Sunday, August9, 2020
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Marine Weather and Tides
Meggett, SC

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:38AMSunset 8:11PM Sunday August 9, 2020 4:05 AM EDT (08:05 UTC) Moonrise 10:47PMMoonset 11:01AM Illumination 72% Phase: Waning Gibbous; Moon at 20 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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AMZ330 Charleston Harbor- 324 Am Edt Sun Aug 9 2020
Today..S winds 5 to 10 kt. A chance of showers and tstms this afternoon.
Tonight..SW winds 5 to 10 kt. A chance of showers and tstms, mainly in the evening.
Mon..SW winds 5 kt. A chance of showers and tstms.
Mon night..SW winds 5 kt. A chance of showers and tstms.
Tue..S winds 5 kt. A chance of showers and tstms.
Tue night..S winds 5 kt. A chance of showers and tstms.
Wed..S winds 5 to 10 kt. A chance of showers and tstms.
Wed night..S winds 5 to 10 kt. A chance of showers and tstms.
Thu..S winds 5 to 10 kt. A chance of showers and tstms.
Thu night..S 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 324 Am Edt Sun Aug 9 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. The region will remain positioned between atlantic high pressure centered offshore, and an inland area of broad low pressure.


7 Day Forecast for Marine Location Near Meggett, SC
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location: 32.7, -80.28     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 090519 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 119 AM EDT Sun Aug 9 2020

SYNOPSIS. A stationary front will linger to the west through the weekend before dissipating. The region will then be positioned between Atlantic high pressure centered offshore and an inland area of broad low pressure.

NEAR TERM /UNTIL 6 AM THIS MORNING/. A flare up of convection has developed across southern and eastern portions of the Charleston Tri-County area. On this update took this convection and transitioned it into the coastal waters over the next few hours. Other than adding low chnace POPs next several hours, only cosmetic changes were made to the forecast for the rest of the night.

SHORT TERM /6 AM THIS MORNING THROUGH TUESDAY/. Sunday: Short term guidance indicates that the axis of a H5 trough will ripple over the forecast area during the afternoon and evening. At the sfc, the CWA will remain between high pressure centered over the western Atlantic and a trough just east of the Fall Line. A sea breeze should develop during the late morning, sliding inland during the afternoon and evening hours. HREF indicates that showers and thunderstorms will develop along and west of the sea breeze and ahead of the H5 trough. Thunderstorms coverage appears the greatest during the late afternoon into the early evening, PoPs generally ranging between 50-70 percent. Given the broad area of llvl convergence and PW around 2 inches, high resolution guidance indicates that some areas could see rainfall amounts exceed 2 inches. High temperatures are forecast to range from around 90 along the coast to the mid 90s across inland GA. Peak Heat index may favor values around 105 degrees over the coastal counties. Convection should generally dissipate during the late evening hours. Low temperatures are forecast to range from the upper 70s along the coast to the mid 70s inland.

Monday and Tuesday: The mid level trough will remain over the region and ridging builds to the west. The sfc pattern should support the formation of a sea breeze both days. Given a broad field of instability and deep moisture, the environment should yield scattered to numerous thunderstorms each afternoon. High temperatures are forecast to range from 90 near the coast to mid 90s inland.

LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/. Little change in the large scale pattern, with a deep layer Atlantic ridge situated to the east and deep layer trough of low pressure well to the west. Global models show that an upper trough may try to sharpen well to the west during this period, as well as an increase in deep layer moisture. With this combination, guidance continues to show likely afternoon/early evening PoPs each day. A little uncomfortable going with such high PoPs this far out, but blended PoPs have been consistently high, and those PoPs collaborate well with surrounding offices. Highs will continue near normal, around 90 to the lower 90s. Lows in the lower to mid 70s.

AVIATION /06Z SUNDAY THROUGH THURSDAY/. Added a period of VCTS to KCHS to start the TAF forecast period due to convection that recently develop. This convection will be transitioning away from the terminal by 08Z. Then VFR conditions should prevail at both sites through 00z Monday. Could again see thunderstorm development near the terminals Sunday afternoon and evening, but for now only included VCTS at KSAV.

