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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 6:32AM | Sunset 8:28PM | Sunday July 23, 2017 2:57 AM EDT (06:57 UTC) | Moonrise 5:45AM | Moonset 7:46PM | Illumination 0% |  |
Marine Forecasts
EDIT (on/off) Help| AMZ354 Waters From Savannah Ga To Altamaha Sound Ga Out 20 Nm...including Grays Reef National Marine Sanctuary- 1222 Am Edt Sun Jul 23 2017 Tonight..SW winds 15 to 20 kt, diminishing to 10 to 15 kt late. Seas 3 ft. Sun..SW winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. Sun night..SW winds 10 to 15 kt. Seas 3 ft. A slight chance of showers and tstms. Mon..SW winds 10 to 15 kt. Seas 2 to 3 ft, building to 3 to 4 ft in the afternoon. A slight chance of showers and tstms in the morning, then a chance of showers and tstms in the afternoon. Mon night..SW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft after midnight. A chance of showers and tstms. Tue..SW winds 10 to 15 kt. Seas 2 ft. A chance of showers and tstms. Tue night..S winds 10 to 15 kt, becoming sw 5 to 10 kt after midnight. Seas 2 to 3 ft. A chance of showers and tstms. Wed..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. Wed night..SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. Thu..SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. Thu night..SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms. | AMZ300 1222 Am Edt Sun Jul 23 2017 Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Atlantic high pressure will continue to extend west into the southeast coast this weekend. A weak cold front will approach the area during the middle of next week. Low pressure should then develop over the area and linger through late 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 230527 afdchs area forecast discussion national weather service charleston sc 127 am edt Sun jul 23 2017 Synopsis Atlantic high pressure will continue to extend west into the southeast coast this weekend. A weak cold front will approach the area during the middle of next week. Low pressure should then develop over the area and linger through late week. Near term until 6 am this morning Skies will be mostly clear overnight with dry weather expected. Other than a little ground fog in locations where it rained on Saturday, there is likely too much mixing and unfavorable condensation pressure deficits for anything more to occur by daybreak Sunday. It'll be warm and humid, with lows lower or middle 70s far inland, closer to 80 on the barrier islands and in downtown charleston. Short term 6 am this morning through Tuesday Sunday, the mid level pattern over the region will feature a broad weakness, with a large ridge centered over the atlantic and another ridge centered over the red river valley. However, low pressure is expected to develop across the mid atlantic states, with the trough remaining across the carolina foothills and piedmont. The pressure gradient across the forecast area will slowly steepen through the day, with gusty conditions expected across the marine zones and near the coast. Forecast soundings indicate that the LFC will range between 4-5 kft, with shallow CIN lingering into the late afternoon. A slight increase in llvl moisture convergence should support scattered thunderstorms inland, with slight chcs generally east of i- 95. Maximum temperatures should reach around 90 over the beaches to the mid 90s across inland ga. Monday, nam12 shows a mid level low and sfc low passing north of the coastal zones during the morning hours. This feature appears much weaker on the other short range models, I will favor the gfs. Using a blend of temperature guidance, high temperatures are forecast to range a degree or two below values reached sun. Dewpoints are expected to remain in the low to mid 70s as a sfc trough remains west of the region. Given the temperatures and dewpoints, any cin should erode during the late afternoon hours. Short range guidance indicates that a weak short wave is expected to ripple across the forecast area during the late afternoon. Pops should range from 40 percent over ga and around 30 near the coast and coastal waters. Tuesday, the 12z GFS indicates that the axis of deep moisture will shift across the CWA during the daylight hours. Pw values are forecast to increase to around 2.3 inches. Features across the forecast area will remain limited to broad mid level trough with low pressure across the southern appalachian mountains. Provided generally weak forcing and tall and thin instability, I will keep pops limited to high chc. Long term Tuesday night through Saturday An unsettled weather pattern will persist through mid week while southwest flow advects deep moisture to the region ahead of a cold front approaching from the north northwest. The cold front should struggle to push south into the region, likely stalling just north of the area as its parent mid upper lvl trough of low pressure |
