Marine Weather and Tides
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.
|Sunrise 7:11AM||Sunset 7:38PM||Monday March 27, 2017 8:31 PM EDT (00:31 UTC)||Moonrise 6:05AM||Moonset 6:21PM||Illumination 0%|
EDIT (on/off)  Help
|AMZ330 Charleston Harbor- 741 Pm Edt Mon Mar 27 2017 |
Tonight..S winds 5 to 10 kt.
Tue..SW winds 5 to 10 kt...increasing to 15 kt in the afternoon. A slight chance of showers and tstms in the morning.
Tue night..SW winds 15 kt...diminishing to 5 kt after midnight.
Wed..NW winds 5 kt...becoming ne in the afternoon.
Wed night..E winds 5 to 10 kt.
Thu..E winds 5 to 10 kt.
Thu night..SE winds 10 kt. A chance of showers and tstms.
Fri..S winds 10 to 15 kt. Showers and tstms likely.
Fri night..SW winds 10 to 15 kt. A chance of showers with a slight chance of tstms.
Sat..W winds 5 to 10 kt.
Sat night..NW winds around 5 kt. Mariners are reminded that winds and waves can be higher in and near tstms. Unless otherwise noted...waves 1 foot or less. Charleston harbor water temperature...63 degrees.
|AMZ300 741 Pm Edt Mon Mar 27 2017 |
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Atlantic high pressure will weaken through Tuesday. A weak cold front will stall over or near the area on Wednesday. Another cold front will move through Friday night into Saturday followed by drier high pressure Sunday.
7 Day Forecast for Marine Location Near Meggett, SCHourly EDIT Help
Area Discussion for - Charleston, SC  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus62 kchs 272354|
area forecast discussion
national weather service charleston sc
754 pm edt Mon mar 27 2017
Atlantic high pressure will weaken through Tuesday. A weak cold
front will stall over or near the area on Wednesday. Another
cold front will move through Friday night into Saturday followed
by drier high pressure Sunday.
Near term /until 6 am Tuesday morning/
Early this evening: showers and thunderstorms have come to an
end with the loss of diurnal heating. A few showers continue to
develop back to the west and southwest, ahead of an approaching
mid-level shortwave. This feature is currently making its way
across alabama and into georgia where it is helping to drive
much deeper and more significant convection. This will be the
main forecast issue overnight, tracking this shortwave as it
progresses eastward and whether it is able to kick off isolated
noctural convection across the forecast area. Models do show the
shortwave weakening a bit, but virtually ever available model
shows some degree of convection moving along a region near where
the lowcountry and midlands meet. Coverage should be limited
thanks to the lack of surface based instability, but there
should be enough elevated instability to generate at least
isolated showers. Have kept thunder in the forecast as mid-level
lapse rates steepen. Potential for fog appears to be on the low
end thanks to enough flow in the low levels just off the
surface. Another mild night with lows only falling to around 60
for most areas.
Short term /6 am Tuesday morning through Thursday/
The upper shortwave will be moving off the sc coast by early
Tuesday afternoon, taking with it the best chance for showers
and tstms. We maintained a slight chance for precip across far
northern areas where the better forcing will exist.
The upper ridge will expand to the east on Wednesday while a
weak back door cold front drops in from the north. Despite a
weak northerly surface flow developing, downslope component
aloft and large-scale warm air advection should result in warm
temperatures in the mid/upper 80s.
The upper ridge will hang on into Thursday though some
shortwave energy lifting out of the central gulf will yield
increasing isentropic ascent across the stalled front. Scattered
showers will be possible over the central and southern areas,
with thunderstorms possible farther to the south where a bit
more surface-based instability develops.
Long term /Thursday night through Monday/
The stalled front across ga is expected to shift north as a
warm front Thursday night into Friday followed by a cold frontal
passage Saturday. Drier high pressure looks to then return
later in the weekend before more unsettled weather possibly
moves back into the area for next Monday. Showers and
thunderstorms will be possible through Friday night, although
the best chances and heaviest amounts are likely through Friday
morning. Temperatures should remain above normal through the|
Aviation /00z Tuesday through Saturday/
Vfr conditions are expected to prevail through 00z Wednesday. We
will likely see isolated showers develop after midnight tonight
and approach kchs. Chances of direct impacts are too low to
include in the forecast. Fog/stratus concerns are low tonight.
Then for Tuesday, another round of mainly isolated showers and
thunderstorms. No direct impacts expected at the terminals, but
if there is a chance it would be highest at kchs.
