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Marine Weather and Tides
Version 3.4 |
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 6:55AM | Sunset 8:01PM | Saturday August 24, 2019 9:21 PM EDT (01:21 UTC) | Moonrise 12:00AM | Moonset 2:04PM | Illumination 30% |  |
AMZ354 Waters From Savannah Ga To Altamaha Sound Ga Out 20 Nm, Including Grays Reef National Marine Sanctuary- 900 Pm Edt Sat Aug 24 2019
Tonight..E winds 5 to 10 kt, becoming ne 10 to 15 kt late. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.
Sun..NE winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms in the morning, then a chance of showers and tstms in the afternoon.
Sun night..NE winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers. A chance of tstms, mainly in the evening.
Mon..NE winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms.
Mon night..NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.
Tue..N winds 5 kt, becoming W in the afternoon. Seas 2 ft. A chance of showers and tstms.
Tue night..SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Wed..W winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Wed night..SW winds 5 kt. Seas 1 foot. A chance of showers and tstms.
Thu..NE winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Thu night..E winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
Tonight..E winds 5 to 10 kt, becoming ne 10 to 15 kt late. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.
Sun..NE winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms in the morning, then a chance of showers and tstms in the afternoon.
Sun night..NE winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers. A chance of tstms, mainly in the evening.
Mon..NE winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms.
Mon night..NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.
Tue..N winds 5 kt, becoming W in the afternoon. Seas 2 ft. A chance of showers and tstms.
Tue night..SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Wed..W winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Wed night..SW winds 5 kt. Seas 1 foot. A chance of showers and tstms.
Thu..NE winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Thu night..E winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 900 Pm Edt Sat Aug 24 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A cold front will cross through the region tonight, then stall just offshore and south of the region on Sunday. Low pressure is expected to pass well offshore early next week, before another cold front impacts the area later in the week.
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A cold front will cross through the region tonight, then stall just offshore and south of the region on Sunday. Low pressure is expected to pass well offshore early next week, before another cold front impacts the area later in the week.
7 Day Forecast for Marine Location Near Flemington, GA
Hourly EDIT Helplocation: 31.95, -81.47 debug
Area Discussion for - Charleston, SC
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus62 kchs 242339 afdchs area forecast discussion national weather service charleston sc 739 pm edt Sat aug 24 2019 Synopsis A cold front will cross through the region tonight, then stall just offshore and south of the region on Sunday. Low pressure is expected to pass well offshore early next week, before another cold front impacts the area later in the week. Near term until 6 am Sunday morning As of 735 pm: clx detected a fine line from georgetown co. West across berkeley and dorchester counties, west to the savannah river site. This line was sliding south between 10-15 kts. Based on surface observations, I suspect that this fine line is associated with the cold front, or the leading edge of cold air damming. I will update the forecast to increase pops along and south of the front, especially the chs tri-county area. Previous discussion: the cold front will continue moving southwards through our area this evening, probably becoming located south of our area by late tonight. Then, distant high pressure will build from the north. The main convective threat should be with and ahead of the front this evening, mainly across our ga counties. Instability isn't overly impressive, so the severe risk is low. However, pwats ~2.25" or 2 standard deviations above normal will lead to potentially very heavy rainfall. Combined with light steering winds aloft, local flooding in low-lying and poorly drained areas is possible. The heaviest precipitation will trend southwards with the front this evening. Models generally show another area developing along the sc coast while inland areas trend drier. We indicated this in the grids, but wouldn't be surprised if more changes need to be made based on radar trends. Low clouds and maybe even some patchy fog cannot be ruled out late tonight. Lows should be in the 70s. Short term 6 am Sunday morning through Tuesday Sunday and Monday: a cold front will slowly progress to the coast and likely stall just offshore and or south of the area to start off the week. As this occurs, a