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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 6:45AM | Sunset 7:59PM | Wednesday August 21, 2019 8:45 PM EDT (00:45 UTC) | Moonrise 10:33PM | Moonset 11:04AM | Illumination 61% |  |
AMZ330 Charleston Harbor- 606 Pm Edt Wed Aug 21 2019
Tonight..SW winds 15 kt with gusts to 20 kt early, diminishing to 5 to 10 kt. Waves locally 1 to 2 ft. A chance of showers and tstms this evening.
Thu..SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts to 20 kt in the afternoon. A slight chance of showers and tstms.
Thu night..SW winds 10 to 15 kt. A slight chance of showers and tstms.
Fri..SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts to 20 kt in the afternoon. A chance of showers and tstms.
Fri night..S winds 10 to 15 kt, becoming sw 5 to 10 kt after midnight. A chance of showers and tstms.
Sat..SW winds 5 kt, becoming S in the afternoon. A chance of showers and tstms.
Sat night..S winds 5 to 10 kt. A chance of showers and tstms.
Sun..E winds 5 to 10 kt. Showers and tstms likely.
Sun night..E winds 5 to 10 kt. A chance of showers and tstms.
Mon..E winds 5 to 10 kt. A chance of showers and tstms.
Mon night..SE winds 5 to 10 kt. A chance of showers and tstms. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 86 degrees.
Tonight..SW winds 15 kt with gusts to 20 kt early, diminishing to 5 to 10 kt. Waves locally 1 to 2 ft. A chance of showers and tstms this evening.
Thu..SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts to 20 kt in the afternoon. A slight chance of showers and tstms.
Thu night..SW winds 10 to 15 kt. A slight chance of showers and tstms.
Fri..SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts to 20 kt in the afternoon. A chance of showers and tstms.
Fri night..S winds 10 to 15 kt, becoming sw 5 to 10 kt after midnight. A chance of showers and tstms.
Sat..SW winds 5 kt, becoming S in the afternoon. A chance of showers and tstms.
Sat night..S winds 5 to 10 kt. A chance of showers and tstms.
Sun..E winds 5 to 10 kt. Showers and tstms likely.
Sun night..E winds 5 to 10 kt. A chance of showers and tstms.
Mon..E winds 5 to 10 kt. A chance of showers and tstms.
Mon night..SE winds 5 to 10 kt. A chance of showers and tstms. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 86 degrees.
AMZ300 606 Pm Edt Wed Aug 21 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Atlantic high pressure and an inland trough will prevail through late week. A cold front will then push into the area this weekend before stalling over or just south of the area through early next week.
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Atlantic high pressure and an inland trough will prevail through late week. A cold front will then push into the area this weekend before stalling over or just south of the area through early next week.
7 Day Forecast for Marine Location Near Mount Pleasant, SC
Hourly EDIT Helplocation: 32.93, -79.83 debug
Area Discussion for - Charleston, SC
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus62 kchs 212220 afdchs area forecast discussion national weather service charleston sc 620 pm edt Wed aug 21 2019 Synopsis Atlantic high pressure and an inland trough will prevail through late week. A cold front will then push into the area this weekend before stalling over or just south of the area through early next week. Near term until 6 am Thursday morning Boundary collisions and moderately unstable conditions are supporting scattered showers tstms across the interior early this evening. Tstms will linger for a few more hours before diminishing with the loss of insolation. Pops were adjusted slightly for the next several hours to take current radar and mesoscale trends into account. Expect mainly dry conditions overnight with debris cloudiness gradually diminishing with time. Similar to the past several nights, some marine-based stratocumulus is expected to move inland from off the