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Marine Weather and Tides
Version 3.4 |
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 7:14AM | Sunset 7:15PM | Tuesday September 26, 2017 2:03 PM EDT (18:03 UTC) | Moonrise 12:01PM | Moonset 10:43PM | Illumination 35% |  |
Marine Forecasts
EDIT (on/off) Help| AMZ354 Waters From Savannah Ga To Altamaha Sound Ga Out 20 Nm...including Grays Reef National Marine Sanctuary- 1232 Pm Edt Tue Sep 26 2017 This afternoon..NW winds 10 kt. Seas 3 to 5 ft. Tonight..NW winds 5 to 10 kt. Seas 2 to 4 ft. Wed..W winds 5 to 10 kt. Seas 2 ft. Wed night..W winds 5 to 10 kt. Seas 2 ft. Thu..W winds 5 to 10 kt, becoming sw in the afternoon. Seas 1 to 2 ft. Thu night..S winds 5 to 10 kt, becoming sw after midnight. Seas 1 foot. Fri..NE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms. Fri night..SE winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. Sat..NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers and tstms. Sat night..NE winds 15 to 20 kt. Seas 4 to 6 ft. A chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms. | AMZ300 1232 Pm Edt Tue Sep 26 2017 Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Hurricane maria will track northward off the southeast u.s. Coast through midweek before turning east-northeast and away from the coast into late week. A cold front will move through the area by early this weekend, followed by high pressure into early next week. |
7 Day Forecast for Marine Location Near Thunderbolt, GA
Hourly EDIT Helplocation: 32.04, -81.04 debug
Area Discussion for - Charleston, SC
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus62 kchs 261636 afdchs area forecast discussion national weather service charleston sc 1236 pm edt Tue sep 26 2017 Synopsis Hurricane maria will track northward off the southeast u.S. Coast through midweek before turning east-northeast and away from the coast into late week. A cold front will move through the area by early this weekend, followed by high pressure into early next week. Near term until 6 pm this evening A warm, downslope flow will dominate this afternoon as the broad, cyclonic circulation around hurricane marine impacts the region. Cumulus developing across southeast georgia should mix out over the next few hours while occasional bands of stratocumulus rotate into the charleston tri-county area. No major changes were made for the early afternoon update. Short term 6 pm this evening through Friday Tonight: maria will continue her motion northward to a position to the E of CAPE hatteras by morning. The environment locally remains warm and dry, with only a little wrap-around cirrus and or altocumulus to occur around the tropical cyclone across our sc zones. Light or calm winds away from the immediate coast will result in decent radiational cooling to get temps down into the upper 60s and lower 70s. This is still a good 5-7f above late september normals. Wednesday through Friday: dry conditions are expected to continue through Thursday as maria moves away from the area. A warming trend with above normal temperatures will persist, with most locations reaching lower 90s Wednesday and Thursday. A cold front near the area Thursday should complete passage through the forecast area by late Friday or early Saturday, bringing slightly increased shower thunderstorm chances. Temperatures Friday should peak in the upper 80s most locations with some locations nearing 90 in southwestern zones, but uncertainty in cloud cover and precipitation placement timing remains. Low temperatures will range from the upper 60s to lower 70s through the period. Long term Friday night through Monday High surface pressure will begin filling back into the area later Friday into the weekend behind the departing cold front. Elevated probabilities for precipitation will linger behind frontal passage as a sharpening upper level trough crosses the forecast area Saturday. Ridging aloft will follow this feature and a weak high pressure wedge-type pattern could set up near or just inland from the area later Saturday into Sunday and persist into early next |
week. Aviation 18z Tuesday through Sunday Primary concerns: * none vfr through the period for both kchs and ksav. Extended aviation outlook: mainlyVFR conditions are expected, with low probabilities for morning restrictions due to fog, mainly Wednesday and Thursday. Marine Today and tonight: the large cyclonic pressure pattern surrounding TC maria will prevail across the maritime community. Since we're so far away to the W and sw, winds won't be a problem, but elevated seas comprised mostly of large and long period swells will persist. As a result we still have sca's in effect for charleston county atlantic waters and the outer ga waters, with significant wave heights as high as 6 ft within 20 nm, and up to 8 ft further offshore. However, as maria gains some latitude, seas will slowly continue to subside this afternoon and tonight, and the only SCA remaining by sunset