cooler wedge-type pattern will follow, initially setting up across the midlands Sunday, then eventually nudging closer to parts of southeast south carolina and inland southeast georgia on Monday as the quasi-stationary front drifts further south. The position of the front will dictate most precip coverage across the area through Monday and also keep any tropical low development track well offshore over the atlantic. Precip chances should be highest near the southeast georgia coast on Sunday, where pwats remain between 2.00-2.25 inches near the southward moving front. Precip chances could persist into Monday, mainly across southern most locations near the altamaha river where moisture lingers behind the front. Overall instability will remain quite low under cloudy skies both days with little to no threat of severe weather anticipated. Brief heavy rainfall will be the main concern given deep moisture levels and weak wind fields in place. High temps will be a few degrees below normal each day, peaking in the mid 80s across much of southeast south carolina and mid upper 80s across southeast georgia, warmest near the altamaha river. Overnight lows should range in the upper 60s lower 70s well inland to mid upper 70s near the coast. Tuesday: a quasi-stationary front should remain just south of the region, but a wedge-like pattern should weaken across the southeast united states in advance of a mid upper lvl trough of low pressure and associated sfc cold front approaching from the west. Some guidance suggests what is left of a large cluster of thunderstorms currently ongoing across the western gulf of mexico to phase with the longwave trough before shifting toward the area into midweek (bringing higher precip chances to the area). Regardless, a developing southwest sfc flow should advect deeper moisture to the region while mid upper lvl forcing and the sfc front arrive late, likely after sunset. Given the anticipated pattern, scattered to numerous showers and or thunderstorms are possible later in the day, highest chances west of i-95. Temps should warm a few degrees more than the previous day with highs generally ranging in the mid upper 80s (coolest along the coast) to around 90 degrees across inland locations of southeast georgia. Long term Tuesday night through Saturday A tropical low off the mid-atlantic coast Tuesday night will continue to lift northeast away from the region on Wednesday. |
Another cold front is forecast to cross the area later Wednesday or Thursday. The front will likely stall off the coast through late week while high pressure builds inland. Given the front lingering in the vicinity, rain chances will remain in the forecast. Highest pops will be near the coast. Temperatures are expected to be near normal. Aviation 00z Sunday through Thursday Prior to the 0z tafs, kclx detected a fine line from georgetown co. West across berkeley and dorchester counties, west to the savannah river site. This line was sliding south between 10-15 kts. Based on surface observations, I suspect that this fine line is associated with the cold front, or the leading edge of cold air damming. Hrrr and radar trends indicate that showers and thunderstorms that have develop upstream kchs along the front will track over the terminal between 0z-3z, I will highlight with a tempo. Ksav may see a thunderstorms pass within the vicinity between 0z and 3z. Later tonight, in the wake of the front, forecast soundings indicate saturated conditions developing under a llvl inversion. Given the forecast soundings and mos, I will indicate MVFR condition at kchs with ifr ceilings at ksav. Kchs will be positioned between the wedge sfc high to the west and a possible developing low near the gulf stream, creating a decent pressure gradient. I will indicate gusty NE winds at kchs by 15z. Extended aviation outlook: flight restrictions are possible at both chs and sav terminals Sunday and Monday, mainly due to lower cloud ceilings and showers associated with a building wedge-type pattern across the area early next week. Brief flight restrictions will also be possible with showers thunderstorms ahead of an approaching cold front Tuesday into the middle of next week. Marine Tonight: a cold front will move through the waters this evening, becoming located to our south after midnight. Meanwhile, high pressure will be far to our north. The interaction between these two features will cause the surface pressure gradient to become elevated, leading to increasing winds. Expect NE winds to increase to 15-20 kt across our sc waters, including charleston harbor, after midnight. Gusts could approach 25 kt just before daybreak, which is just short of small craft advisory criteria. Our ga waters should have winds of 10-15 kt. Seas will build to 2-4 ft in response to these winds. Sunday through Thursday: high pressure will build across inland areas behind a cold front shifting south of the area early next week while tropical low pressure tracks well east of the area offshore. The pattern will likely result in a tightening pressure gradient over coastal