Saturday, January18, 2020
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Marine Weather and Tides
Edisto Beach, SC

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:20AMSunset 5:39PM Saturday January 18, 2020 5:25 PM EST (22:25 UTC) Moonrise 1:23AMMoonset 12:49PM Illumination 38% Phase: Third Quarter Moon; Moon at 23 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- 329 Pm Est Sat Jan 18 2020
Tonight..S winds 10 to 15 kt with gusts to 20 kt, becoming sw 15 to 20 kt after midnight. Seas 4 to 5 ft. A chance of showers after midnight.
Sun..W winds 15 to 20 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft in the afternoon. A chance of showers, mainly in the morning.
Sun night..NW winds 15 to 20 kt. Seas 3 to 4 ft.
Mon..N winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft.
Mon night..N winds 10 to 15 kt. Seas 2 to 3 ft, building to 3 to 4 ft after midnight.
Tue..N winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft.
Tue night..N winds 20 kt with gusts to 25 kt. Seas 3 to 4 ft, building to 4 to 6 ft after midnight.
Wed..NE winds 15 to 20 kt. Seas 4 to 6 ft.
Wed night..NE winds 15 to 20 kt. Seas 4 to 6 ft.
Thu..NE winds 15 to 20 kt. Seas 4 to 5 ft. A slight chance of showers.
Thu night..E winds 10 to 15 kt. Seas 4 to 5 ft. A slight chance of showers.
AMZ300 329 Pm Est Sat Jan 18 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A cold front is expected to move through late tonight into Sunday morning. In the wake of the front, a cold and dry air mass will build over the region early next week and will remain until Thursday. A low pressure system will bring warmer temperatures and showers beginning Friday.


7 Day Forecast for Marine Location Near Edisto Beach, SC
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location: 32.48, -80.32     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 182104 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 404 PM EST Sat Jan 18 2020

SYNOPSIS. A cold front is expected to move through late tonight into Sunday morning. In the wake of the front, a cold and dry air mass will build over the region early next week and will remain until Thursday. A low pressure system will bring warmer temperatures and showers beginning Friday.

NEAR TERM /UNTIL 6 AM SUNDAY MORNING/. A rather slow-moving cold front will gradually move into the area overnight. The best upper vorticity energy will move in late tonight which coincides with the highest PW values around 1.5". Overall the forcing for ascent with this front is relatively weak given the deep layered flow becoming parallel to the front as it approaches. We delayed the PoPs a few hours this evening with mentionable values moving into far western areas after 10 pm. Highest PoPs are late tonight as the front moves into our area. Temps are expected to drop 5 or so degrees after sunset this evening but then rise again as southerly flow strengthens ahead of the front.

SHORT TERM /6 AM SUNDAY MORNING THROUGH TUESDAY/. Sunday: As the cold front progresses through the area during the morning hours, showers are expected to continually decrease until the afternoon, when cool and dry high pressure moves into the area. This will help decrease POPs quickly, with a mostly dry afternoon/evening. Temperatures are expected to be in the low to mid 60s. Throughout the night, temps will trend much cooler with lows in the high 30s, low 40s.

Monday and Tuesday: As high pressure continues to prevail, temperatures will be much lower than we have seen in recent days. While mid 40s to low 50s are expected, temps could actually stay lower. Into the night, temps will drop into the low 30s along the coast while inland will see upper 20s. Tuesday will start off quite cold and warm up to similar temps as Monday, just a little chiller.

It is interesting that a clipper-like system is expected to quickly ripple over the region on Tuesday, slowly closing off at H5. As the system passes over the CWA, H85 temperatures cool to -6 to -9C. Using a blend of MOS, highs on Tuesday are expected to remain 10-13 degrees below normal. The core of the mid and high level moisture is expected to pass to the south, however, cloud cover is expected to increase through the daylight hours on Tuesday. By late Tuesday, the mid-level disturbance will pass over the cold front over the western Atlantic, resulting in cyclogenesis east of the Gulf Stream. As a result, a few showers are forecast to develop across the outer GA waters, temperatures in the upper 40s to low 50s should support all liquid.

LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/. A large area of sfc high pressure will dominate much of the East Conus with its center shifting across the Midwest midweek, then into the Northeast by Friday. Aloft, a large trough of low pressure will begin to shift offshore midweek, setting up a period of mid-lvl ridging through late week. The pattern will favor cold temps Tuesday night with lows in the mid/upper 20s away from the coast, before conditions gradually warm as winds become more directly onshore through late week. Temps will likely warm into the low/mid 50s Wednesday, then mid 50s well inland to upper 50s/lower 60s on Thursday. On Friday, onshore winds should prevail as high pressure shifts off the East Coast. A developing coastal trough could also bring some showers onshore. In general, temps should approach the mid/upper 60s. Chances of precip should increase during the weekend as low pressure over the Gulf of Mexico merges with a cold front approaching from the west on Saturday. Scattered to potentially numerous showers are possible during peak forcing/moisture across the area Saturday afternoon.