will be on the amz374 waters for 6 or 7 foot seas. The other waters will have nothing more than 4 or 5 ft by that time. Wednesday through Sunday: lingering 6 foot seas in the offshore ga waters should drop below small craft advisory criteria by mid-day Wednesday. Conditions will then remain rather tranquil through late week with winds peaking 10-15 knots and seas generally ranging 2-4 feet. NE winds will begin increasing early Saturday in response to a tightening pressure gradient, peaking around 20 knots with gusts to 25 knots, and seas increasing in response. Small craft advisory conditions will be possible again by Saturday afternoon and could persist into early next week. Rip currents: there remains a solid 3 or 4 foot swell impacting the beaches today, arriving around every 12 seconds. This is more than enough to generate a moderate risk of rip currents. With a strong pinching of winds and the resulting increase in seas this weekend, another round of enhanced rip current risk seems likely. Chs watches warnings advisories Ga... None. Sc... None. Marine... Small craft advisory until 4 pm edt Wednesday for amz374. Small craft advisory until 5 pm edt this afternoon for amz350. |
Weather Reporting Stations
EDIT (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 | 7 mi | 46 min | N 7 G 12 | 83°F | 81°F | 1012.5 hPa | ||
| 41033 | 37 mi | 56 min | NNW 5.8 G 9.7 | 82°F | 1019 hPa | |||
| SAXG1 - Sapelo Island Reserve, GA | 45 mi | 64 min | Calm | 85°F | 1013 hPa (-1.0) | 72°F | ||
| 41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA | 45 mi | 74 min | NNW 9.7 G 14 | 79°F | 81°F | 4 ft | 1012.4 hPa (-0.5) | 69°F |
| ACXS1 - ACE Basin Reserve, SC | 47 mi | 79 min | NNW 1.9 | 86°F | 1012 hPa | 73°F |
Wind History for Fort Pulaski, GA
(wind in knots) EDIT (on/off) Help| 2 PM | -12 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 | 12 PM | 1 PM | |
| Last 24hr | NE | NE | NE G11 | NE G11 | NE | NE G8 | NE | NE | NE | NW | N | N | NW | NW | N | NW | NW | N | N | N | N G14 | NW | N | |
| 1 day ago | E | E G16 | E | E | E | NE | NE | NE | NE | NE | NW | NW | N | NW | N | N | NW | N | N | N | NE G15 | N | N | NE |
| 2 days ago | E | E G18 | NE G17 | E | E G17 | E | E | E | E G14 | E | E | E | E | NE | NE | NE G7 | N | NE | N | NE | NE G15 | NE G13 | NE G15 | NE G14 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Hunter U. S. Army Airfield, GA | 6 mi | 2.1 hrs | NW 9 | 10.00 mi | Fair | 85°F | 68°F | 58% | 1012.8 hPa |
| Savannah-Hilton Head International Airport, GA | 11 mi | 71 min | N 9 | 10.00 mi | A Few Clouds | 89°F | 69°F | 52% | 1012.7 hPa |
| Hilton Head Island, Hilton Head Airport, SC | 22 mi | 74 min | NNW 8 | 10.00 mi | Clear | 86°F | 69°F | 59% | 1012.5 hPa |
Wind History from SVN (wind in knots)
| 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 | 12 PM | 1 PM | |
| Last 24hr | N | N | N | N | N | NE | NE | NE | NE | Calm | Calm | W | NW | NW | NW | W | W | W | N | N | N | NW | NW | NW |
| 1 day ago | NE | N | N | NE | NE | NE | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | N | Calm | N | N | N | N | N | N |
| 2 days ago | E | NE G20 | E G20 | NE | E | E | E | NE | NE | Calm | Calm | Calm | Calm | Calm | N | NW | N | NE | N | NE | NE | E | NE | NE |
Tide / Current Tables for Thunderbolt, Wilmington River, Georgia
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Thunderbolt Click for Map Tue -- 01:17 AM EDT 7.67 feet High Tide Tue -- 06:58 AM EDT 1.53 feet Low Tide Tue -- 07:15 AM EDT Sunrise Tue -- 01:00 PM EDT Moonrise Tue -- 01:52 PM EDT 8.14 feet High Tide Tue -- 07:15 PM EDT Sunset Tue -- 07:45 PM EDT 1.92 feet Low Tide Tue -- 11:43 PM EDT Moonset Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 7.1 | 7.6 | 7.4 | 6.4 | 4.9 | 3.3 | 2 | 1.5 | 2 | 3.1 | 4.5 | 6 | 7.1 | 7.9 | 8.1 | 7.6 | 6.4 | 4.9 | 3.3 | 2.2 | 1.9 | 2.5 | 3.6 | 4.9 |
Tide / Current Tables for Savannah River Entrance, Georgia Current
EDIT (on/off) Help One Week of Data| Savannah River Entrance Click for Map Tue -- 01:53 AM EDT -0.00 knots Slack Tue -- 04:27 AM EDT -1.50 knots Max Ebb Tue -- 07:14 AM EDT Sunrise Tue -- 07:57 AM EDT 0.00 knots Slack Tue -- 10:32 AM EDT 1.70 knots Max Flood Tue -- 01:00 PM EDT Moonrise Tue -- 02:32 PM EDT -0.00 knots Slack Tue -- 05:46 PM EDT -1.53 knots Max Ebb Tue -- 07:14 PM EDT Sunset Tue -- 08:45 PM EDT 0.00 knots Slack Tue -- 11:07 PM EDT 1.52 knots Max Flood Tue -- 11:42 PM EDT Moonset Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 1.1 | 0.6 | -0.1 | -1 | -1.5 | -1.5 | -1.3 | -0.8 | 0 | 1 | 1.6 | 1.6 | 1.3 | 0.9 | 0.4 | -0.4 | -1.2 | -1.5 | -1.5 | -1.4 | -0.7 | 0.3 | 1.1 | 1.5 |
Weather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of Southeast EDIT  |
Wind Forecast for Charleston, SC (14,3,4,5)
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Ground Weather Radar Station Charleston, SC
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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 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. |