Near Awendaw, SC
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Area Discussion for - Charleston, SC
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FXUS62 KCHS 090557 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1257 AM EST Sat Dec 9 2023

SYNOPSIS
High pressure will prevail through Saturday. A strong cold front will cross the area on Sunday, followed by high pressure next week.

NEAR TERM /UNTIL 6 AM THIS MORNING/
After midnight, regional radar indicated a few areas of light returns over the coastal waters. The returns were drifting to the NE, generally parallel to the coast. The forecast will continue to feature isolated to scattered PoPs. Guidance remains in good agreement with the timing and placement of fog along the GA coast around dawn Saturday. The area of patchy fog was adjusted to cover a bit more of the coastal GA counties.

Tonight: Surface high pressure is several hundred miles offshore, and the return flow around this feature has allowed for dew points to rise some 15-20F degrees since a similar time last night. This moisture and the onshore flow looks to produce some late night/early morning fog as depicted by just about all guidance. Of course this is dependent upon the current cloud cover diminishing enough. While confidence is not very high, there is enough evidence that at least patchy fog will occur after about 4 AM Saturday. The most likely corridor is the coastal counties from southern Charleston or coastal Colleton south to McIntosh. It's possible that the coverage could be greater than we now have, and we'll continue to watch trends.

A mid level impulse and an upper jet streak that has been producing considerable mid and high level clouds will continue to pull away overnight. But there remains enough moisture around 5-6K feet, that skies will generally be mostly cloudy, with some clearing late.

The low levels will continue to warm through the night. 850 mb temps will rise about 1C from 00Z to 12Z, and the 1000-850 mb thickness expands around 5-8 meters during that same time. As a result, min temps will be as much as 10-20F degrees warmer than Friday morning.

A very subtle inverted trough out near the western wall of the Gulf Stream might produce a few showers closer to daybreak that brush the coast of Charleston County. But PoPs are held under 15%.

SHORT TERM /6 AM THIS MORNING THROUGH MONDAY/
Saturday: Surface high pressure will shift offshore of the Southeast U.S. through Saturday night as the main upper-level ridge axis propagates to the east. A warm, southerly flow on the backside of the high will support a slowly increase in moisture with PWATs climbing >1.25". A few showers associated with a weak coastal trough just offshore could skirt parts of the lower/middle South Carolina coast through the day as pockets of channeled vorticity embedded in the southwest flow aloft traverse the area, but no major impacts are expected. Rain chances will start to ramp up early Sunday morning as a broad corridor of warm air advection ahead of an approaching cold front spreads east into the Carolinas and Georgia. While the better rain chances will hold off until Sunday, some degree of scattered shower activity will likely impact parts of the area prior to daybreak with signals that the highest coverage could be centered along the South Carolina coast. Pops were adjusted slightly to reflect this thinking. Highs will warm into the mid- upper 70s Saturday afternoon with lows Sunday morning only dropping into the lower 60s for most areas.

Sunday: Sunday has the potential to be quite active with a number of potential impacts. Guidance is consistent in showing a strong upper trough digging across the lower Mississippi Valley and swinging east across the Southeast U.S. Sunday with a powerful 150 kt meridonally oriented polar jet aligned just ahead of it. Strong DCVA ahead of the trough coupled with a region of strong warm air advection aided by a 45-55 kt low- level jet will support a broad corridor of intense, deep-layered forcing across much of the Southeast U.S., crossing the local area Sunday afternoon into Sunday evening. While this feature will support a region of widespread rainfall within a well- defined pre-frontal warm sector, it remains unclear if one solid area of rain will spread west-east across the region or if a series of convective bands will prevail. Guidance is essentially mixed on this potential. Either way, it does appear there is a high probability for measurable rainfall impacting the area as moisture steadily increases (PWATs rising >1.50" by Sunday evening just ahead of the front). High-end categorical pops were maintained given these trends. Rain will gradually end from west-east Sunday night as the front clears the coast although some rain will linger for a few hours after FROPA given the front's expected anafrontal structure. Highs will warm into the lower-mid 70s during the day with lows dropping into mid 30s across far interior Southeast Georgia to the mid-upper 40s at the coast Monday morning within a strong post- frontal cold air advection regime.

