Friday, January17, 2020
Privacy Policy
L-36.com


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 7:20AMSunset 5:39PM Friday January 17, 2020 11:22 AM EST (16:22 UTC) Moonrise 12:16AMMoonset 12:11PM Illumination 51% 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
    EDIT      (on/off)   Help
AMZ330 Charleston Harbor- 1033 Am Est Fri Jan 17 2020
.small craft advisory in effect until 4 pm est this afternoon...
Rest of today..NE winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
Tonight..NE winds 10 to 15 kt with gusts to 20 kt.
Sat..E winds 10 kt, becoming S in the afternoon. A slight chance of showers.
Sat night..SW winds 10 to 15 kt with gusts to 20 kt. A chance of showers.
Sun..W winds 10 kt. A chance of showers, mainly in the morning.
Sun night..N winds 10 kt.
Mon..N winds 10 kt.
Mon night..N winds 10 kt.
Tue..N winds 10 to 15 kt.
Tue night..N winds 10 kt. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 60 degrees.
AMZ300 1033 Am Est Fri Jan 17 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will build into the area through Saturday. A cold front is expected to move through Saturday night into Sunday, followed by cold and dry high pressure through the middle of next week.


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


Area Discussion for - Charleston, SC
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS62 KCHS 171537 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1037 AM EST Fri Jan 17 2020

SYNOPSIS. High pressure will build into the area through Saturday. A cold front is expected to move through Saturday night into Sunday, followed by cold and dry high pressure through the middle of next week.

NEAR TERM /THROUGH TONIGHT/. A considerably cooler airmass will continue to build into the area from the north today as high pressure shifts toward the Mid Atlantic region. The column is much drier this morning: The Precipitable Water value from the KCHS sounding dropped from 1.50" to 0.26" in the last 24 hours. High temps are on track to reach low 50s north to upper 50s south.

Tonight: Upper ridging will shift over the southeast states while a weak coastal trough develops overnight as warm air advection processes tend to take shape. Inland areas will decouple in the evening and temps will fall into the 30s while coastal areas keep a light northeast breeze. We did lower min temps for many inland areas as the air mass is dry and we typically seeing decoupling develop a bit sooner. Late tonight, there will be some increase in clouds as mid level moisture increases along with stratocu from the Atlantic as increasing isentropic lift develops.

Lake Winds: A Lake Wind Advisory remains in effect for Lake Moultrie for gusty north winds and waves 1-2 ft, highest over the central and southern portions of the lake.

SHORT TERM /SATURDAY THROUGH MONDAY/. Saturday: A wedge of high pressure will gradually break down through morning hours while a coastal trough develops off the coast, then lifts north with a warm front during the afternoon. Guidance suggests most areas to remain dry during the day, but a few showers are possible along the Southeast South Carolina coast near the vicinity of the coastal trough, then perhaps well inland as mid-lvl forcing increases late. Highs will be limited to clouds and a slow warming start within a northeast wind, but should reach 60 degrees across the Tri-County area and mid/upper 60s across Southeast Georgia (highest south of I-16) during the afternoon. Overnight, precip chances will ramp up with the approach of a cold front from the northwest. Precip coverage should peak across the area late with numerous showers possible heading into daybreak. Lows will remain mild, dipping into the low/mid 50s well inland to upper 50s closer to the coast.

Sunday: A cold front will likely progress through the area during morning hours, favoring scattered to numerous showers (highest coverage along the Southeast Georgia coast). Cooler high pressure will then build in wake of the front, favoring a downward trend in temps during afternoon hours. In general, highs should range in the low/mid 60s, mainly ahead of fropa early. Precip chances will quickly come to an end once fropa occurs, starting early afternoon inland, then by late afternoon near the coast. Conditions will then remain dry through the overnight period while colder air arrives from the west-northwest. In general, temps should cool into the mid/upper 30s away from the immediate coast.

Monday: Dry and cooler high pressure will prevail at the sfc below a broad trough of low pressure expands across much of the East Conus. The pattern will result in noticeably colder conditions with temps some 10-15 degrees lower than the previous day. In general, highs should struggle to reach the upper 40s well inland and low/mid 50s across Southeast Georgia.

LONG TERM /MONDAY NIGHT THROUGH THURSDAY/. A large area of high pressure will dominate much of the East Conus with its center slowly shifting across the Midwest early week then into the Northeast by late week. Aloft, a large trough of low pressure will build across the region with its axis shifting across the area by Tuesday morning, followed by a period of weak ridging mid to late week. The pattern will result in a period of dry and cold weather Monday night and Tuesday, before conditions gradually warm through late week. Overnight lows will likely dip into the upper 20s inland to lower 30s near the coast Monday night and Tuesday night while highs only reach the mid/upper 40s Tuesday afternoon.

Temps will slowly warm Wednesday and Thursday as the main center of high pressure shifts across the Northeast and begins to turn winds more onshore. However, temps will still remain at or below normal for this time of year with highs only in the low/mid 50s Wednesday, then mid/upper 50s Thursday. On Friday, onshore winds should prevail as high pressure begins to shift off the East Coast and temps will continue to warm as a ridge axis extends across the Southeast aloft. Highs should peak in the mid/upper 60s Friday afternoon, well ahead of a cold front approaching the region during the weekend.