AVIATION /21Z SATURDAY THROUGH THURSDAY/. Winds veering around to south this afternoon as a warm front lifts north. VFR expected through much of the night, then MVFR ceilings likely at both terminals as the cold front drops into the area late tonight through Sunday morning. Precipitation coverage associated with the front looks spotty so we only included vicinity showers at this time. VFR likely to return around 18Z Sunday.

Extended Aviation Outlook: VFR conditions are expected at both terminals Monday through the middle of next week.

MARINE. South to southwest winds increasing tonight ahead of a cold front. Seas will also build. We issued another Small Craft Advisory for the Charleston nearshore waters for seas edging back up to 6 ft over outer portions, along with some 25 kt gusts overnight. An SCA continues for the offshore GA waters for similar conditions.

Sunday: A cold front will sweep across the waters on Sunday. Winds are forecast to veer from SW during the morning from the WNW by the afternoon. Conditions are expected to become gusty, with frequent gusts to around 25 kts across AMZ350 and 374. Seas across these zones are forecast to range between 4 to 7 ft. Small Craft Advisories will remain until 6 PM Sunday.

On Monday, large high pressure centered over the Mid West will build SE across region. The pressure gradient across the marine zones should support gusts in the low 20s early Monday morning, decreasing to 20kts or less during the daylight hours.

Tuesday through Wednesday night: Low pressure will organize and deepen offshore as a mid-level disturbance arrives from the NW. The marine zones will remain between the developing low to the east and high pressure centered to the NW. This pattern will likely yield Small Craft Advisory conditions outside the CHS Harbor Tuesday through Wednesday night with gusty NE winds and building seas. On Thursday, seas above 6 ft may linger across AMZ374 through much of the day. High pressure will build over the area on Thursday, with gradually lowering wind gusts and seas.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . Small Craft Advisory until 6 PM EST Sunday for AMZ350-374.

NEAR TERM . JRL SHORT TERM . RAD/NED LONG TERM . DPB AVIATION . JRL/NED MARINE . JRL/NED


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 9 mi101 min S 1.9 63°F 1025 hPa55°F
41033 15 mi78 min ENE 1.9 G 3.9 60°F 59°F1026 hPa
FBIS1 - Folly Island, SC 27 mi86 min Calm G 0 60°F 1025.6 hPa (-2.4)59°F
CHTS1 30 mi56 min 64°F 59°F1024.6 hPa
41029 - Capers Nearshore (CAP 2) 43 mi78 min SSW 3.9 G 7.8 62°F 59°F1025.3 hPa
FPKG1 - 8670870 - Fort Pulaski, GA 44 mi56 min 63°F 58°F1024.5 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort County Airport, SC17 mi31 minSSW 810.00 miFair63°F53°F73%1023.7 hPa
Beaufort, Marine Corps Air Station, SC21 mi30 minSSE 710.00 miFair65°F55°F73%1023.4 hPa
Charleston Executive Airport, SC23 mi31 minN 06.00 miPartly Cloudy with Haze63°F55°F77%1023.7 hPa

Link to 5 minute data for KARW

Wind History from ARW (wind in knots)
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2 days agoS4CalmCalmCalmS4SW4SW3SW3W4S3SW3SW6W5W4W8SW4SW7W11
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Tide / Current Tables for Edisto Marina, Big Bay Creek entrance, South Carolina
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Edisto Marina
Click for Map
Sat -- 01:22 AM EST     Moonrise
Sat -- 02:00 AM EST     6.14 feet High Tide
Sat -- 07:22 AM EST     Sunrise
Sat -- 08:21 AM EST     0.14 feet Low Tide
Sat -- 12:49 PM EST     Moonset
Sat -- 02:14 PM EST     5.74 feet High Tide
Sat -- 05:40 PM EST     Sunset
Sat -- 08:37 PM EST     -0.24 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.85.86.15.84.93.62.10.90.20.31.22.545.25.75.54.73.420.8-0.1-0.20.51.8

Tide / Current Tables for Ocella Creek, 2 mi. above entrance, South Carolina
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Ocella Creek
Click for Map
Sat -- 01:22 AM EST     Moonrise
Sat -- 02:45 AM EST     5.80 feet High Tide
Sat -- 07:22 AM EST     Sunrise
Sat -- 08:31 AM EST     0.23 feet Low Tide
Sat -- 12:48 PM EST     Moonset
Sat -- 02:58 PM EST     5.23 feet High Tide
Sat -- 05:40 PM EST     Sunset
Sat -- 08:51 PM EST     -0.17 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.94.95.65.85.242.51.20.40.3123.24.255.24.83.82.51.10.1-0.20.31.3

Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (17,4,5,8)
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Ground Weather Radar Station Charleston, SC
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.