atlantic, especially at the beaches. Lows will range from the mid 70s inland to around 80 at the beaches and downtown charleston. Short term 6 am Thursday morning through Saturday The mid-level pattern will be in transition with troughing to our north, high pressure to our southeast dissipating, and low pressure even further to our southeast approaching as time progresses. At the surface, our area will remain between high pressure in the atlantic and a trough inland Thursday and Friday. By Saturday a cold front will approach from the north, but models currently show it remaining just north of our area during the daylight hours. Moisture will gradually increase throughout the short term. Pwats will start ~2" on Thursday, gradually increasing into Saturday. There are hints at a band of 2.5" pwats approaching our area from the north, ahead of the front on Saturday. The thunderstorm threat on Thursday is low, with only a brief period of chance pops forecasted along the sea breeze late in the afternoon. Friday the parameters improve (moisture, lift, etc.), so we have pops a bit higher, into the chance category for most of the area during the afternoon. On Saturday pops increase from north to south, especially in the afternoon. The highest pops are in the north near the approaching front, where we have likely pops. These will need to be adjusted with the upcoming forecasts. The risk of severe thunderstorms is low. Though, heavy rainfall is possible due to the abundant moisture. Temperatures will be near normal throughout the period. |
Long term Saturday night through Wednesday Low confidence this period. The pattern doesn't change much until a cold front likely pushes into the area this weekend, probably starting Saturday night, before stalling over or near the area into the middle of next week. Rain chances should end up being above normal but confidence is lower regarding temperatures as much depends on the location of the front and rain cloud coverage. Probably the biggest issue this period will be periods of heavy rain which could cause some flooding, especially near the coast early next week when astronomical tides will already be higher than normal. Aviation 22z Wednesday through Monday May need to include vcts or a brief tsra at kchs through 01z depending on radar trends at issuance time, otherwiseVFR will prevail at both kchs and ksav. Extended aviation outlook: there is a low probability of flight restrictions Thursday and Friday afternoon evening due to showers thunderstorms. Flight restrictions appear more likely this weekend into early next week due to a cold front. Marine Tonight: the expansive bermuda-azores high is again the most prominent feature across the local waters. This will maintain s to SW winds as high as 12-17 kt a good portion of the night, before they start to veer more toward the SW and W and diminish around 3-5 kt late with land breeze influences occurring. Seas will average 2 to 3 feet throughout. Extended marine: no small craft advisories are expected. The coastal waters will be sandwiched between high pressure in the atlantic and a trough inland through late week. A cold front will then move into the area this weekend, then become stationary overhead or nearby through early next week. The strongest winds Thursday and Friday appear to be along the land sea interface each afternoon (including charleston harbor) due to the sea breeze. Chs watches warnings advisories Ga... None. Sc... None. Marine... None. |
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 |
| CHTS1 | 11 mi | 45 min | SSW 4.1 G 7 | 84°F | 86°F | 1018.4 hPa (+0.3) | ||
| 41029 - Capers Nearshore (CAP 2) | 14 mi | 37 min | SW 14 G 18 | 84°F | 85°F | 1018.2 hPa | ||
| FBIS1 - Folly Island, SC | 17 mi | 45 min | SSW 12 G 14 | 84°F | 1018.7 hPa (+0.0) | 76°F | ||
| ACXS1 - ACE Basin Reserve, SC | 42 mi | 60 min | Calm | 84°F | 1018 hPa | 75°F | ||