Widespread cloud cover and rain will tend to temper warm sector instability (average MLCAPE <500 J/kg and Lifted Indices of -1 to -3C). The degree of forcing still looks sufficient for a few tstms, some of which could be strong given the degree of forcing and 0-6km bulk shear noted. This setup is typical of a high shear/low CAPE (HSLC) scenario. While there is a non-zero risk for a localized damaging wind report or two, the overall risk for severe weather looks fairly low at this time. The risk may increase a bit if more instability is realized, so this will be watched carefully.

Breezy to windy conditions will be possible Sunday afternoon into Sunday night as a pre-frontal low-level jet moves over the area and is quickly followed by a strong post-frontal cold air advection. 925 hPa winds are forecast to increase to as high as 45-50 kt by late Sunday afternoon/early evening as the cold front approaches. Some of these winds may be realized to the surface, especially in gusts as temperatures rise through the afternoon. BUFKIT mixed wind profiles show as much as 40 kt of wind at the top of the mixed-layer. Expect gusts 30-35 mph to be rather frequent with a few gusts near 40 mph, especially over the coastal counties where the warmest temperatures will be realized prior to FROPA. Winds could be higher over the elevated bridges across the Charleston and Savannah Metro Areas a well as the bridges heading out to the various barrier islands. These winds could pose a hazard to high-profile vehicles. A Lake Wind Advisory will likely be needed for Lake Moultrie, although winds speeds may be subdued somewhat over the open lake waters by the poor mixing profiles with water temperatures in the upper 50s. There is a chance that a Wind Advisory could be needed for some areas for winds 20-30 mph with gusts approaching 40 mph, especially over the coastal counties.

LONG TERM /MONDAY NIGHT THROUGH FRIDAY/
Cool and dry high pressure will prevail for next week.
Temperatures will gradually climb through the week as the airmass slowly modifies.

AVIATION /06Z SATURDAY THROUGH WEDNESDAY/
KCHS/KJZI/KSAV: VFR conditions expected at KCHS and KJZI through 6Z Sun. Dewpoints at KSAV are forecast to remain or slightly rise around 60 degrees this morning. High resolution guidance indicates that LIFR stratus and fog may develop along the GA coast around daybreak today. The KSAV will feature a TEMPO group from 11-14Z for BKN003 and 6SM due to fog. Otherwise, TAFs will feature south winds between 5-10 kts and VFR ceilings.

Extended Aviation Outlook: Impacts from winds as well as vsby and cig restrictions are likely Sunday into Sunday night as a cold front pushes through. Marginal low-level wind shear may also occur during the late afternoon/early evening just ahead of the cold front's wind shift. Low risk for tstms as well. VFR, thereafter.

MARINE
Tonight: High pressure centered 500-600 nm east of the local waters early on will become absorbed by stronger high pressure to the north overnight. This will produce SE and S winds no more than about 5 or 10 kt, with seas just 1 or 2 ft, with some 3 footers on the outermost Georgia waters. There could be some fog developing near the coast late into Saturday morning, with the higher probabilities from the Edisto River to the Altamaha River. This includes the Savannah River and potentially the Port of Savannah.

Saturday through Wednesday: The biggest marine impacts will occur Sunday into Monday morning as a cold front approaches then pushes offshore. Strong low-level jetting will help increase winds and build seas ahead of the front Sunday with winds reaching 15-20 kt with gusts to 25 kt across the nearshore legs and Charleston Harbor with winds 20-25 kt with gusts to 30 kt over the Georgia offshore zone and the outer portions of the South Santee-Edisto Beach nearshore zone. The a risk for gales will occur just ahead and immediately behind the front Sunday evening as the most intense portion of the pre-frontal low-level jet pushes through followed by strong post-frontal cold air advection. Gales, at least in frequent gusts, will be most likely occur in the cold air advection regime due to more favorable mixing profiles. Nearshore winds will peak 25- 30 kt with gusts to 35 kt with 30 kt with gusts to 40 kt beyond 20 NM.
Seas will peak 4-7 ft nearshore legs with 7-9 ft beyond 20 NM.
A mixture of Small Craft Advisories and Gale Watches will be needed in later forecast cycles. Conditions will improve Monday as cold air advection wanes and high pressure builds in. Winds and seas will begin to build again Wednesday as the pressure gradient tightens over the waters. Another round of Small Craft Advisories may be needed.

CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...None.
MARINE...None.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
41029 - Capers Nearshore (CAP 2) 10 mi87 min S 3.9G5.8 64°F 30.1760°F
CHTS1 17 mi77 min 58°F 59°F30.20
NIWS1 - North Inlet-Winyah Bay Reserve, SC 38 mi110 min 0 54°F 30.2152°F
41004 - EDISTO - 41 NM Southeast of Charleston, SC 43 mi25 min S 14G18 72°F 75°F30.2062°F
ACXS1 - ACE Basin Reserve, SC 49 mi110 min 0 53°F 30.2452°F

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Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KLRO MT PLEASANT RGNLFAISON FIELD,SC 6 sm20 mincalm7 smA Few Clouds50°F50°F100%30.19
KCHS CHARLESTON AFB/INTL,SC 19 sm39 mincalm10 smA Few Clouds52°F48°F87%30.19
KJZI CHARLESTON EXECUTIVE,SC 24 sm20 mincalm10 smClear54°F54°F100%30.19

Wind History from LRO
(wind in knots)


Tide / Current for Moores Landing, ICWW, Sewee Bay, South Carolina
   
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Moores Landing
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Sat -- 03:43 AM EST     Moonrise
Sat -- 05:04 AM EST     5.13 feet High Tide
Sat -- 07:09 AM EST     Sunrise
Sat -- 11:19 AM EST     0.77 feet Low Tide
Sat -- 02:46 PM EST     Moonset
Sat -- 05:10 PM EST     4.54 feet High Tide
Sat -- 05:12 PM EST     Sunset
Sat -- 11:24 PM EST     0.41 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Moores Landing, ICWW, Sewee Bay, South Carolina, Tide feet
12
am
1.2
1
am
2.1
2
am
3.2
3
am
4.2
4
am
4.9
5
am
5.1
6
am
4.9
7
am
4.2
8
am
3.3
9
am
2.2
10
am
1.3
11
am
0.8
12
pm
0.9
1
pm
1.6
2
pm
2.6
3
pm
3.6
4
pm
4.2
5
pm
4.5
6
pm
4.4
7
pm
3.7
8
pm
2.8
9
pm
1.8
10
pm
1
11
pm
0.5



Tide / Current for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
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Sat -- 01:39 AM EST     1.41 knots Max Flood
Sat -- 03:44 AM EST     Moonrise
Sat -- 05:27 AM EST     -0.00 knots Slack
Sat -- 07:10 AM EST     Sunrise
Sat -- 08:45 AM EST     -2.05 knots Max Ebb
Sat -- 11:49 AM EST     0.00 knots Slack
Sat -- 01:57 PM EST     1.35 knots Max Flood
Sat -- 02:47 PM EST     Moonset
Sat -- 05:13 PM EST     Sunset
Sat -- 05:16 PM EST     -0.00 knots Slack
Sat -- 08:45 PM EST     -1.85 knots Max Ebb
Sat -- 11:52 PM EST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Charleston Harbor Entrance, South Carolina Current, knots
12
am
0.7
1
am
1.3
2
am
1.4
3
am
1.2
4
am
0.9
5
am
0.4
6
am
-0.5
7
am
-1.3
8
am
-1.9
9
am
-2
10
am
-1.6
11
am
-0.8
12
pm
0.2
1
pm
1
2
pm
1.3
3
pm
1.1
4
pm
0.7
5
pm
0.2
6
pm
-0.6
7
pm
-1.3
8
pm
-1.7
9
pm
-1.8
10
pm
-1.5
11
pm
-0.7




Weather Map
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Charleston, SC,



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