shifts off the northeast coast. However, weak low pressure should develop near the stalled boundary on Wednesday and persist through late week until a second mid upper lvl trough shifts over the northeast and gradually amplifies, forcing some mid-lvl energy over the mid atlantic and southeast states late week. The pattern suggests at least chances of showers and thunderstorms each day with greatest coverage occurring during peak diurnal heating hours. Temps will generally peak around normal mid week, but could approach the mid 90s by the upcoming weekend. Overnight lows will range in the mid 70s. Aviation 06z Sunday through Thursday MainlyVFR through 06z Monday. However, there is at least some chance that shra tsra could impact kchs and or ksav on Sunday, with a risk of temporary flight restrictions. At this point, still enough uncertainty to include vcts cb, models showing ksav may stand a better chance than kchs given it's vcnty to deeper moisture. Extended aviation outlook: afternoon showers thunderstorms could provide brief flight restrictions each day. However, greatest chances of flight restrictions should occur on Wednesday as a cold front stalls just north of the area. Otherwise,VFR conditions will prevail. Marine Overnight: SW winds will be as high as 15 or 20 kt, before dropping off some late as weak land breeze circulations develop. Seas will average 3 or 4 ft. Sunday through Thursday, broad high pressure will remain across the western atlantic as low pressure remain inland. Low pressure may deepen across the mid atlantic states late Sunday into Monday. A steeper pressure gradient should support gusty SW winds Sunday and Monday afternoon and evening, gusts may near 25 kts. Conditions are expected to remain below small craft advisory criteria. Low pressure will gradually settle over the southern appalachians Monday and Tuesday, shifting over the ga sc coastal waters by late Wednesday. Winds should weaken and shift from the se. Thunderstorm coverage is forecast to increase each day through Wednesday. Tides coastal flooding Tides will remain elevated into early next week due to the lunar perigee and new moon. Additional coastal flooding advisories are likely. Chs watches warnings advisories Ga... None. Sc... None. Marine... None. Near term... short term... Ned long term... Dpb aviation... marine... tides coastal flooding... |
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 | W 4.1 G 6 | 78°F | 86°F | 1015 hPa | ||
| 41033 | 37 mi | 50 min | WSW 16 G 21 | 82°F | 85°F | 1014.3 hPa | ||
| SAXG1 - Sapelo Island Reserve, GA | 45 mi | 58 min | SW 9.9 | 78°F | 1015 hPa (-1.0) | 76°F | ||
| 41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA | 45 mi | 68 min | SW 16 G 18 | 80°F | 81°F | 3 ft | 1015.3 hPa (-0.3) | 75°F |
| ACXS1 - ACE Basin Reserve, SC | 47 mi | 73 min | Calm | 80°F | 1014 hPa | 77°F |
Wind History for Fort Pulaski, GA
(wind in knots) EDIT (on/off) Help| 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 | 1 AM | 2 AM | |
| Last 24hr | SW | SW | NW | NW | W | W | NW | W | NW | E | SW | S G9 | SE G9 | S G14 | S G13 | S G15 | SW G18 | SW G17 | SW G10 | SW G10 | SW G13 | SW G14 | SW G10 | W |
| 1 day ago | NW | W | W | W | W | NW | SW | SW | S G11 | S G10 | SW | S G10 | S G12 | S G9 | S G12 | S G12 | S G11 | S G11 | SW G13 | SW | SW G8 | SW | S | NW |
| 2 days ago | W | W | W | W | SW | N | -- | E | SE G10 | S | S G12 | W G10 | SW G9 | W | S | S | S G6 | SW G12 | SW | W | W | W |
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 | 60 min | WSW 3 | 8.00 mi | Fair | 77°F | 73°F | 89% | 1014.5 hPa |
| Savannah-Hilton Head International Airport, GA | 11 mi | 65 min | SW 6 | 10.00 mi | Fair | 0°F | 0°F | % | 1015.2 hPa |
| Hilton Head Island, Hilton Head Airport, SC | 22 mi | 63 min | SW 8 | 10.00 mi | Fair | 81°F | 75°F | 84% | 1015.2 hPa |
Wind History from SVN (wind in knots)
| 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 | 1 AM | 2 AM | |
| Last 24hr | SW | SW | Calm | Calm | Calm | SW | W | SW | W | NW | S | SW | W | S | SE | S | S G18 | SW | SW | SW | ||||
| 1 day ago | Calm | W | Calm | Calm | Calm | Calm | SW | SW | SE | S | W | SE | S | S | S | SE | S | S | S | SW | S | S | W | N |
| 2 days ago | Calm | Calm | Calm | Calm | Calm | Calm | W | W | W | NW | N | SE G16 | Calm | Calm | Calm | Calm | Calm | S | SW | SW | S | Calm | Calm | W |
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 Sun -- 02:57 AM EDT -0.76 feet Low Tide Sun -- 05:47 AM EDT New Moon Sun -- 06:33 AM EDT Sunrise Sun -- 06:45 AM EDT Moonrise Sun -- 09:07 AM EDT 8.47 feet High Tide Sun -- 03:09 PM EDT -1.28 feet Low Tide Sun -- 08:27 PM EDT Sunset Sun -- 08:46 PM EDT Moonset Sun -- 09:32 PM EDT 10.03 feet High Tide 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 |
| 4.7 | 2.1 | 0 | -0.8 | -0 | 1.8 | 4.1 | 6.3 | 7.8 | 8.5 | 8 | 6.6 | 4.5 | 2.1 | -0.2 | -1.3 | -0.7 | 1.2 | 3.8 | 6.6 | 8.7 | 9.9 | 9.9 | 8.8 |
Tide / Current Tables for Savannah River Entrance, Georgia Current
EDIT (on/off) Help One Week of Data| Savannah River Entrance Click for Map Sun -- 01:00 AM EDT -2.59 knots Max Ebb Sun -- 03:45 AM EDT 0.01 knots Slack Sun -- 05:47 AM EDT New Moon Sun -- 06:15 AM EDT 2.05 knots Max Flood Sun -- 06:32 AM EDT Sunrise Sun -- 06:44 AM EDT Moonrise Sun -- 09:52 AM EDT -0.00 knots Slack Sun -- 01:18 PM EDT -2.39 knots Max Ebb Sun -- 03:50 PM EDT 0.00 knots Slack Sun -- 06:35 PM EDT 2.75 knots Max Flood Sun -- 08:26 PM EDT Sunset Sun -- 08:45 PM EDT Moonset Sun -- 10:21 PM EDT -0.00 knots Slack 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 |
| -2.4 | -2.6 | -2.2 | -1.1 | 0.4 | 1.5 | 2 | 1.9 | 1.6 | 0.9 | -0.2 | -1.3 | -2 | -2.4 | -2.2 | -1.3 | 0.3 | 1.8 | 2.6 | 2.7 | 2.3 | 1.6 | 0.5 | -0.9 |
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 (2,6,7,8)
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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. |