Marine Weather and Tides
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.
|Sunrise 7:10AM||Sunset 7:21PM||Thursday September 21, 2017 9:57 AM EDT (13:57 UTC)||Moonrise 7:26AM||Moonset 7:32PM||Illumination 1%|
EDIT (on/off)  Help
|AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 655 Am Edt Thu Sep 21 2017 |
Today..SW winds 5 kt, becoming S this afternoon. Seas 2 ft.
Tonight..SE winds 5 kt. Seas 2 ft.
Fri..NE winds 5 to 10 kt. Seas 2 to 3 ft, building to 3 to 4 ft in the afternoon. A slight chance of showers and tstms in the afternoon.
Fri night..E winds 10 kt. Seas 4 to 5 ft, building to 4 to 6 ft after midnight. A slight chance of showers and tstms.
Sat..NE winds 10 to 15 kt. Seas 4 to 6 ft. A slight chance of showers.
Sat night..NE winds 10 to 15 kt. Seas 5 to 7 ft. A slight chance of showers in the evening.
Sun..NE winds 10 to 15 kt. Seas 5 to 7 ft.
Sun night..NE winds 10 to 15 kt. Seas 5 to 7 ft.
Mon..N winds 5 to 10 kt. Seas 5 to 7 ft.
Mon night..N winds 5 to 10 kt. Seas 4 to 6 ft. Mariners are reminded that winds and seas higher in and near tstms.
|AMZ300 655 Am Edt Thu Sep 21 2017 |
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail through this weekend. The high will weaken and shift inland as hurricane maria tracks northward off the southeast u.s. Coast through the first half of next week.
7 Day Forecast for Marine Location Near Hilton Head Island, SCHourly EDIT Help
Area Discussion for - Charleston, SC  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus62 kchs 211113|
area forecast discussion
national weather service charleston sc
713 am edt Thu sep 21 2017
High pressure will prevail through this weekend. The high will
weaken and shift inland as hurricane maria tracks northward off
the southeast u.S. Coast through the first half of next week.
Near term through tonight
Today: a very weak surface pressure pattern will persist across
the forecast area. An upper level trough axis extends through
ga and the carolinas while pwats look to be more elevated across
our ga zones nearing convective initiation this afternoon. The
00z NAM bears this out with a narrow slot of drier 850-500 mb
rhs north of i-16 into southeast sc during the afternoon hours.
With low-level convergence again quite weak during the sea
breeze oscillation period, we have minimal pops but did maintain
low-end chance pops in our coastal half southern zones of
southeast ga. Isolated showers and tstms possible along the sc
sea breeze. It will be another warm day with highs just a degree
or two Wednesday's highs.
Tonight: a few of the high resolution models suggest isolated
evening convection could linger along a sagging mid level
trough axis across our far northern zones around the santee
cooper lakes. With the loss of diurnal heating and warm mid
level temps, we only hung onto 20 pops prior to midnight while
suspecting models could be overdone. We also opted for patchy
fog mentions across northwest zones late tonight where various
guidance progs suggest the higher chances.
Short term Friday through Sunday
Weak upper troughing and some increased moisture will persist
across the area Friday into Saturday and this along with a
fairly weak sea breeze will support a few showers and
thunderstorms, mainly in the afternoon on Friday and just in ga
on Saturday. Building high pressure from the north later
Saturday and Sunday should keep things dry this period.
Temperatures will stay above normal, generally upper 80s during
the day and around 70 at night.
Long term Sunday night through Wednesday
Inland high pressure will persist through early next week while
confidence is increasing that hurricane maria will remain offshore
of the southeast u.S. Coast as it tracks north through the middle of
next week. Some showers could skirt coastal areas early next week as
maria passes by but otherwise mainly dry conditions are anticipated.
Temperatures look to stay above normal.
Aviation 12z Thursday through Monday
Mainly shallow ground fog along the coastal corridor early this
morning, most noticeable at kchs. Otherwise, conditions will be
vfr today and into tonight. Chances for convection at the|
terminals still looks low-end at mid afternoon along the sea
breeze. The potential for fog exists again late tonight, mainly
after 06z through daybreak on Friday.
Extended aviation outlook: low probability for brief flight
restrictions in early morning fog and or low clouds Saturday morning
and in mainly afternoon showers thunderstorms Friday at kchs ksav
and at ksav Saturday.