waters Sunday and Monday, favoring north northeast winds 15-20 kts and seas building up to 4-5 ft. Conditions could approach small craft advisory levels for a period on Sunday or Monday before the tropical low departs north northeast of the region Tuesday. Conditions will then remain well below small craft advisory levels through midweek. Rip currents: increasing east northeast winds could contribute to an enhanced risk of rip currents on area beaches late this weekend into early next week, especially if tropical low pressure intensifies while tracking well offshore. Tides coastal flooding Astronomical tides will be running close to minor coastal flood advisory levels next week and onshore winds could lead to even higher tides, mainly during the evening high tide cycles starting Monday. In addition, there is the potential for some heavy rain around the times of high tide which could exacerbate any flooding issues. Chs watches warnings advisories Ga... None. Sc... None. Marine... None. Near term... Ned short term... long term... Etm aviation... Ned 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 | 31 mi | 51 min | E 9.9 G 11 | 84°F | 85°F | 1015.8 hPa | ||
| SAXG1 - Sapelo Island Reserve, GA | 38 mi | 81 min | ENE 4.1 | 82°F | 1014 hPa (+0.0) | 75°F | ||
| 41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA | 50 mi | 91 min | E 9.7 G 12 | 83°F | 84°F | 3 ft | 1014 hPa (+0.0) | 77°F |
Wind History for Fort Pulaski, GA
(wind in knots) EDIT (on/off) Help| 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 | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | |
| Last 24hr | S G6 | SE | S | SE | -- | N | NE | NE | N | N | NE | N | NE | E G10 | E | E | E | E G17 | E | E G13 | E | E G14 | E G14 | E |
| 1 day ago | S | S | S G11 | S G8 | S G8 | S G7 | S G9 | SW | SW | W | W | W | SW | S G7 | S | S G8 | S G10 | SE G10 | S G10 | S G11 | SE G11 | S G14 | SE G11 | SE G12 |
| 2 days ago | S | S | S G7 | S G12 | S G14 | SW G11 | SW G10 | SW | SW | W | W | SW | SW | W G11 | W | S G9 | S G12 | S G11 | S G11 | SE | S G10 | S G10 | S G8 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA | 7 mi | 85 min | N 0 | 10.00 mi | Fair | 76°F | 75°F | 96% | 1014.5 hPa |
| Hunter U. S. Army Airfield, GA | 18 mi | 85 min | ENE 5 | 10.00 mi | Fair | 81°F | 76°F | 86% | 1014.5 hPa |
| Savannah-Hilton Head International Airport, GA | 19 mi | 88 min | E 7 | 10.00 mi | Thunderstorm | 83°F | 77°F | 82% | 1015 hPa |
Link to 5 minute data for KLHW
Wind History from LHW (wind in knots)
| 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 | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | |
| Last 24hr | Calm | Calm | Calm | NW | N | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | NE | NE G19 | NE | Calm | Calm | Calm | Calm | NE |
| 1 day ago | Calm | Calm | Calm | Calm | Calm | Calm | SE | Calm | Calm | Calm | SE | Calm | SW | W | SE | Calm | S | E | SE | SE | E | SE | SE | Calm |
| 2 days ago | SE | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | SW | S | SW | SW | W | Calm | E | SE | E | SE | NE | SE | E |
Tide / Current Tables for Highway bridge, Ogeechee River, Georgia
EDIT Weekend mode (on/off) (on/off) Help One Week of DataHighway bridge
Click for Map
Sat -- 12:54 AM EDT Moonrise
Sat -- 01:01 AM EDT 0.21 feet Low Tide
Sat -- 05:59 AM EDT 0.94 feet High Tide
Sat -- 06:55 AM EDT Sunrise
Sat -- 01:22 PM EDT 0.11 feet Low Tide
Sat -- 03:03 PM EDT Moonset
Sat -- 06:31 PM EDT 1.09 feet High Tide
Sat -- 07:59 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 12:54 AM EDT Moonrise
Sat -- 01:01 AM EDT 0.21 feet Low Tide
Sat -- 05:59 AM EDT 0.94 feet High Tide
Sat -- 06:55 AM EDT Sunrise
Sat -- 01:22 PM EDT 0.11 feet Low Tide
Sat -- 03:03 PM EDT Moonset
Sat -- 06:31 PM EDT 1.09 feet High Tide
Sat -- 07:59 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 |
| 0.3 | 0.2 | 0.3 | 0.5 | 0.7 | 0.9 | 0.9 | 0.9 | 0.8 | 0.6 | 0.5 | 0.3 | 0.2 | 0.1 | 0.1 | 0.3 | 0.6 | 0.9 | 1.1 | 1.1 | 1 | 0.9 | 0.7 | 0.5 |
Tide / Current Tables for Belfast, Belfast River, Georgia
EDIT (on/off) Help One Week of DataBelfast
Click for Map
Sat -- 12:55 AM EDT Moonrise
Sat -- 04:03 AM EDT 7.05 feet High Tide
Sat -- 06:55 AM EDT Sunrise
Sat -- 10:07 AM EDT 0.92 feet Low Tide
Sat -- 03:03 PM EDT Moonset
Sat -- 04:35 PM EDT 8.22 feet High Tide
Sat -- 07:59 PM EDT Sunset
Sat -- 10:53 PM EDT 1.65 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 12:55 AM EDT Moonrise
Sat -- 04:03 AM EDT 7.05 feet High Tide
Sat -- 06:55 AM EDT Sunrise
Sat -- 10:07 AM EDT 0.92 feet Low Tide
Sat -- 03:03 PM EDT Moonset
Sat -- 04:35 PM EDT 8.22 feet High Tide
Sat -- 07:59 PM EDT Sunset
Sat -- 10:53 PM EDT 1.65 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 |
| 3.4 | 4.7 | 5.9 | 6.7 | 7 | 6.7 | 5.6 | 4.2 | 2.7 | 1.5 | 0.9 | 1.3 | 2.4 | 4.1 | 5.8 | 7.2 | 8.1 | 8.1 | 7.3 | 6 | 4.4 | 3 | 2 | 1.7 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
GOES Local Image of 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 (21,6,7,8)
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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. |