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Marine Weather and Tides
Version 3.4 |
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome. 10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name. |
| Sunrise 6:57AM | Sunset 6:10PM | Wednesday February 20, 2019 11:20 AM EST (16:20 UTC) | Moonrise 7:33PM | Moonset 7:51AM | Illumination 99% |  |
AMZ256 Coastal Waters From Murrells Inlet To South Santee River Sc Out 20 Nm- 940 Am Est Wed Feb 20 2019
.small craft advisory in effect until 9 pm est this evening...
Rest of today..E winds 15 to 20 kt, becoming se 10 to 15 kt early this afternoon, then becoming S 10 kt late. Seas 5 to 7 ft. Periods of rain late this morning and early afternoon, then a chance of rain late. Vsby 1 to 3 nm, decreasing to 1 nm or less this afternoon.
Tonight..SW winds 10 kt. Seas 4 to 6 ft. A chance of showers, mainly in the evening. Patchy fog late.
Thu..SW winds 10 to 15 kt. Seas 4 to 5 ft. Areas of fog. A slight chance of showers.
Thu night..W winds 10 kt. Seas 3 to 4 ft. Areas of fog in the evening. A chance of showers.
Fri..NE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 3 to 4 ft, building to 4 to 6 ft in the afternoon. A chance of showers.
Fri night..NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 4 to 6 ft. A chance of showers.
Sat..E winds 10 to 15 kt, becoming sw. Seas 3 to 4 ft. A chance of showers through the day.
Sun..SW winds 15 to 20 kt, becoming w. Seas 4 to 5 ft. A chance of showers through the day.
.small craft advisory in effect until 9 pm est this evening...
Rest of today..E winds 15 to 20 kt, becoming se 10 to 15 kt early this afternoon, then becoming S 10 kt late. Seas 5 to 7 ft. Periods of rain late this morning and early afternoon, then a chance of rain late. Vsby 1 to 3 nm, decreasing to 1 nm or less this afternoon.
Tonight..SW winds 10 kt. Seas 4 to 6 ft. A chance of showers, mainly in the evening. Patchy fog late.
Thu..SW winds 10 to 15 kt. Seas 4 to 5 ft. Areas of fog. A slight chance of showers.
Thu night..W winds 10 kt. Seas 3 to 4 ft. Areas of fog in the evening. A chance of showers.
Fri..NE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 3 to 4 ft, building to 4 to 6 ft in the afternoon. A chance of showers.
Fri night..NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 4 to 6 ft. A chance of showers.
Sat..E winds 10 to 15 kt, becoming sw. Seas 3 to 4 ft. A chance of showers through the day.
Sun..SW winds 15 to 20 kt, becoming w. Seas 4 to 5 ft. A chance of showers through the day.
AMZ200 940 Am Est Wed Feb 20 2019
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. A coastal front just offshore will track toward the coast, pushing onshore tonight and further inland before dissipating during Thu. A cold front dropping southward late Thu will stall across or just south of the forecast area Fri and Sat. Sun will see this front return north as a warm front, pushing across the area early in the day. The next cold front will arrive from the west Sun night.
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. A coastal front just offshore will track toward the coast, pushing onshore tonight and further inland before dissipating during Thu. A cold front dropping southward late Thu will stall across or just south of the forecast area Fri and Sat. Sun will see this front return north as a warm front, pushing across the area early in the day. The next cold front will arrive from the west Sun night.
