Wednesday, December11, 2019
Privacy Policy
L-36.com


Marine Weather and Tides
Charleston, SC

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:10AMSunset 5:15PM Wednesday December 11, 2019 12:56 AM EST (05:56 UTC) Moonrise 5:02PMMoonset 6:27AM Illumination 100% Phase: Full Moon; Moon at 14 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- 1241 Am Est Wed Dec 11 2019
Tonight..W 10 kt, becoming nw 10 to 15 kt with gusts to 20 kt late. A chance of showers.
Wed..N winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. A chance of showers in the morning.
Wed night..NE winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
Thu..NE winds 20 kt with gusts to 25 kt. Waves 1 to 2 ft. A slight chance of showers in the afternoon.
Thu night..NE winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. A slight chance of showers in the evening, then a chance of showers after midnight.
Fri..NE winds 10 to 15 kt with gusts to 20 kt, becoming E in the afternoon. Showers.
Fri night..SW winds 5 to 10 kt. Showers.
Sat..W winds 10 kt. A chance of showers.
Sat night..W winds 10 to 15 kt.
Sun..W winds 5 to 10 kt.
Sun night..N winds 5 kt. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 58 degrees.
AMZ300 1241 Am Est Wed Dec 11 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A cold front will push through the region tonight, with strong high pressure to build over the area Wednesday through Thursday. A low pressure system will impact the area late week, followed by a return to high pressure over the weekend into early next week.


7 Day Forecast for Marine Location Near Charleston, SC
   Hourly   EDIT   Help
location: 32.78, -79.93     debug


Area Discussion for - Charleston, SC
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS62 KCHS 110344 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1044 PM EST Tue Dec 10 2019

SYNOPSIS. A cold front will push through the region tonight, with strong high pressure to build over the area Wednesday through Thursday. A low pressure system will impact the area late week, followed by a return to high pressure over the weekend into early next week.

NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/. As of 1035 PM: Coastal observations generally indicate that temperatures have warmed by a degree or two over the past couple of hours. Dewpoints were observed in the mid 60s along the coast. I will update the near term temperatures to align with observations. HRRR sfc condensation pressure deficits fall to less than a mb off the SC coast, representing an area of potential sea fog. If sea fog develops, it will remain until a cold front sweeps from west to east across the region around midnight. I will keep a mention of patchy fog in the forecast. Regional radar indicates very little coverage of showers, I will keep PoPs unchanged.

As of 915 PM: Regional radar composite indicated a few patches of light rain lifting north across the forecast area this evening. I will keep PoPs in the SCHC to CHC range. Sfc observations along the coast indicated a few patches of fog, especially along the Charleston County coast. I will keep patchy fog in the forecast until the cold front arrives. Radar data and sfc observations indicate that the cold front was nearing the I-95 corridor from the west, expected to reach the coast by midnight.

As of 645 PM: Regional radar images indicated a fine line of showers, associated with a cold front, across the middle Carolinas southwest to the FL Panhandle, tracking east around 15 kts. Until the showers arrive, temperatures should remain nearly steady in the mid 60s. I will update the forecast to refine hourly temperature trends, sky, and weather.

Previous Discussion: Tonight: A cold front will advance into the region this evening and should be offshore by the early morning hours. Models have been consistent for several days now showing mainly scattered shower activity along and just behind the front, with the best coverage further north across the southeast South Carolina zones. Don't expect much measurable rainfall, generally less than a tenth of a inch before shower activity comes to an end late tonight. Immediately ahead of the front, winds will diminish and we could have a narrow window of time where fog could form, mainly along and near the coast. Given that guidance hasn't handle the fog very well over the past few days, the forecast features just patchy fog. Any fog that does develop will diminish quickly as winds turn offshore and drier low level air moves in. Temperatures will remain quite warm this evening, with most places holding in the mid to upper 60s. Cooler air will filter in late tonight, supporting lows in the low to mid 50s by sunrise Wednesday.

SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY/. Strong high pressure will build over the area from the northwest Wednesday, then shift east toward New England on Thursday. Much cooler air will move into the area with high temps only in the 50s both days.

