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Marine Weather and Tides Laurel Bay, SC Version 3.4

NOTICE 1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17. 1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

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Sunrise 6:43AM

Sunset 6:25PM

Friday March 5, 2021 2:36 PM EST (19:36 UTC)

Moonrise 12:33AM

Moonset 11:04AM

Illumination 54%

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.

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7 Day Forecast for Marine Location Near Laurel Bay, SC

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Area Discussion for - Charleston, SC

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FXUS62 KCHS 051746 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1246 PM EST Fri Mar 5 2021

SYNOPSIS. High pressure will prevail into next week.

NEAR TERM /THROUGH TONIGHT/. Early afternoon update: Only minor adjustments made to the current which included updating temps/dewpoints with current observations. Also, increased max temps a degree or two, mainly closer to the coast.

Today: The day is on track to be sunny through early afternoon as high pressure prevails across the region. Then, as moisture associated with a short wave approaches from the west, cloud cover will increase from west to east. Even with increased moisture, no precip is expected as PWATs are less than 1/2".

Even with cold air advection this morning, temperatures are quickly rising into the upper 50s. Updated temps and dewpoints with current observations. Overall, temperatures should top out in the upper 50s to low 60s across SE SC and mid 60s across SE GA.

Tonight: The meso-high initially over the region becomes absorbed within the circulation of the parent high in the upper Midwest and southern Canada. At the same time, a short wave moving toward the lower Mississippi Valley generates weak cyclogenesis in the Gulf of Mexico. This short wave begins to phase with the larger trough covering the northeast quadrant of the country. The short does dampen some as it draws closer to the local district, but the approach of this feature and the sub-tropical jet overhead will produce an increase in mid and high level clouds, that will lower and thicken through the night. There is subtle isentropic ascent that occurs overnight, but given limited moisture below 700 mb, the risk for anything more than sprinkles (if that) is less than 15%. So this doesn't require any mention in the forecast.

Temperatures will be dictated by how fast clouds thicken up into an overcast deck. But do look to be similar to or a tad colder than early this morning for actual minimums, given that weak cold advection will occur with the 850 mb 0C isotherm to make into our South Carolina counties by 12Z.

SHORT TERM /SATURDAY THROUGH MONDAY/. Saturday: The mid-levels will consist of a long-wave trough over the East Coast. A short-wave will be over the Southern Plains in the morning. It will move over the Southeast overnight, as it starts to round the base of the trough. At the surface, a weak system in the Gulf of Mexico in the morning will pass to our south during the afternoon, then move offshore in the evening, and away overnight. Minimal impacts are expected from this system across our area. The reason is broad high pressure to our northwest will provide enough dry air to deflect the system away from us. Both synoptic models and the CAMS keep the measurable rainfall either to our south or over our GA coastal waters during the daylight hours. Since the models trended drier, our forecasted trended that way as well. The only POPs we have are a slight chance for McIntosh County during the day. The rest of our area will remain dry. The evening and overnight will be dry everywhere. The combination of northeast winds and cold 850 mb temperatures will cause high temperatures to be below normal. Most locations will be in the 50s with it struggling to reach the 60 degree mark across portions of GA. Overnight will be even colder. The combination of light northwest winds, cold air advection, and clearing skies will yield temperatures in the 30s for most of the area, and near 40 degrees at the beaches. If winds ease a bit and RH values creep higher, we could have quite a bit of frost across the area. For now, we introduced patchy frost. This will need to be adjusted with future forecasts.

Sunday and Monday: The mid-levels will consist of a long-wave trough over the East Coast Sunday morning. The trough will move offshore Sunday night, pushed away by ridging approaching from the west. Heights will rise over the Southeast on Monday. At the surface, an elongated area of high pressure will be to the west of the Appalachian Sunday morning. The high will slowly shift to the southeast, becoming located over the Southeast U.S. by late Monday. The high will dominate our weather both days, bringing dry conditions and sunny/clear skies. Despite all of the sun, temperatures will remain below normal. North to northwest winds and cold 850 mb temperatures will yield highs in the 50s for most of our area on Sunday. The cold temperatures will carry over into Sunday night, with lows bottoming out in the 30s for most locations, and near 40 degrees at the beaches. Once again, frost formation is a concern, so we have patchy frost in the forecast. Though, it's not out of the question some locations far inland could have freezing temperatures. High temperatures on Monday are expected to be a few degrees warmer than on Sunday, but still below normal for this time of year.

