Wednesday, October28, 2020
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Marine Weather and Tides
Edisto Beach, SC

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:33AMSunset 6:33PM Wednesday October 28, 2020 9:13 PM EDT (01:13 UTC) Moonrise 4:27PMMoonset 3:48AM Illumination 92% Phase: Waxing Gibbous; Moon at 12 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- 731 Pm Edt Wed Oct 28 2020
.small craft advisory in effect from Thursday morning through Friday morning...
Tonight..SE winds 10 kt, becoming S 15 to 20 kt late. Seas 2 to 3 ft, building to 3 to 4 ft after midnight.
Thu..S winds 20 to 25 kt with gusts to 30 kt. Seas 4 to 5 ft, building to 4 to 6 ft in the afternoon. A chance of showers with a slight chance of tstms in the afternoon.
Thu night..SW winds 20 to 25 kt, becoming W after midnight. Seas 4 to 6 ft. A chance of showers with a slight chance of tstms in the evening, then a chance of showers after midnight.
Fri..NW winds 20 to 25 kt with gusts to 30 kt, diminishing to 10 to 15 kt with gusts to 20 kt in the afternoon. Seas 4 to 6 ft, subsiding to 3 to 4 ft in the afternoon.
Fri night..NE winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft, building to 4 to 6 ft after midnight.
Sat..NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft. A slight chance of showers.
Sat night..NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft, subsiding to 4 to 5 ft after midnight. A chance of showers.
Sun..NE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers.
Sun night..NW winds 20 to 25 kt. Seas 3 to 4 ft. A slight chance of showers.
Mon..N winds 20 to 25 kt. Seas 4 to 6 ft.
Mon night..N winds 15 to 20 kt. Seas 3 to 4 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 731 Pm Edt Wed Oct 28 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will linger through tonight. A large storm system will bring impacts to the region Thursday, followed by a cold front Thursday night. High pressure returns for the weekend. A dry cold front is expected early next week, followed by more high pressure.


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 282344 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 744 PM EDT Wed Oct 28 2020

SYNOPSIS. High pressure will linger through tonight. A large storm system will bring impacts to the region Thursday, followed by a cold front Thursday night. High pressure returns for the weekend. A dry cold front is expected early next week, followed by more high pressure.

NEAR TERM /UNTIL 6 AM THURSDAY MORNING/. Early this evening: Overall, all is clear on radar with just a few very light returns showing up over the coastal waters. Zeta will continue to progress inland to the northeast overnight, and the forecast area will gradually come under the broader flow regime around the periphery of the tropical cyclone. Can't completely rule out an isolated shower developing and moving northward at any time, but didn't feel like the likelihood was enough to carry any rain chances in the forecast. Instead, the main change will be increasing southerly flow through the night. Warm advection will result in lows occurring late this evening with temperatures holding steady and even rising through the latter part of the tonight period through sunrise. Temperatures will be in the low 70s for most areas through most of the night. As a reference, typical lows for late October are in the low 50s for most locations.

SHORT TERM /6 AM THURSDAY MORNING THROUGH SATURDAY/. Thursday: The mid-levels will consist of an strong trough and embedded low over the Southern Plains in the morning. These features will move eastward with time, passing over our region late at night. At the surface, the remnants of TC Zeta will have combined with a separate storm system in the morning, resulting in a large storm system that will bring impacts to the eastern third of the country. This new system will be situated just to our west and shall continue to track to our north throughout the day. This system will provide an abundance of DPVA/forcing, but its target area for the majority of the hazards maintains just west and north of the forecast area. Showers and thunderstorms are possible in the far inland SC/GA counties most likely during the afternoon and evening period. Late Thursday night, a cold front trailing the system to the north will approach the region. While surface forcing and deep pre-frontal moisture (PWATS ranging from 2.0" to 2.5") are present, substantial upper-level forcing and instability are lacking. Shear tops out around 50 kt, which increases the threat for rotation in thunderstorms leading to the potential for an isolated brief tornado.

An additional concern is for gusty winds ahead of, with, and just behind the front. A Lake Wind Advisory has been issued for Lake Moultrie starting 8 AM Thursday. Beyond that, drier air and clearing conditions are expected to move in from the west after midnight. This will be the last day of 80 degree temperatures for our area this week, which could put some record high temperatures at risk of being broken. Low temperatures are expected to plummet, ranging from the mid/upper 50s to the low 60s along the beaches.

Friday and Saturday: A mid-level trough over the East Coast in the morning will shift offshore with time. A surface cold front will offshore Friday morning, meanwhile high pressure will deepen to our north and ridging will build into our forecast area. A significantly drier air mass will build in from the northwest. Strong subsidence noted by model soundings will result in clear skies both days. Strong cold air advection Friday through Saturday within northerly llvl winds will lead to much colder temperatures. Highs will only be in the low to mid 70s Friday, and expected to be even cooler Saturday with highs in the upper 60s/low 70s. Friday night lows will range from near 50F to the upper 50s along the immediate coast.

LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/. A long-wave trough is expected to move over the East Coast Sunday into Monday, then move offshore on Tuesday. At the surface, a dry cold front is expected to move through Sunday night, followed by continental high pressure. Expect temperatures well below normal Monday and Tuesday.

AVIATION /00Z THURSDAY THROUGH MONDAY/. VFR conditions are expected to prevail for most of the period through 00z Friday. Winds will increase late tonight, and become quite gusty Thursday morning, and into the evening. Frequent gusts to almost 30 knots can be expected at KCHS, and perhaps a couple of knots less at KSAV. A cold front will approach from the west Thursday and scattered thunderstorms will be possible. The chance for thunderstorms decreases closer to the coast, so the overall thunder potential at the terminals is still low. Introduced a prevailing VCSH at both sites around 20-21z. Can't completely rule out a period of MVFR ceilings around sunrise, but chances are low and we have maintained a VFR forecast.

