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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 6:47AM | Sunset 7:58PM | Friday August 23, 2019 8:03 PM EDT (00:03 UTC) | Moonrise 11:46PM | Moonset 12:59PM | Illumination 41% |  |
AMZ256 Coastal Waters From Murrells Inlet To South Santee River Sc Out 20 Nm- 602 Pm Edt Fri Aug 23 2019
Tonight..S winds 10 to 15 kt, becoming sw 10 kt late. Seas 2 to 3 ft.
Sat..S winds 10 kt. Seas 2 ft. A chance of showers and tstms in the morning, then showers and tstms likely in the afternoon.
Sat night..E winds 10 kt. Seas 2 ft. Showers. Tstms likely, mainly in the evening.
Sun..NE winds 10 kt, increasing to 15 to 20 kt in the afternoon. Seas 3 to 4 ft. Showers. A chance of tstms in the morning, then tstms in the afternoon.
Sun night..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Showers and tstms likely.
Mon..NE winds 15 to 20 kt, diminishing to 10 kt. Seas 3 to 4 ft. A chance of tstms through the day. A chance of showers.
Tue..E winds 5 kt, becoming s. Seas 2 ft. A chance of showers. A chance of tstms through the night.
Wed..S winds 10 kt. Seas 2 ft. A chance of showers and tstms. Winds and seas higher in and near tstms.
Tonight..S winds 10 to 15 kt, becoming sw 10 kt late. Seas 2 to 3 ft.
Sat..S winds 10 kt. Seas 2 ft. A chance of showers and tstms in the morning, then showers and tstms likely in the afternoon.
Sat night..E winds 10 kt. Seas 2 ft. Showers. Tstms likely, mainly in the evening.
Sun..NE winds 10 kt, increasing to 15 to 20 kt in the afternoon. Seas 3 to 4 ft. Showers. A chance of tstms in the morning, then tstms in the afternoon.
Sun night..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Showers and tstms likely.
Mon..NE winds 15 to 20 kt, diminishing to 10 kt. Seas 3 to 4 ft. A chance of tstms through the day. A chance of showers.
Tue..E winds 5 kt, becoming s. Seas 2 ft. A chance of showers. A chance of tstms through the night.
Wed..S winds 10 kt. Seas 2 ft. A chance of showers and tstms. Winds and seas higher in and near tstms.
AMZ200 602 Pm Edt Fri Aug 23 2019
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. A cold front will drop southward into the area early Saturday before stalling just offshore Sunday and Monday. Meanwhile, some slow tropical development is possible with an area of low pressure to move ne from the bahamas and florida Sunday and Monday. Mariners should Monitor the forecast closely for potential changes.
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. A cold front will drop southward into the area early Saturday before stalling just offshore Sunday and Monday. Meanwhile, some slow tropical development is possible with an area of low pressure to move ne from the bahamas and florida Sunday and Monday. Mariners should Monitor the forecast closely for potential changes.
7 Day Forecast for Marine Location Near James, SC
Hourly EDIT Helplocation: 33.31, -79.68 debug
Area Discussion for - Charleston, SC
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus62 kchs 232323 afdchs area forecast discussion national weather service charleston sc 723 pm edt Fri aug 23 2019 Synopsis Atlantic high pressure will prevail this evening, before a cold front approaches from the north tonight. The front will cross through the area on Saturday, then stall offshore Sunday. Low pressure could pass well offshore during the first half of next week. Another cold front could impact the region late next week. Near term until 6 am Saturday morning We'll continue to see isolated to scattered convection through the mid to late evening, when the href depiction of the strongest updrafts comes to an end. There is the tail of a vort lobe to the north, and enough lingering meso-scale boundaries to hold onto 20-30% pop far inland prior to midnight. Dcape is still as high as 800-1000 j kg, which will support an isolated strong storm or two. There has even been some indications of hail (at least aloft) with a few of the previous and ongoing storms, so we can't entirely rule out small hail in a storm also. Plus due to limited storm motion, abundant pwat near or greater than 2 inches, and back-building of a few cells, locally heavy rains can occur. Since there is an upstream cold front that draws closer late, we have maintained slight chance pop north and west after midnight. But south and east areas look to stay rainfree the entire night. There are better signals of some fog after about 4 or 5 am, and we may need to add to the forecast