A developing upper trough over the eastern United States late Thursday will bring several upper shortwaves through the area late Thursday through Friday. Meanwhile, an inverted trough will develop off the SC/GA coast, gradually developing into a closed low pressure system before moving up the coast late Friday. Moisture will begin to overspread the cool surface wedge late Thursday afternoon, potentially bringing a few showers to the area.

More significant moisture and forcing will affect the area late Thursday night through Friday evening, resulting in widespread showers. Given uncertainty in track of the low, temperature forecast is a bit tricky. Current forecast shows highs ranging from the mid 50s inland to low 60s at the coast.

LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/. Models are in decent agreement through the long term period. Low pressure and associated rainfall is expected to be exiting the area Friday night into Saturday. High pressure will return in its wake, with dry conditions expected for the latter half of the weekend and early next week. Temperatures will generally be above normal.

AVIATION /04Z WEDNESDAY THROUGH SUNDAY/. Prior to the 0Z TAFs, regional radar images indicated a fine line of showers, associated with a cold front, across the middle Carolinas southwest to the FL Panhandle, tracking east around 15 kts. Conditions at KCHS and KSAV should remain VFR ahead of the line. The line of showers is timed to reach the terminals late this evening. In the wake of the showers, ceilings should lower to MVFR, close to IFR levels. Based on MOS and forecast soundings, the restrictive ceilings are expected to remain until VFR conditions return during the mid-morning hours on Wednesday. Steady SW winds are forecast ahead of the front, veering from the NW by the pre-dawn hours, then turning from the NE by mid-morning.

Extended Aviation Outlook: Flight restrictions are likely Thursday night through Friday night as a low pressure system impacts the area. VFR is expected to return on Saturday.

MARINE. Tonight: Southerly winds will be in the 10-15 knot range this evening ahead of an approaching cold front. The front should move off the coast in the early morning hours and winds will shift around to northwesterly by sunrise Wednesday. Speeds will be increasing, but should generally be around 15 knots late tonight. Seas will average 3-5 feet. There is still a narrow window of time where sea/marine fog could develop this evening immediately ahead of the front. The forecast mentions patchy fog across the nearshore waters beginning late this evening.

Strong high pressure building in from the northwest will result in strengthening north to northeast winds Wednesday through Thursday, along with building seas. Solid Small Craft Advisory conditions are expected everywhere except Charleston Harbor starting at varying times Wednesday. An Advisory is likely for the Charleston Harbor at some point as well, however it appears winds will not reach criteria until Wednesday night, so have held off on issuing for now.

The worst conditions across the waters will occur late Wednesday night through Thursday, when gale-force gusts will be possible. Gale Watches and/or Warnings could be needed for at least portions of the waters. Conditions will improve on Friday, although advisories will persist as seas take a bit longer to subside.

Low pressure will pass over or near the waters late week into early weekend, followed by a return to high pressure. No additional concerns are expected at this time.

TIDES/COASTAL FLOODING. Elevated tide cycles are expected late week due to increasing astronomical influences with the full moon on Thursday and strong northeasterly winds. Minor to moderate coastal flooding will be possible with the morning high tides Thursday through Saturday. Coastal Flood Advisories could be required. Also of note, if significant rainfall occurs around the morning high tides Friday and Saturday, the potential for flooding of poor drainage areas could increase along the coast.

EQUIPMENT. KCLX will remain down until further notice.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . Small Craft Advisory from noon Wednesday to 4 PM EST Friday for AMZ352-354. Small Craft Advisory from 7 AM Wednesday to 4 PM EST Saturday for AMZ374. Small Craft Advisory from 7 AM Wednesday to 4 AM EST Saturday for AMZ350.

NEAR TERM . NED SHORT TERM . JRL LONG TERM . ETM AVIATION . NED MARINE . BSH/JRL TIDES/COASTAL FLOODING . EQUIPMENT .