Extended Aviation Outlook: A storm system will bring flight restrictions and gusty winds Thursday into Thursday night. High pressure is expected to bring gusty winds Friday and Saturday, mainly during the daylight hours.

MARINE. Tonight: The pressure gradient across the marine zones will gradually tighten tonight as a strong cold front approaches from the west. Winds this evening will remain from the SE then veer from the south late tonight. Speeds are forecast to increase from 10 to 15 kts this evening to 15 to 20 kts by late tonight. The outer GA waters are expected to see gust increase to around 25kts with 6 ft seas. Within 20 nm from shore, seas of 3-5 ft are expected by late tonight.

Thursday: A strong low pressure system "containing" the remnants of Zeta will pass to our north on Thursday with its trailing front crossing our offshore area late Thursday night. The pressure gradient will rapidly increase Thursday and will result in increasing winds and building seas. Small Craft Advisories have been issued for all waters, including the Charleston Harbor, beginning 8 AM Thursday. The worst conditions are expected with frontal passage Thursday evening. Gusts could reach Gale force across portions of the waters during that time period, thus a Gale Watch has been issued for the Charleston County waters out 20 nm and the outer GA waters. Additionally, seas could reach up to 7-8 ft in those waters.

Friday through Monday: The front will be offshore Friday morning and quickly moving away. Meanwhile, high pressure will build in from the north and west, which will lead to a brief window of lower winds and seas Friday afternoon. However, conditions will deteriorate again Friday night as cold air advection increases and the pressure gradient steepens. These near gale conditions should persist through Saturday night. By Sunday the cold air advection slackens and the pressure gradient levels off, leading to lower winds and seas. A dry cold front is expected to move through the region Sunday night into Monday.

Rip Currents: There is a Moderate risk at all of our beaches on Thursday and Friday.

CLIMATE. Record warmth possible Thursday, October 29:

KCHS: 85/1946 and 72/1984

KCXM: 82/1984 and 72/1984

KSAV: 87/1996 and 71/2019

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . Lake Wind Advisory from 10 AM to 6 PM EDT Thursday for SCZ045. MARINE . Small Craft Advisory from 8 AM Thursday to 11 AM EDT Friday for AMZ352-354. Gale Watch late Thursday night for AMZ350-374. Small Craft Advisory from 8 AM Thursday to midnight EDT Thursday night for AMZ350. Small Craft Advisory from 5 AM Thursday to midnight EDT Thursday night for AMZ374. Small Craft Advisory from 8 AM Thursday to 8 AM EDT Friday for AMZ330.



NEAR TERM . BSH SHORT TERM . BRM LONG TERM . MS AVIATION . BSH/BRM MARINE . NED/BRM CLIMATE .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 9 mi88 min ESE 1.9 76°F 1017 hPa70°F
41033 15 mi65 min SE 7.8 G 12 76°F 75°F1016.9 hPa
FBIS1 - Folly Island, SC 27 mi73 min SE 8.9 G 9.9 76°F 1018.3 hPa (-0.3)
CHTS1 30 mi55 min SE 7 G 8.9 76°F 76°F1017.8 hPa
41029 - Capers Nearshore (CAP 2) 43 mi65 min SE 7.8 G 12 76°F 74°F1017.6 hPa
FPKG1 - 8670870 - Fort Pulaski, GA 44 mi55 min SE 6 G 8.9 77°F 76°F1017.1 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort County Airport, SC17 mi18 minESE 310.00 miFair73°F69°F89%1016.6 hPa
Beaufort, Marine Corps Air Station, SC21 mi17 minESE 710.00 miOvercast77°F72°F85%1016.5 hPa
Charleston Executive Airport, SC23 mi18 minESE 510.00 miFair75°F69°F83%1017.3 hPa

Link to 5 minute data for KARW

Wind History from ARW (wind in knots)
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Last 24hrCalmCalmCalmCalmE3E3E3CalmE3NE3E4E3E6E5SE9E7SE7SE7SE7SE5
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1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE3NE6NE8NE4E4NE3E5E4E6SE4SE4SE4SE3E3
2 days agoCalmCalmCalmNE5NE7N3NE6NE9NE9NE8N8NE7NE8NE4NE6NE6N4NE6NE4NE4N4N3N6Calm

Tide / Current Tables for Edisto Marina, Big Bay Creek entrance, South Carolina
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Edisto Marina
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Wed -- 12:22 AM EDT     0.72 feet Low Tide
Wed -- 04:48 AM EDT     Moonset
Wed -- 06:23 AM EDT     6.36 feet High Tide
Wed -- 07:35 AM EDT     Sunrise
Wed -- 12:44 PM EDT     0.96 feet Low Tide
Wed -- 05:27 PM EDT     Moonrise
Wed -- 06:33 PM EDT     Sunset
Wed -- 06:50 PM EDT     6.41 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.91.73.14.55.76.36.25.64.63.32.11.211.52.645.36.26.4653.72.3

Tide / Current Tables for Ocella Creek, 2 mi. above entrance, South Carolina
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Ocella Creek
Click for Map
Wed -- 12:29 AM EDT     0.76 feet Low Tide
Wed -- 04:48 AM EDT     Moonset
Wed -- 07:08 AM EDT     6.10 feet High Tide
Wed -- 07:35 AM EDT     Sunrise
Wed -- 12:51 PM EDT     0.88 feet Low Tide
Wed -- 05:26 PM EDT     Moonrise
Wed -- 06:33 PM EDT     Sunset
Wed -- 07:31 PM EDT     6.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.91.52.63.84.95.76.15.84.93.72.31.20.91.32.33.44.65.56.16.15.44.22.7

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
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.