Through tonight, relatively tranquil conditions with winds variable
at times as high pressure to the north eventually turning synoptic
flow onshore by early Friday. Wind speeds will be below 15 kt
with seas 2-3 ft, mainly in long period swell.
Thursday through Monday: no significant concerns before swells from
hurricane maria nearing the southeast bahamas later this week begin
to impact the waters Thursday night or Friday. Advisories will be
likely for the offshore waters starting Friday and the nearshore
waters starting Friday night. Seas could build to 10 feet or more
near the gulf stream Saturday night and persist in Monday, although
much depends on the exact track strength of hurricane maria.
Rip currents: astronomical influences and a lingering long
period ground swell component will support a low-end moderate
rip current risk at area beaches today. Swell from offshore
hurricane maria will create more significant rip current risks
this weekend into the middle of next week.
Tides coastal flooding
On this morning's high tide cycle, some shallow coastal flooding
is possible around downtown charleston but for now, we have
held off on a coastal flood advisory for levels reaching very
close to 7.0 feet mllw.
Powerful surf created by offshore hurricane maria will drive
significant wave run-up, which could cause further beach erosion
this weekend into early next week. Also, the potential for
shallow salt water flooding will persist through early next week
around the times of high tide, particularly along the sc coast.
Chs watches warnings advisories
short term... Rjb
long term... Rjb
tides coastal flooding...
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|
|FPKG1 - 8670870 - Fort Pulaski, GA||15 mi||58 min||W 1.9 G 2.9||78°F||80°F||1018.1 hPa (+1.7)|
|41033||20 mi||50 min||W 1.9 G 3.9||79°F||1026.6 hPa|
|ACXS1 - ACE Basin Reserve, SC||29 mi||73 min||Calm||76°F||1018 hPa||76°F|
|FBIS1 - Folly Island, SC||57 mi||58 min||WNW 1.9 G 4.1||79°F||1018.1 hPa (+1.4)||76°F|
Wind History for Fort Pulaski, GA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Hilton Head Island, Hilton Head Airport, SC||4 mi||68 min||SSW 5||10.00 mi||Clear||79°F||77°F||94%||1017.9 hPa|
|Beaufort County Airport, SC||15 mi||63 min||N 0||5.00 mi||Fog/Mist||77°F||73°F||89%||1017.6 hPa|
|Beaufort, Marine Corps Air Station, SC||18 mi||62 min||N 0||7.00 mi||A Few Clouds||79°F||77°F||94%||1017.6 hPa|
|Savannah-Hilton Head International Airport, GA||23 mi||65 min||S 3||8.00 mi||Partly Cloudy||77°F||73°F||90%||1017.8 hPa|
|Hunter U. S. Army Airfield, GA||24 mi||2 hrs||N 0||8.00 mi||Fair||72°F||70°F||97%||1016.9 hPa|
Wind History from HXD (wind in knots)
|1 day ago||W||N|
|2 days ago||N||N||N||N||N||N||N||N||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||NW |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Skull Creek |
Click for Map
Thu -- 03:55 AM EDT -0.03 feet Low Tide
Thu -- 07:10 AM EDT Sunrise
Thu -- 08:25 AM EDT Moonrise
Thu -- 10:08 AM EDT 8.48 feet High Tide
Thu -- 04:20 PM EDT 0.02 feet Low Tide
Thu -- 07:20 PM EDT Sunset
Thu -- 08:31 PM EDT Moonset
Thu -- 10:21 PM EDT 8.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Savannah River Entrance |
Click for Map
Thu -- 01:55 AM EDT -2.33 knots Max Ebb
Thu -- 04:28 AM EDT 0.01 knots Slack
Thu -- 07:06 AM EDT 2.24 knots Max Flood
Thu -- 07:11 AM EDT Sunrise
Thu -- 08:25 AM EDT Moonrise
Thu -- 10:51 AM EDT -0.00 knots Slack
Thu -- 02:25 PM EDT -2.50 knots Max Ebb
Thu -- 04:58 PM EDT 0.00 knots Slack
Thu -- 07:21 PM EDT Sunset
Thu -- 07:30 PM EDT 2.26 knots Max Flood
Thu -- 08:32 PM EDT Moonset
Thu -- 11:07 PM EDT -0.00 knots Slack
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 (9,2,3,4)(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.