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 201553 afdchs area forecast discussion national weather service charleston sc 1053 am est Wed feb 20 2019 Synopsis A nearly stationary front will meander near the area through Saturday morning. A cold front will sweep through from the west late Sunday, followed by high pressure on Monday. A low pressure system could affect the area next Tuesday. Near term through tonight Several changes were made with this update. Pops weather: radar indicates scattered to numerous showers generally across our sc counties this morning, moving to the nne. We adjusted the hourly grids to try to better capture it's movement and the drier conditions to the south and west of it. Temperatures dew points: observations are fairly close to what's in the forecast. Models indicate temperatures really increasing this afternoon, especially across southeast ga. The concern is the warm front will be slower to move onshore and erode the cold air, especially with low ceilings sticking around most places. So it's possible the highs may be overdone. But we won't rush to make any changes, instead waiting to see the hourly observation trends. Tonight: the warm front will completely lift north of the forecast area as a cold front slides east off the southern appalachians. Winds across the CWA is forecast to shift from the south late this evening and will remain through tonight. Sfc dewpoints are expected to warm into the low 60s by midnight. Near shore buoys indicate that water temperatures remain in the mid 50s. Warm and moisture return flow across the cooler shelf waters will favor the development of sea fog, building over the coast with time. At this time, it is uncertain if the fog will become widespread and dense or remain patchy dense. Low temperatures around 60 will be common tonight. Short term Thursday through Saturday The area should be solidly in the warm-sector on Thursday with the front to the north. We may see some brief, partial clearing during the daytime hours. Temps soaring into the upper 70s to lower 80s and dewpoints in the low to mid 60s will produce modest surface-based instability. We held onto a slight chance of showers given weak upper shortwave energy propagating through the area. Thursday night the front to our north will begin shifting south, potentially moving into our far northern zones close to daybreak Friday. Isentropic ascent will gradually increase overnight with scattered showers possible, mainly inland. Conditions look ripe for areas of fog to develop along and south of the front. The backdoor cold front will drop south to near the savannah river on Friday, allowing northeast flow to redevelop over southern sc. Isentropic ascent will strengthen from north to south during the day, likely producing scattered showers mainly over southern sc, highest coverage inland. High temps will range from lower 60s far north to lower 80s far south. The stalled front will remain across the area through Friday night, then slowly move north on Saturday. Rain chances will gradually dwindle during this period. Highs on Saturday will be in the mid to upper 70s in most locations. Long term Saturday night through Tuesday A potent cold front will sweep through the area Sunday afternoon though only scattered showers are expected to accompany it. Strong warm air advection ahead of the front will produce high temps in the upper 70s on Sunday. Somewhat cooler weather is in store for Monday through Wednesday as a series of high pressure areas move into the area. A gulf low pressure system could bring |
some rain to the area Tuesday and Tuesday night. Aviation 16z Wednesday through Sunday A coastal trough will drift slowly onshore during the daylight hours, becoming a warm front. Ifr to maybe brief MVFR ceilings and periods of light rain are expected through this afternoon. The warm front is forecast to slide west of the terminals by this evening. Flow will shift from the south and sea fog is expected to develop across the shelf waters, then advect onshore impacting the terminals as ifr ceilings and possibly ifr visibility. Extended aviation outlook: low ceilings are likely Wednesday night through Thursday morning. Low ceilings and or reduced visibility likely Thursday night through Saturday morning. Marine Rest of today: ridging high pressure this morning will shift inland as an trough and warm front slides across the nearshore waters. Winds will gradually ease and transition to east and then southeast, first in the ga waters and then in the sc waters. Small craft advisories remain in effect for the ocean waters, but they are expected to expire for some of the waters today as conditions improve. Tonight: in the wake of the passing warm front, winds will remain steady from the sw. Sfc dewpoints are expected to warm into the low 60s by midnight. Near shore buoys indicate that water temperatures remain in the mid 50s. Warm and moisture return flow across the cooler shelf waters will favor the development of sea fog, building over the coast with time. At this time, it is uncertain if the fog will become widespread and dense or remain patchy dense. Wave heights of six feet should be limited to the outer portions