| NIWS1 - North Inlet-Winyah Bay Reserve, SC | 45 mi | 60 min | SW 5.1 | 84°F | 1017 hPa | 77°F | ||
| 41004 - EDISTO - 41 NM Southeast of Charleston, SC | 49 mi | 25 min | SSW 12 G 14 | 83°F | 84°F | 1018.2 hPa | 76°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 | 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 |
| 1 day ago | S G9 | SW | SW | S | SW G8 | SW | S G9 | S | SW | SW | SW | S | S G7 | S G8 | S | S G11 | S | SE | S | S | SE G12 | S G15 | S | |
| 2 days ago | S G9 | S | SW G9 | SW G8 | SW G6 | SW | W | SW | SW | W | W G6 | NW | SW | SW | S | S | S G10 | S | S | S G13 | S G16 | S G14 | S G11 | S G12 |
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 |
| Mount Pleasant Regional-Faison Field, SC | 3 mi | 50 min | SSW 5 | 8.00 mi | Fair | 82°F | 75°F | 79% | 1017.9 hPa |
| Charleston, Charleston Air Force Base, SC | 11 mi | 1.8 hrs | SSW 7 | 10.00 mi | Mostly Cloudy | 84°F | 72°F | 67% | 1017.9 hPa |
| Charleston Executive Airport, SC | 18 mi | 50 min | S 4 | 10.00 mi | Fair | 82°F | 75°F | 79% | 1018.3 hPa |
| Moncks Corner Berkeley County, SC | 21 mi | 70 min | S 3 | 10.00 mi | Fair | 77°F | 75°F | 94% | 1017.6 hPa |
Link to 5 minute data for KLRO
Wind History from LRO (wind in knots)
| 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 | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | |
| Last 24hr | S | Calm | Calm | Calm | Calm | W | W | SW | SW | S | S | S G17 | S | S G14 | S | SW | ||||||||
| 1 day ago | Calm | S | S | Calm | Calm | Calm | Calm | Calm | G12 | S | S | S | S | S G12 | G13 | S | S | |||||||
| 2 days ago | S | S | Calm | S | Calm | Calm | Calm | Calm | Calm | Calm | SW | S G13 | S | S | S | S G15 | S G17 | SW | S G11 | S |
Tide / Current Tables for Cainhoy, Wando River, South Carolina
EDIT Weekend mode (on/off) (on/off) Help One Week of DataCainhoy
Click for Map
Wed -- 12:38 AM EDT 5.97 feet High Tide
Wed -- 06:46 AM EDT Sunrise
Wed -- 06:47 AM EDT 0.71 feet Low Tide
Wed -- 12:04 PM EDT Moonset
Wed -- 01:06 PM EDT 6.14 feet High Tide
Wed -- 07:08 PM EDT 1.19 feet Low Tide
Wed -- 07:57 PM EDT Sunset
Wed -- 11:33 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 12:38 AM EDT 5.97 feet High Tide
Wed -- 06:46 AM EDT Sunrise
Wed -- 06:47 AM EDT 0.71 feet Low Tide
Wed -- 12:04 PM EDT Moonset
Wed -- 01:06 PM EDT 6.14 feet High Tide
Wed -- 07:08 PM EDT 1.19 feet Low Tide
Wed -- 07:57 PM EDT Sunset
Wed -- 11:33 PM EDT Moonrise
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 |
| 5.9 | 5.9 | 5.4 | 4.4 | 3.1 | 1.8 | 0.9 | 0.7 | 1.2 | 2.4 | 3.8 | 5 | 5.8 | 6.1 | 5.9 | 5.1 | 3.8 | 2.5 | 1.6 | 1.2 | 1.4 | 2.2 | 3.4 | 4.6 |
Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
EDIT (on/off) Help One Week of DataCharleston Harbor Entrance
Click for Map
Wed -- 12:24 AM EDT -0.00 knots Slack
Wed -- 03:46 AM EDT -1.89 knots Max Ebb
Wed -- 06:46 AM EDT Sunrise
Wed -- 06:56 AM EDT 0.00 knots Slack
Wed -- 09:39 AM EDT 1.46 knots Max Flood
Wed -- 12:04 PM EDT Moonset
Wed -- 01:01 PM EDT -0.00 knots Slack
Wed -- 04:16 PM EDT -1.78 knots Max Ebb
Wed -- 07:28 PM EDT 0.00 knots Slack
Wed -- 07:57 PM EDT Sunset
Wed -- 10:01 PM EDT 1.26 knots Max Flood
Wed -- 11:33 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 12:24 AM EDT -0.00 knots Slack
Wed -- 03:46 AM EDT -1.89 knots Max Ebb
Wed -- 06:46 AM EDT Sunrise
Wed -- 06:56 AM EDT 0.00 knots Slack
Wed -- 09:39 AM EDT 1.46 knots Max Flood
Wed -- 12:04 PM EDT Moonset
Wed -- 01:01 PM EDT -0.00 knots Slack
Wed -- 04:16 PM EDT -1.78 knots Max Ebb
Wed -- 07:28 PM EDT 0.00 knots Slack
Wed -- 07:57 PM EDT Sunset
Wed -- 10:01 PM EDT 1.26 knots Max Flood
Wed -- 11:33 PM EDT Moonrise
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 |
| 0.2 | -0.4 | -1.2 | -1.8 | -1.9 | -1.5 | -0.8 | 0 | 0.8 | 1.3 | 1.4 | 1 | 0.6 | 0 | -0.8 | -1.4 | -1.8 | -1.7 | -1.1 | -0.3 | 0.4 | 1 | 1.3 | 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)
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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. |