with our next update. Persistence will be tough to beat in regards to low temps. Also, our low so far today at kcxm has been 81f, which presently ties it with 2014 and 2016 for the record high min for august 23. Short term 6 am Saturday morning through Monday Saturday: a cold front associated with a large mid upper lvl trough of low pressure will approach from the northwest during the day. Ahead of the front, an onshore wind will advect deep moisture characterized by pwats between 2.00-2.25 inches across the region, helping set up a round of at least scattered to numerous showers and thunderstorms during the afternoon evening. Modest instability (sbcape 1500-1750 j kg) should limit the overall severe weather threat. However, an isolated strong or severe thunderstorm can not be ruled out during the afternoon into early evening. The greater concern will be localized heavy rainfall given deep moisture and weak wind fields in place as the front slowly shifts into the region. Activity should slowly weaken, but persist into overnight hours. High temps should range in the upper 80s to lower 90s, warmest away from the coast in southeast georgia. Overnight lows should range in the low 70s inland to mid upper 70s near the coast. Sunday and Monday: a cold front will slowly progress to the coast and likely stall along or just offshore Sunday, then slowly drift further south and east into Monday. As the occurs, a potential tropical cyclone will track north northeast well offshore. The position of the front and tropical entity offshore will play a fairly significant role in how much precip can be expected across southeast south carolina and southeast georgia early next week. Precip chances should be highest east of the i-95 corridor on Sunday where pwats remain between 2.00-2.25 inches near the slowly moving front shifting offshore. Enhanced precip chances could persist near the coast through Monday as tropical low pressure shifts past the area well offshore, but the overall threat of heavy rainfall should be more limited compared to Sunday given the expected position of the sfc front offshore and the area remaining well west of any tropical cyclone track. Severe weather potential is quite low Sunday and especially Monday given abundant clouds and little instability. Afternoon highs should be a few degrees below normal, ranging in the mid upper 80s. Overnight lows should range around 70 well inland to low mid 70s near the coast. |
Long term Monday night through Friday Models are in good agreement that low pressure will be lifting northeast away from the area Monday night into Tuesday. Another cold front could impact the region later in the period. There are some discrepancies in regards to convective coverage but with elevated moisture and shortwave energy, it looks to stay a bit unsettled. Temperatures are expected to be near normal. Aviation 00z Saturday through Wednesday Conditions are expected to beVFR a large portion of the time at both kchs and ksav tonight and Saturday morning. However, there are concerns for possible restrictions at ksav between about 10z and 13z Saturday due to fog and or stratus. There then looks to be scattered to numerous shra tsra across the local region Saturday afternoon and evening as a cold front draws closer from the north. Aided by a low level flow off the ocean and upper difluence, there is a good chance that at least occasional flight restrictions (if not more prolonged sub-vfr weather) will occur. For now we have just vcts and CB clouds at both terminals, but adjustments will definitely be required in later TAF issuances with the potential for some heavy rainfall. Extended aviation outlook: periodic flight restrictions are possible Saturday night Sunday due to showers thunderstorms associated with a slowly passing cold front. Brief flight restrictions are possible Monday and Tuesday behind a front stalled offshore. Marine Tonight: tranquil weather is expected with S to SE winds at or below 12 kt in the evening, becoming mainly S or SW at or below 10 kt by daybreak. Seas will be 1-3 ft. Saturday through Wednesday: a cold front will approach from the north northwest Saturday and stall across the coastal waters through early next week. Well south of the region, a tropical low should slowly strengthen while gaining latitude off eastern florida, remaining beyond all coastal waters while tracking north northeast well off the southeast coast. The setup will initially favor southeast winds across coastal waters Saturday at or below 10-15 kt, before turning predominately northeast and increasing to 15-20 kt Sunday and Monday as the pressure gradient tightens between the stalled front and passing tropical low offshore. Seas should also build up to 4-5 ft. Conditions could approach small craft advisory levels for a period on 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... short term... long term... Etm 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 |