AVIATION /16Z FRIDAY THROUGH TUESDAY/. VFR. There will be occasional surface gusts to 20 kt this morning, especially at KCHS.

Extended Aviation Outlook: Flight restrictions are possible at both CHS and SAV Saturday due to low clouds associated with a coastal trough and warm front lifting north across the region. Additional flight restrictions are possible Saturday night into early Sunday during showers associated with a passing cold front. VFR conditions are then expected at both terminals Sunday afternoon through the middle of next week.

MARINE. Today: Strong high pressure is forecast to wedge south to the lee of the mountains today with tight pressure gradients likely to persist through the day. We have maintained SCAs all waters including the CHS Harbor into the afternoon hours. Winds will frequently be in the 20-25 kt ranges with some gusts topping 30 kt expected offshore. In fact, there could be near gale force conditions near the western wall of the Gulf Stream. Tonight, we think models may be just a bit quick in subsiding seas and perhaps with slowly decreasing wind speeds. We extended SCAs for near shore waters a bit longer to encompass much of the overnight period.

Saturday through Wednesday: Gusty northeast winds will gradually veer to the south and weaken Saturday as a coastal trough develops near the Southeast Coast and lifts north with warm front. However, lingering 6 ft seas across offshore Georgia waters will support the continuation of a Small Craft Advisory into Sunday. A cold front is expected to push offshore on Sunday with dry high pressure in its wake. Strong cold air advection across the waters along with a tight pressure gradient will support elevated wind/sea conditions early next week, especially Monday night through Tuesday night when conditions are at their peak. Small Craft Advisories are possible for at least a portion of the coastal waters during this period and could linger through Wednesday as north/northeast winds prevail heading into the second half of next week.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . Lake Wind Advisory until 1 PM EST this afternoon for SCZ045. MARINE . Small Craft Advisory until 5 AM EST Saturday for AMZ350-352- 354. Small Craft Advisory until 7 PM EST Sunday for AMZ374. Small Craft Advisory until 4 PM EST this afternoon for AMZ330.

NEAR TERM . JRL SHORT TERM . DPB LONG TERM . DPB AVIATION . MARINE .


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 1 mi53 min NNE 15 G 20 51°F 60°F1036.8 hPa
FBIS1 - Folly Island, SC 6 mi83 min NE 17 G 21 48°F 1036.6 hPa (+3.0)30°F
41029 - Capers Nearshore (CAP 2) 15 mi75 min ENE 21 G 31 49°F 59°F1037.1 hPa
ACXS1 - ACE Basin Reserve, SC 32 mi98 min NNE 7 50°F 1036 hPa20°F
41033 43 mi75 min ENE 21 G 31 51°F 59°F1036.1 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 47 mi33 min 25 G 33 69°F1035.4 hPa

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
Last
24hr
1 day
ago
2 days
ago

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC7 mi28 minNNE 8 G 1310.00 miFair52°F19°F28%1036.6 hPa
Mount Pleasant Regional-Faison Field, SC11 mi28 minVar 6 G 1210.00 miFair50°F21°F32%1036.9 hPa
Charleston, Charleston Air Force Base, SC12 mi87 minNE 16 G 2010.00 miA Few Clouds50°F19°F30%1036.3 hPa

Link to 5 minute data for KCHS

Wind History from CHS (wind in knots)
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
Last 24hrNW17
G21
NW15
G21
N15N12N14N13
G22
N9N13N10N11N9N9N9N8N10N11N10N12
G21
NE9NE11NE12NE14NE16
G20
NE14
1 day agoW5W5NW5W4CalmW5W4W3SW4SW3SW5SW5SW4S7W7W4W6W5SW6W8W7SW9W8W10
2 days agoSW7SW6SW8W7W6SW6SW5S6SW6SW6SW6S6SW5CalmCalmNW3CalmS3CalmCalmSW4S3S5Calm

Tide / Current Tables for Fort Johnson, South Carolina
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
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
   EDIT      (on/off)   Help   One Week of Data
Charleston Harbor Entrance
Click for Map
Fri -- 12:16 AM EST     Moonrise
Fri -- 01:38 AM EST     -0.00 knots Slack
Fri -- 04:49 AM EST     -2.40 knots Max Ebb
Fri -- 07:21 AM EST     Sunrise
Fri -- 07:51 AM EST     0.00 knots Slack
Fri -- 08:00 AM EST     Last Quarter
Fri -- 10:10 AM EST     1.68 knots Max Flood
Fri -- 12:11 PM EST     Moonset
Fri -- 01:49 PM EST     -0.00 knots Slack
Fri -- 05:10 PM EST     -2.27 knots Max Ebb
Fri -- 05:37 PM EST     Sunset
Fri -- 08:20 PM EST     0.00 knots Slack
Fri -- 10:47 PM EST     1.58 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.10.6-0.4-1.4-2.2-2.4-1.9-0.90.21.21.71.51.10.7-0.2-1.1-1.9-2.3-2-1.3-0.30.61.41.6

Weather Map
       (on/off)   Help Weather Map
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 (11,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Charleston, SC
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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.