of amz350 and 374. A brief window for small craft advisory conditions will exist late Friday night over the charleston sc nearshore waters behind a backdoor cold front. More widespread SCA conditions are possible Sunday ahead of a cold front. The more significant concern is the likely development and persistence of sea fog due to surface dewpoints in the low to mid 60s moving over the cool shelf waters. The most likely time frame will be Thursday and Thursday night when low-level flow is southerly. By midday Friday the winds will be northeast which is less favorable. Tides coastal flooding This evening's high tide is the lower of the two for the day. The wind direction is forecasted to shift towards the south and ease, but residual anomalies could allow the tide to briefly approach minor coastal flooding advisory criteria at charleston. Chs watches warnings advisories Ga... None. Sc... None. Marine... Small craft advisory until noon est today for amz352-354. Small craft advisory until 4 pm est Thursday for amz374. Small craft advisory until midnight est tonight for amz350. Near term... short term... long term... Jrl 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 | 95 min | NE 12 | 54°F | 1023 hPa | 54°F | ||
| 41029 - Capers Nearshore (CAP 2) | 35 mi | 72 min | NE 12 G 14 | 57°F | 56°F | 1022.4 hPa | ||
| CHTS1 | 39 mi | 32 min | NNW 1.9 G 13 | |||||
| FBIS1 - Folly Island, SC | 45 mi | 80 min | N 8 G 8.9 | 58°F | 1022.7 hPa (-0.9) | 58°F |
Wind History for Charleston, SC
(wind in knots) EDIT (on/off) Help| 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 | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | |
| Last 24hr | N | N | N G16 | NE G19 | NE G24 | NE G24 | NE G23 | N G21 | NE G23 | NE G22 | N | NE G26 | NE G25 | NE G22 | NE G24 | NE G25 | NE G21 | NE G19 | W G10 | SE G5 | N G7 | N G8 | N G9 | NW |
| 1 day ago | NW G7 | W G9 | NW G11 | W G10 | NW G7 | W | NE | SW | W | NW | N | NW | N G10 | NE | NE | NE | NE G17 | NE G19 | NE G17 | N G19 | N G21 | N G16 | N | N G17 |
| 2 days ago | N | NE | SE | NE | SE | E | E | NE | E G7 | E | SE | SE | S | SW G17 | SW G17 | SW G14 | SW | SW | SW | SW G8 | SW | N G8 | N | NW G6 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Georgetown County Airport , SC | 19 mi | 25 min | NNE 6 | 5.00 mi | Fog/Mist | 54°F | 53°F | 100% | 1023.7 hPa |
| Moncks Corner Berkeley County, SC | 21 mi | 25 min | N 5 | 3.00 mi | Fog/Mist | 48°F | 48°F | 100% | 1023.7 hPa |
Wind History from GGE (wind in knots)
| 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 PM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | |
| Last 24hr | NE | NE G16 | NE G17 | NE G19 | NE | NE G20 | NE G21 | NE | NE G20 | NE G21 | NE G21 | NE G23 | NE G17 | NE | NE G16 | NE | NE | E G18 | NE G17 | NE | NE | NE | N | NE |
| 1 day ago | W | NW | NW | NW G16 | NW | NW | Calm | Calm | Calm | Calm | Calm | NE | Calm | NE | NE | NE | NE G19 | NE | N | NE | NE G17 | NE | NE | NE |
| 2 days ago | Calm | E | NE | Calm | NE | Calm | Calm | Calm | E | E | SE | SE | S | S | SW G16 | SW G21 | SW G14 | SW | SW | W | NW G14 | Calm | W | W |
Tide / Current Tables for Jamestown Bridge, Santee River, South Carolina
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of DataJamestown Bridge
Click for Map
Wed -- 12:22 AM EST 1.27 feet High Tide
Wed -- 06:57 AM EST Sunrise
Wed -- 07:50 AM EST Moonset
Wed -- 08:40 AM EST -0.41 feet Low Tide
Wed -- 12:47 PM EST 1.43 feet High Tide
Wed -- 06:07 PM EST Sunset
Wed -- 07:32 PM EST Moonrise
Wed -- 09:12 PM EST -0.32 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 12:22 AM EST 1.27 feet High Tide
Wed -- 06:57 AM EST Sunrise
Wed -- 07:50 AM EST Moonset
Wed -- 08:40 AM EST -0.41 feet Low Tide
Wed -- 12:47 PM EST 1.43 feet High Tide
Wed -- 06:07 PM EST Sunset
Wed -- 07:32 PM EST Moonrise
Wed -- 09:12 PM EST -0.32 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 |
| 1.2 | 1.3 | 1.1 | 0.9 | 0.6 | 0.3 | 0 | -0.2 | -0.4 | -0.4 | 0.1 | 0.8 | 1.3 | 1.4 | 1.3 | 1.2 | 0.9 | 0.6 | 0.3 | -0 | -0.2 | -0.3 | -0.1 | 0.4 |
Tide / Current Tables for Pleasant Hill Landing, Santee River, South Carolina
EDIT (on/off) Help One Week of DataPleasant Hill Landing
Click for Map
Wed -- 06:02 AM EST -0.96 feet Low Tide
Wed -- 06:56 AM EST Sunrise
Wed -- 07:49 AM EST Moonset
Wed -- 10:56 AM EST 2.86 feet High Tide
Wed -- 06:07 PM EST Sunset
Wed -- 06:34 PM EST -0.73 feet Low Tide
Wed -- 07:32 PM EST Moonrise
Wed -- 11:24 PM EST 2.62 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 06:02 AM EST -0.96 feet Low Tide
Wed -- 06:56 AM EST Sunrise
Wed -- 07:49 AM EST Moonset
Wed -- 10:56 AM EST 2.86 feet High Tide
Wed -- 06:07 PM EST Sunset
Wed -- 06:34 PM EST -0.73 feet Low Tide
Wed -- 07:32 PM EST Moonrise
Wed -- 11:24 PM EST 2.62 feet High 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 |
| 2.3 | 1.8 | 1.1 | 0.4 | -0.3 | -0.8 | -1 | -0.5 | 0.5 | 1.7 | 2.6 | 2.9 | 2.7 | 2.3 | 1.7 | 1 | 0.3 | -0.3 | -0.7 | -0.7 | 0.1 | 1.1 | 2 | 2.6 |
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 (11,2,3,4)
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Ground Weather Radar Station Wilmington, NC
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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. |