| NIWS1 - North Inlet-Winyah Bay Reserve, SC | 26 mi | 79 min | NW 5.1 | 79°F | 1016 hPa | 73°F | ||
| 41029 - Capers Nearshore (CAP 2) | 35 mi | 56 min | S 7.8 G 12 | 84°F | 86°F | 1016.1 hPa | ||
| CHTS1 | 39 mi | 64 min | S 7 G 8 | 85°F | 86°F | 1016.2 hPa (+0.0) | ||
| FBIS1 - Folly Island, SC | 45 mi | 64 min | SSE 8 G 8.9 | 84°F | 1016.6 hPa (+0.0) | 76°F | ||
| MROS1 - 8661070 - Springmaid Pier, SC | 47 mi | 64 min | 80°F |
Wind History for Charleston, SC
(wind in knots) EDIT (on/off) Help| 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 | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | |
| Last 24hr | SW | S G8 | S | S | S G9 | SW G8 | S | SW G8 | SW | S | SW | SW | SW | SW | SW G7 | S | E | S | S | S | S | S | SE | S |
| 1 day ago | SW G7 | SW | SW G8 | S G10 | S G10 | S | SW | SW | SW | SW | SW | W | SW G7 | W | SW G9 | W G11 | S G10 | S | S G13 | S | S G12 | S G10 | S G12 | S G12 |
| 2 days ago | S | S G12 | S | S | S | S | S G9 | W | SW | W | W | W | SW G6 | SW G9 | W | S G10 | S G6 | S | S G12 | S G13 | SW | S G12 | SW G14 | SW G9 |
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 |
| Georgetown County Airport , SC | 19 mi | 69 min | N 0 | 10.00 mi | Fair | 75°F | 69°F | 83% | 1016.3 hPa |
| Moncks Corner Berkeley County, SC | 21 mi | 89 min | ENE 8 | 10.00 mi | Fair | 81°F | 71°F | 74% | 1015.9 hPa |
Link to 5 minute data for KGGE
Wind History from GGE (wind in knots)
| 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 | S | S | Calm | Calm | Calm | S | Calm | Calm | Calm | Calm | Calm | W | W | SW | W | W | SE | S | S | S G16 | S | N G14 | Calm |
| 1 day ago | S | S | S | S | SW | Calm | Calm | Calm | SW | Calm | W | Calm | W | W | W | W | SW | W | W | S | S | S | S | S |
| 2 days ago | S | S | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | W | SW | W | W | SW | SW | SW | S | SW G15 | S | SW | SW |
Tide / Current Tables for Jamestown Bridge, Santee River, South Carolina
EDIT Weekend mode (on/off) (on/off) Help One Week of DataJamestown Bridge
Click for Map
Fri -- 12:06 AM EDT Moonrise
Fri -- 01:59 AM EDT 0.43 feet Low Tide
Fri -- 05:36 AM EDT 1.06 feet High Tide
Fri -- 06:46 AM EDT Sunrise
Fri -- 10:58 AM EDT Last Quarter
Fri -- 01:59 PM EDT Moonset
Fri -- 02:18 PM EDT 0.26 feet Low Tide
Fri -- 06:22 PM EDT 1.19 feet High Tide
Fri -- 07:55 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:06 AM EDT Moonrise
Fri -- 01:59 AM EDT 0.43 feet Low Tide
Fri -- 05:36 AM EDT 1.06 feet High Tide
Fri -- 06:46 AM EDT Sunrise
Fri -- 10:58 AM EDT Last Quarter
Fri -- 01:59 PM EDT Moonset
Fri -- 02:18 PM EDT 0.26 feet Low Tide
Fri -- 06:22 PM EDT 1.19 feet High Tide
Fri -- 07:55 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 |
| 0.5 | 0.5 | 0.4 | 0.5 | 0.8 | 1 | 1.1 | 1 | 0.9 | 0.8 | 0.7 | 0.5 | 0.4 | 0.3 | 0.3 | 0.3 | 0.6 | 1 | 1.2 | 1.2 | 1.1 | 1 | 0.9 | 0.8 |
Tide / Current Tables for Pleasant Hill Landing, Santee River, South Carolina
EDIT (on/off) Help One Week of DataPleasant Hill Landing
Click for Map
Fri -- 12:06 AM EDT Moonrise
Fri -- 03:45 AM EDT 2.11 feet High Tide
Fri -- 06:46 AM EDT Sunrise
Fri -- 10:58 AM EDT Last Quarter
Fri -- 11:40 AM EDT 0.60 feet Low Tide
Fri -- 01:58 PM EDT Moonset
Fri -- 04:31 PM EDT 2.39 feet High Tide
Fri -- 07:54 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:06 AM EDT Moonrise
Fri -- 03:45 AM EDT 2.11 feet High Tide
Fri -- 06:46 AM EDT Sunrise
Fri -- 10:58 AM EDT Last Quarter
Fri -- 11:40 AM EDT 0.60 feet Low Tide
Fri -- 01:58 PM EDT Moonset
Fri -- 04:31 PM EDT 2.39 feet High Tide
Fri -- 07:54 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 |
| 1 | 1.4 | 1.8 | 2.1 | 2.1 | 2 | 1.9 | 1.6 | 1.3 | 1 | 0.8 | 0.6 | 0.6 | 0.9 | 1.5 | 2.1 | 2.3 | 2.4 | 2.3 | 2.1 | 1.8 | 1.5 | 1.3 | 1.1 |
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 (20,4,5,8)
(on/off) Help
Ground Weather Radar Station Wilmington, NC
(on/off) Help
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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. |