Extended Aviation Outlook: Scattered to numerous thunderstorms will develop over the Coastal Plain each afternoon and evening. It is possible that brief flight restrictions could occur with the passage of any thunderstorm. Areas of heavy rain could see fog or stratus develop during the pre-dawn hours.

MARINE. Tonight: SSW to SW winds around 10 kt are expected. Seas will be around 2 ft. There will be a threat for showers and thunderstorms, initially over the nearshore waters off the Charleston County coast, but then possible in most other areas late.

Sunday through Wednesday: The sfc pattern will feature high pressure centered over the western Atlantic and broad low pressure inland. This pattern should generally support south winds between 10 to 15 kt and seas between 1-2 ft.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . None.



NEAR TERM . MTE SHORT TERM . NED LONG TERM . RFM AVIATION . MTE MARINE . MTE/NED


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 13 mi81 min Calm 77°F 1021 hPa76°F
CHTS1 20 mi48 min SW 2.9 G 5.1 80°F 86°F1020.4 hPa
FBIS1 - Folly Island, SC 21 mi66 min WSW 1.9 G 2.9 78°F 1020.8 hPa
41033 30 mi58 min W 12 G 16 84°F 86°F1019.9 hPa
41029 - Capers Nearshore (CAP 2) 35 mi58 min W 9.7 G 16 83°F 84°F1019.7 hPa
FPKG1 - 8670870 - Fort Pulaski, GA 57 mi48 min W 5.1 G 6 80°F 85°F1021.2 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC15 mi71 minN 010.00 miPartly Cloudy73°F71°F94%1020.3 hPa
Charleston, Charleston Air Force Base, SC20 mi70 minN 010.00 miPartly Cloudy78°F73°F87%1020.2 hPa
Walterboro Lowcountry Regional Airport, SC24 mi71 minN 010.00 miFair73°F73°F100%1021 hPa

Link to 5 minute data for KJZI

Wind History from JZI (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmS7S5S8S8S6SE7S9S8S8S6CalmS5CalmS5SW4SW7CalmCalm
1 day agoCalmW3--CalmCalm3NE3E6SE6SE65SE6SE7S8S9S9S7Calm--CalmCalmCalmCalmCalm
2 days agoS4S5CalmS3S6SW4
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Tide / Current Tables for Lower Toogoodoo Creek, 2 mi. above entrance, South Carolina
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Lower Toogoodoo Creek
Click for Map
Sun -- 01:40 AM EDT     6.61 feet High Tide
Sun -- 06:40 AM EDT     Sunrise
Sun -- 07:16 AM EDT     0.84 feet Low Tide
Sun -- 12:01 PM EDT     Moonset
Sun -- 02:05 PM EDT     6.49 feet High Tide
Sun -- 07:34 PM EDT     1.54 feet Low Tide
Sun -- 08:11 PM EDT     Sunset
Sun -- 11:46 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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66.56.65.94.631.60.911.93.24.55.56.26.56.25.13.82.51.71.62.23.24.3

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Sun -- 12:35 AM EDT     -0.00 knots Slack
Sun -- 04:00 AM EDT     -1.86 knots Max Ebb
Sun -- 06:39 AM EDT     Sunrise
Sun -- 07:11 AM EDT     0.00 knots Slack
Sun -- 09:37 AM EDT     1.42 knots Max Flood
Sun -- 11:59 AM EDT     Moonset
Sun -- 01:07 PM EDT     -0.00 knots Slack
Sun -- 04:25 PM EDT     -1.68 knots Max Ebb
Sun -- 07:40 PM EDT     0.00 knots Slack
Sun -- 08:09 PM EDT     Sunset
Sun -- 09:59 PM EDT     1.21 knots Max Flood
Sun -- 11:45 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.4-0.3-1.1-1.7-1.9-1.6-0.9-0.20.71.31.410.60.1-0.7-1.3-1.6-1.6-1.1-0.50.20.91.21

Weather Map
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wmap_A
GEOS 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 (4,6,7,8)
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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 numerous 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.