Sunday, January17, 2021
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Marine Weather and Tides
Sullivan's Island, 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 7:20AMSunset 5:39PM Sunday January 17, 2021 12:26 AM EST (05:26 UTC) Moonrise 10:30AMMoonset 10:14PM Illumination 15% Phase: Waxing Crescent; Moon at 4 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- 925 Pm Est Sat Jan 16 2021
Rest of tonight..W winds 5 to 10 kt.
Sun..W winds 10 to 15 kt with gusts to 20 kt.
Sun night..W winds 15 kt with gusts to 20 kt.
Mon..W winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
Mon night..W winds 10 to 15 kt.
Tue..NW winds 5 to 10 kt, becoming W in the afternoon.
Tue night..W winds 10 kt.
Wed..W winds 5 to 10 kt.
Wed night..W winds 5 to 10 kt.
Thu..SW winds 10 to 15 kt. A slight chance of showers.
Thu night..SW winds 15 kt. A chance of showers. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 53 degrees.
AMZ300 925 Pm Est Sat Jan 16 2021
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail through much of next week. A weak cold front is expected to pass over the region Friday.


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 170231 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 931 PM EST Sat Jan 16 2021

SYNOPSIS. High pressure will prevail through much of next week. A weak cold front is expected to pass over the region Friday.

NEAR TERM /UNTIL 6 AM SUNDAY MORNING/. The upper trough has pulled away from the region and H8 cold air advection is waning. Clear skies, low dewpoints and diminishing winds have allowed temperatures to fall a bit quicker than expected for some spots this evening, especially across interior Southeast Georgia. Adjusted hourly temperatures to match current trends with lows bottoming out in the upper 20s inland to the lower 30s near the coast with upper 30s at the beaches.

SHORT TERM /6 AM SUNDAY MORNING THROUGH TUESDAY/. Dry high pressure will prevail across the area through Tuesday. A weak upper vort will move through late Sunday and Sunday night, bringing scattered clouds at varying heights. Otherwise, we anticipate mostly sunny/clear skies through the period. High temps will show a gradual warming trend though readings will generally be in the 50s each day.

LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/. Surface high pressure will continue to dominate over the Southeast US, eventually advecting moisture from the Gulf into the Tennessee Valley. Shortwave energy and upper forcing looks to bring showers just outside the forecast area on Wednesday. However, little moisture over southeast SC/GA and surface dew points around 40F should keep any showers over the area elevated with little to no mentionable precipitation. On Thursday, a weak, slow-moving cold front approaches the region from the northwest. Showers ahead/along the front are possible Thursday afternoon into the overnight period. A second round of showers is possible Friday night/Saturday due to shortwave energy extending from an upper trough over the Northeast US. Overall, a gradual warming trend is anticipated through the period with highs climbing well into the 60s late week.

AVIATION /03Z SUNDAY THROUGH THURSDAY/. VFR.

Extended Aviation Outlook: VFR expected to prevail.

MARINE. Overnight: Winds and seas will continue to diminish. The Small Craft Advisories for Charleston Harbor and the nearshore waters from Edisto Beach to Altamaha Sound have been cancelled as conditions have dropped below advisory levels. The advisory for the Charleston Nearshore waters and Georgia offshore leg will expire at 1 AM as it will take a few more hours for conditions to drop below critical levels there.

Sunday through Thursday: Sunday morning we expect winds/seas to be below advisory thresholds. Another surge is expected Sunday afternoon through Monday with the passage of an upper disturbance and dry cold front. We could need Small Craft Advisories for portions of the waters due to frequent 25 kt gusts. Thereafter, benign conditions anticipated until Thursday when another WSW wind surge is anticipated.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . Small Craft Advisory until 1 AM EST Sunday for AMZ350-374.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 1 mi57 min W 4.1 G 8 42°F 54°F1016.1 hPa
FBIS1 - Folly Island, SC 6 mi87 min W 6 G 8 42°F 1016.1 hPa (+1.4)
ACXS1 - ACE Basin Reserve, SC 32 mi102 min Calm 37°F 1016 hPa30°F
41033 43 mi79 min NW 14 G 19 47°F 55°F1016 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 47 mi37 min WNW 19 G 25 50°F 67°F1015.5 hPa34°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC7 mi32 minN 010.00 miFair36°F30°F81%1015.9 hPa
Mount Pleasant Regional-Faison Field, SC11 mi32 minN 010.00 miFair39°F28°F65%1015.6 hPa
Charleston, Charleston Air Force Base, SC12 mi31 minW 410.00 miFair37°F26°F65%1015.5 hPa

Link to 5 minute data for KJZI

Wind History from JZI (wind in knots)
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Tide / Current Tables for Charleston, South Carolina
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Charleston
Click for Map
Sun -- 04:38 AM EST     0.03 feet Low Tide
Sun -- 07:21 AM EST     Sunrise
Sun -- 10:30 AM EST     Moonrise
Sun -- 11:07 AM EST     5.29 feet High Tide
Sun -- 05:12 PM EST     0.09 feet Low Tide
Sun -- 05:38 PM EST     Sunset
Sun -- 10:14 PM EST     Moonset
Sun -- 11:24 PM EST     4.70 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.33.32.10.90.20.10.71.83.14.14.95.354.231.70.60.10.31.22.33.44.24.7

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Sun -- 02:12 AM EST     -2.02 knots Max Ebb
Sun -- 05:16 AM EST     0.00 knots Slack
Sun -- 07:21 AM EST     Sunrise
Sun -- 07:42 AM EST     1.51 knots Max Flood
Sun -- 10:30 AM EST     Moonrise
Sun -- 11:30 AM EST     -0.00 knots Slack
Sun -- 02:43 PM EST     -2.19 knots Max Ebb
Sun -- 05:38 PM EST     Sunset
Sun -- 05:49 PM EST     0.00 knots Slack
Sun -- 08:02 PM EST     1.44 knots Max Flood
Sun -- 10:14 PM EST     Moonset
Sun -- 11:41 PM EST     -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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-0.9-1.6-2-1.8-1.1-0.30.71.41.51.310.4-0.5-1.4-2-2.2-1.7-0.80.21.11.41.30.90.5

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




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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.