Thursday, April2, 2020
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Marine Weather and Tides
Sullivan's Island, 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 7:04AMSunset 7:42PM Thursday April 2, 2020 2:21 AM EDT (06:21 UTC) Moonrise 12:41PMMoonset 2:22AM Illumination 67% Phase: Waxing Gibbous; Moon at 9 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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AMZ330 Charleston Harbor- 1206 Am Edt Thu Apr 2 2020
Rest of tonight..N winds 5 kt or less.
Thu..NW winds 5 to 10 kt.
Thu night..NW winds 5 to 10 kt.
Fri..NW winds 5 to 10 kt.
Fri night..NW winds 5 kt.
Sat..NE winds 5 to 10 kt, becoming E in the afternoon.
Sat night..SE winds 5 to 10 kt.
Sun..SE winds 5 to 10 kt.
Sun night..S winds 5 to 10 kt.
Mon..SW winds 5 to 10 kt.
Mon night..S winds 10 kt. A chance of showers. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 67 degrees.
AMZ300 1206 Am Edt Thu Apr 2 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail into early next week. A weakening front will approach the region during the early to middle of next week.


7 Day Forecast for Marine Location Near Sullivan's Island, SC
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location: 32.77, -79.91     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 020411 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1211 AM EDT Thu Apr 2 2020

SYNOPSIS. High pressure will prevail into early next week. A weakening front will approach the region during the early to middle of next week.

NEAR TERM /UNTIL 6 AM THIS MORNING/. Clouds are finally starting to quickly erode and expect mostly clear skies to prevail through sunrise with only some thin cirrus passing through. Winds have gone calm for most areas within a decoupled boundary layer and have lowered winds to calm for the midnight update. Lows will range from the mid 40s inland to the lower-mid 50s at the beaches.

SHORT TERM /6 AM THIS MORNING THROUGH SATURDAY/. High confidence this period with high pressure maintaining dry weather and near to below normal temperatures. Temperatures will generally modify through the period, except possibly Saturday when there will be a bit more cloud cover. Can't completely rule out some sheltered inland spots dipping into the upper 30s Thursday night.

LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/. Surface high pressure will remain in control through early next week. Models show a weak front approaching the region, however it appears to stall and/or dissipate before reaching the forecast area. Dry conditions are expected on Sunday and possibly Monday, then rain chances will return as moisture increases and shortwave energy passes through. Temperatures through the period will be above normal as heights build aloft.

AVIATION /04Z THURSDAY THROUGH MONDAY/. VFR. Winds could get a little gusty during peak heating, but no major impacts are expected.

Extended Aviation Outlook: Low risk for restrictions mainly starting Monday for low clouds and/or showers.

MARINE. Tonight: High pressure will build in from the north but the pressure gradient will be relaxed from the daytime period. Winds will be out of the north, with wind speeds decreasing through the night. Speeds will start out this evening as high as 15-20 knots, and will end more in the 10-15 knot range by sunrise Thursday. Seas will also steadily drop off, becoming 2-4 feet by late tonight.

Thursday through Monday: High confidence this period with no significant concerns as high pressure prevails. Small risk for marginal Small Craft Advisory conditions in the offshore waters starting Saturday night as seas potentially build to 6 feet beyond 40 nm.

TIDES/COASTAL FLOODING. Elevated tide levels are expected through at least early next week due to astronomical influences from the upcoming full moon and lunar perigee as well as onshore winds and swells. Minor saltwater flooding will be possible around the times of high tide, especially each evening.

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




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 1 mi51 min WNW 1 G 1.9 57°F 67°F1015.6 hPa
FBIS1 - Folly Island, SC 6 mi81 min NNW 2.9 G 4.1 57°F 1015.8 hPa (+0.5)46°F
41029 - Capers Nearshore (CAP 2) 15 mi73 min NNE 7.8 G 9.7 60°F 67°F1015 hPa
ACXS1 - ACE Basin Reserve, SC 32 mi96 min Calm 51°F 1016 hPa48°F
41033 43 mi73 min ENE 5.8 G 9.7 61°F 66°F1014.5 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 47 mi31 min 12 G 16 61°F 70°F4 ft1014.9 hPa55°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC7 mi86 minno data10.00 miOvercast52°F48°F88%1015.6 hPa
Mount Pleasant Regional-Faison Field, SC11 mi86 minN 010.00 miMostly Cloudy52°F50°F94%1015.2 hPa
Charleston, Charleston Air Force Base, SC12 mi85 minN 010.00 miPartly Cloudy51°F46°F83%1015.2 hPa

Link to 5 minute data for KCHS

Wind History from CHS (wind in knots)
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Last 24hrN13N15
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N10N9N4N3CalmCalmCalmCalmNW3
1 day agoCalmCalmNW3S4CalmCalmNE4E8E11E11E9E15E13E10SE13NW14
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N15--W5W4W9NW9N11N12
2 days agoSW6W5W5W4W5W5NW7NW8NW9NW7N6NW8W5W9W6NW11W5NW5CalmCalmW5W5W3Calm

Tide / Current Tables for Fort Johnson, South Carolina
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Thu -- 12:08 AM EDT     1.46 knots Max Flood
Thu -- 03:22 AM EDT     Moonset
Thu -- 03:41 AM EDT     -0.00 knots Slack
Thu -- 07:05 AM EDT     Sunrise
Thu -- 07:14 AM EDT     -1.88 knots Max Ebb
Thu -- 10:25 AM EDT     0.00 knots Slack
Thu -- 12:41 PM EDT     1.20 knots Max Flood
Thu -- 01:41 PM EDT     Moonrise
Thu -- 03:58 PM EDT     -0.00 knots Slack
Thu -- 07:32 PM EDT     -1.72 knots Max Ebb
Thu -- 07:40 PM EDT     Sunset
Thu -- 10:29 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.30.80.4-0.2-1-1.6-1.9-1.7-1.1-0.30.411.20.80.4-0-0.7-1.3-1.7-1.7-1.2-0.40.4

Weather Map
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wmap_A
GEOS Local Image of Southeast    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
Wind Forecast for Charleston, SC (2,6,7,8)
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Ground Weather Radar Station Charleston, SC
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Disclaimer:
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.