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 0 mi56 min WSW 5.1 G 7 68°F 58°F1018.7 hPa (+0.8)
FBIS1 - Folly Island, SC 7 mi56 min W 7 G 9.9 65°F 1019 hPa (+0.7)65°F
41029 - Capers Nearshore (CAP 2) 16 mi108 min WSW 5.8 G 9.7 60°F 57°F1019.7 hPa
ACXS1 - ACE Basin Reserve, SC 32 mi71 min WSW 1 67°F 1019 hPa65°F
41033 43 mi48 min WSW 12 G 14 62°F 58°F1019.5 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 48 mi46 min 14 G 16 73°F1018 hPa

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
Last
24hr
SW11
G19
SW7
SW6
G9
SW5
G9
SW5
G8
SW6
G10
SW6
SW6
G10
SW7
G10
SW10
G14
SW8
G13
SW9
G16
S9
G15
SW9
G12
SW9
G14
SW9
G13
SW6
G10
SW5
G8
SW6
G11
SW5
G8
SW7
G10
SW6
G11
SW7
G15
SW4
G7
1 day
ago
NE5
NE5
G8
NE5
E7
NE7
G10
N4
NE4
NE4
NW4
N3
N2
S2
SE4
SE2
G5
SE7
E3
S4
SW4
SW6
SW7
SW7
G12
SW6
G10
SW7
G11
SW9
G12
2 days
ago
N11
G14
N12
G15
N11
N10
N10
N9
N5
G8
N8
G11
NW7
G11
N9
N9
G12
N6
N3
N4
N5
G8
NE7
NE6
N5
NE6
G9
NE6

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC7 mi61 minN 06.00 miFog/Mist66°F66°F100%1018.6 hPa
Charleston, Charleston Air Force Base, SC10 mi60 minWNW 38.00 miMostly Cloudy67°F64°F91%1018.1 hPa
Mount Pleasant Regional-Faison Field, SC11 mi61 minWSW 47.00 miMostly Cloudy68°F68°F100%1018.3 hPa

Link to 5 minute data for KCHS

Wind History from CHS (wind in knots)
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
12
AM
Last 24hrSW9SW9SW7SW9SW9SW7SW9SW9SW8SW8SW11SW18
G21
SW18SW12
G19
SW13S12S11S9S8S9SW9SW9W10W3
1 day agoNE3E4E5E4E4N3E3CalmE4CalmCalmE3S7S11
G14
S10SW11S10SW7SW8S9S10SW10S9SW9
2 days agoNE8NE9NE8NE9NE7NE7N6NE8NE9NE7N7NE10N8NE10N9NE7N5N5NE4NE5NE6E5N6NE5

Tide / Current Tables for Charleston, South Carolina
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Charleston
Click for Map
Wed -- 12:47 AM EST     -0.04 feet Low Tide
Wed -- 06:27 AM EST     Moonset
Wed -- 07:02 AM EST     6.03 feet High Tide
Wed -- 07:11 AM EST     Sunrise
Wed -- 01:25 PM EST     0.27 feet Low Tide
Wed -- 05:02 PM EST     Moonrise
Wed -- 05:13 PM EST     Sunset
Wed -- 07:21 PM EST     4.94 feet High Tide
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
0.2-00.61.93.54.85.765.74.83.62.210.30.41.22.53.64.54.94.84.23.11.8

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
   EDIT      (on/off)   Help   One Week of Data
Charleston Harbor Entrance
Click for Map
Wed -- 01:16 AM EST     0.00 knots Slack
Wed -- 03:52 AM EST     1.90 knots Max Flood
Wed -- 06:27 AM EST     Moonset
Wed -- 07:11 AM EST     Sunrise
Wed -- 07:41 AM EST     -0.00 knots Slack
Wed -- 10:53 AM EST     -2.57 knots Max Ebb
Wed -- 02:02 PM EST     0.00 knots Slack
Wed -- 04:15 PM EST     1.55 knots Max Flood
Wed -- 05:02 PM EST     Moonrise
Wed -- 05:13 PM EST     Sunset
Wed -- 07:46 PM EST     -0.00 knots Slack
Wed -- 11:01 PM EST     -2.35 knots Max Ebb
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
-1.3-0.30.81.61.91.61.30.7-0.4-1.5-2.3-2.6-2.1-1.1-011.51.410.6-0.2-1.2-2-2.3

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 (0,6,7,8)
      (on/off)   Help

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

Ad by Google

Cookie Policy:
This webiste uses cookies to save your settings. No personal information is saved. 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. I do not keep site logs longer than I need to to keep bad actors off the site. Basically, I delete them after looking at them. 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 numerious 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.