LONG TERM /MONDAY NIGHT THROUGH FRIDAY/. Models are in excellent agreement for the long term forecast. They keep high pressure off the coast, with it's periphery stretching into the Southeast U.S. Dry conditions with moderating temperatures are expected.

AVIATION /18Z FRIDAY THROUGH WEDNESDAY/. VFR.

Extended Aviation Outlook: A weak system passing to our southeast will bring a low probability of flight restrictions on Saturday. Otherwise, VFR will prevail.

MARINE. Today: A decent N-NE surge is occurring across the local waters this morning, as strong high pressure builds atop a diffuse backdoor cold front. Cold advection, a tightening of the gradient and steady isallobaric pressure rises will push winds close to Small Craft Advisory levels. However, any winds of 25 kt or greater will be too short-lived where we opted not to hoist the advisory with our latest forecasts. Winds will veer around 20-30 degrees this afternoon as they drop to around 12-18 kt by days end. Seas will build as large as 3-4 feet within 20 nm of the coast, and up to 4 to 5 feet further offshore.

Tonight: High pressure will be the dominant surface feature, while weak low pressure forms in the north-northwest Gulf of Mexico. Even though there is a gradual tightening of the gradient, NE winds will hold below 15 or 20 kt, while seas average 2-4 feet.

Saturday: A weak system will pass to our south during the day, then move offshore overnight. High pressure will then approach from the northwest overnight. The interaction between these two features along with cold air advection will cause winds to increase during the evening and overnight. It's borderline whether we'll need a Small Craft Advisory or not for the GA waters beyond 20 nm. If so, it would be late at night for wind gusts ~25 kt.

Sunday: The combination of pressure rises from broad High pressure building towards the region and cold air advection will be causing elevated winds and seas in the morning. As the day progresses, the combo will lessen, causing winds to ease. If there are any Small Craft Advisories up, they'll be taken down in the afternoon. Conditions will continue to improve into the evening and overnight.

Monday and Beyond: Broad high pressure will bring tranquil marine conditions. No marine headlines are expected.

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



NEAR TERM . SHORT TERM . LONG TERM . AVIATION . MARINE .

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
ACXS1 - ACE Basin Reserve, SC	20 mi	111 min	N 2.9	62°F			1019 hPa	29°F
41033	26 mi	28 min	E 14 G 18	53°F	56°F		1017.2 hPa
FPKG1 - 8670870 - Fort Pulaski, GA	32 mi	48 min	E 14 G 15	55°F	57°F		1018.4 hPa
FBIS1 - Folly Island, SC	51 mi	36 min	E 13 G 15	53°F			1018.6 hPa (-0.9)

Wind History for Fort Pulaski, GA

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N6 G9

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E17 G21

E14 G18

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N13 G17

N5 G11

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NE18 G23

NE14 G17

NE15 G19

NE12 G16

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E18 G25

NE14 G18

NE13 G17

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NE13 G17

NE18 G23

NE13 G19

NE11 G15

N9 G12

NE12 G15

N10 G13

NE12 G15

N13 G17

N14 G21

N11 G14

N15 G19

N13 G17

N12 G16

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Beaufort, Marine Corps Air Station, SC	5 mi	40 min	N 9	10.00 mi	A Few Clouds	65°F	28°F	25%	1017.6 hPa
Beaufort County Airport, SC	11 mi	41 min	E 6	10.00 mi	Fair	61°F	34°F	36%	1017.6 hPa
Hilton Head Island, Hilton Head Airport, SC	20 mi	46 min	E 9 G 14	10.00 mi	Fair	57°F	37°F	48%	1018.3 hPa

Link to 5 minute data for KNBC

Wind History from NBC (wind in knots)

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NW6

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N6

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NE10 G16

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N15 G20

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Tide / Current Tables for Corning Landing, Whale Branch, South Carolina

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Tide / Current Tables for Hwy. 170 bridge, Broad River, South Carolina

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Weather Map

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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