Friday, March5, 2021
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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.

Sunrise 6:43AMSunset 6:25PM Friday March 5, 2021 2:36 PM EST (19:36 UTC) Moonrise 12:33AMMoonset 11:04AM Illumination 54% Phase: Third Quarter Moon; Moon at 22 days in cycle
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- 1244 Pm Est Fri Mar 5 2021
This afternoon..NE winds 15 to 20 kt, diminishing to 10 to 15 kt late. Seas 3 to 4 ft.
Tonight..NE winds 10 to 15 kt. Seas 2 to 3 ft.
Sat..NE winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Sat night..NE winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft.
Sun..N winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft.
Sun night..N winds 10 to 15 kt. Seas 2 to 3 ft.
Mon..NE winds 10 to 15 kt. Seas 2 ft.
Mon night..E winds 5 to 10 kt. Seas 2 ft.
Tue..NE winds 5 to 10 kt. Seas 2 ft.
Tue night..E winds 5 to 10 kt. Seas 2 ft.
AMZ300 1244 Pm Est Fri Mar 5 2021
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail into next week.


7 Day Forecast for Marine Location Near Laurel Bay, SC
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location: 32.49, -80.82     debug


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 .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 20 mi111 min N 2.9 62°F 1019 hPa29°F
41033 26 mi28 min E 14 G 18 53°F 56°F1017.2 hPa
FPKG1 - 8670870 - Fort Pulaski, GA 32 mi48 min E 14 G 15 55°F 57°F1018.4 hPa
FBIS1 - Folly Island, SC 51 mi36 min E 13 G 15 53°F 1018.6 hPa (-0.9)

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort, Marine Corps Air Station, SC5 mi40 minN 910.00 miA Few Clouds65°F28°F25%1017.6 hPa
Beaufort County Airport, SC11 mi41 minE 610.00 miFair61°F34°F36%1017.6 hPa
Hilton Head Island, Hilton Head Airport, SC20 mi46 minE 9 G 1410.00 miFair57°F37°F48%1018.3 hPa

Link to 5 minute data for KNBC

Wind History from NBC (wind in knots)
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Last 24hrNW6NW6W6W4Calm--SW6S3CalmCalmCalmCalm--N6N7N7N7N10NE11NE10NE9N10NE5N9
1 day agoN13N11NW9NW4W4CalmNW3NW4CalmNW4SW3CalmCalmSW4SW3CalmCalmCalmN6NE33SE4E3NW7
2 days agoE7NE7NE4NE6NE8E7N7N6N10NE9NE11NE10
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Tide / Current Tables for Corning Landing, Whale Branch, South Carolina
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Corning Landing
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Fri -- 12:33 AM EST     Moonrise
Fri -- 02:13 AM EST     8.39 feet High Tide
Fri -- 06:45 AM EST     Sunrise
Fri -- 08:26 AM EST     0.08 feet Low Tide
Fri -- 11:04 AM EST     Moonset
Fri -- 02:35 PM EST     7.36 feet High Tide
Fri -- 06:23 PM EST     Sunset
Fri -- 08:32 PM EST     Last Quarter
Fri -- 08:35 PM EST     -0.01 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.57.88.48.16.95.23.11.30.20.31.334.86.37.27.36.44.831.30.20.112.6

Tide / Current Tables for Hwy. 170 bridge, Broad River, South Carolina
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Hwy. 170 bridge
Click for Map
Fri -- 12:33 AM EST     Moonrise
Fri -- 01:27 AM EST     7.73 feet High Tide
Fri -- 06:45 AM EST     Sunrise
Fri -- 07:47 AM EST     0.10 feet Low Tide
Fri -- 11:04 AM EST     Moonset
Fri -- 01:49 PM EST     6.79 feet High Tide
Fri -- 06:23 PM EST     Sunset
Fri -- 07:56 PM EST     -0.01 feet Low Tide
Fri -- 08:32 PM EST     Last Quarter
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.97.67.66.85.33.51.70.40.10.82.33.95.56.56.86.24.93.21.60.4-00.51.93.6

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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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