Extended aviation outlook: low ceilings possible Wed night
through Thu night as a front stalls over the area. Brief flight
restrictions possible in showers and tstms Thu night through fri
Tonight: southerly flow regime will persist overnight the area
will remain situated between high pressure well offshore and a
cold front to the west. Speeds will remain 10 kt or less with
seas 2-4 ft nearshore waters and 4-5 ft georgia offshore waters.
Tuesday through Saturday: strengthening east to southeast flow
Thursday into Friday will result in increasing seas, with 6
footers reaching the gulf stream by Thursday night. At least 6
ft seas expected over all coastal marine zones on Friday,
gradually subsiding Friday night into Saturday as the surface
high shifts east. Small craft advisories appear likely for much
of the area during this time.
Rip currents: 3 ft 10 sec swell, increasing onshore winds and
astronomical influences will yield a high risk for rip currents
along the sc coast and moderate for ga on Tuesday. The swell
will be decreasing on Wednesday though the risk will likely
remain elevated at least until then.
High tides could reach advisory levels, mainly late
Wednesday/Thursday, due to strengthening onshore winds and
swells impacting the coast. This could cause shallow saltwater
inundation in typically vulnerable coastal areas, especially in
Sc... High risk for rip currents from Tuesday morning through
Tuesday evening for scz048>051.
Near term... Bsh
short term... Jrl
long term... Rjb
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|ACXS1 - ACE Basin Reserve, SC||13 mi||106 min||SSE 2.9||70°F||1017 hPa||61°F|
|CHTS1||20 mi||43 min||S 6 G 8||68°F||63°F||1017 hPa|
|FBIS1 - Folly Island, SC||21 mi||31 min||S 8 G 8||66°F||1017.4 hPa (-0.8)||63°F|
|41033||30 mi||83 min||S 7.8 G 9.7||64°F||64°F||1016.2 hPa|
|41029 - Capers Nearshore (CAP 2)||35 mi||83 min||S 5.8 G 7.8||66°F||1016.9 hPa|
|FPKG1 - 8670870 - Fort Pulaski, GA||57 mi||43 min||SSE 6 G 9.9||67°F||64°F||1016.6 hPa|
Wind History for Charleston, SC(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Charleston Executive Airport, SC||15 mi||36 min||S 6||10.00 mi||Fair||66°F||60°F||83%||1016.9 hPa|
|Charleston, Charleston Air Force Base, SC||20 mi||35 min||SSW 8||10.00 mi||Mostly Cloudy||68°F||57°F||68%||1016.6 hPa|
|Walterboro Lowcountry Regional Airport, SC||24 mi||36 min||SSE 7||10.00 mi||Fair||68°F||59°F||73%||1016.6 hPa|
Wind History from JZI (wind in knots)
|1 day ago||Calm||Calm||Calm||Calm||Calm||Calm||Calm||SE||Calm||Calm||Calm||Calm||Calm||SE||SE||SE||S||S||S||S||SE|
|2 days ago||E||Calm||Calm||Calm||Calm||Calm||Calm||Calm||SE||SE||SE||Calm||Calm||SE||E||E||E||E||SE||E||SE||SE||E||E |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Lower Toogoodoo Creek |
Click for Map
Mon -- 02:52 AM EDT -0.54 feet Low Tide
Mon -- 07:05 AM EDT Moonrise
Mon -- 07:15 AM EDT Sunrise
Mon -- 09:42 AM EDT 7.52 feet High Tide
Mon -- 03:16 PM EDT -0.68 feet Low Tide
Mon -- 07:21 PM EDT Moonset
Mon -- 07:37 PM EDT Sunset
Mon -- 09:59 PM EDT 7.82 feet High Tide
Mon -- 10:59 PM EDT New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Charleston Harbor Entrance |
Click for Map
Mon -- 02:37 AM EDT 0.00 knots Slack
Mon -- 05:07 AM EDT 1.98 knots Max Flood
Mon -- 07:03 AM EDT Moonrise
Mon -- 07:13 AM EDT Sunrise
Mon -- 08:52 AM EDT -0.01 knots Slack
Mon -- 12:02 PM EDT -2.90 knots Max Ebb
Mon -- 02:59 PM EDT 0.00 knots Slack
Mon -- 05:28 PM EDT 2.13 knots Max Flood
Mon -- 07:19 PM EDT Moonset
Mon -- 07:36 PM EDT Sunset
Mon -- 09:09 PM EDT -0.01 knots Slack
Mon -- 10:59 PM EDT New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Southeast EDIT
Wind Forecast for Charleston, SC (20,4,5,8)(on/off)  Help
Ad by Google
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.