Wednesday, August5, 2020
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Marine Weather and Tides
Awendaw, 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 6:35AMSunset 8:15PM Wednesday August 5, 2020 9:02 PM EDT (01:02 UTC) Moonrise 8:51PMMoonset 7:18AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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- 857 Pm Edt Wed Aug 5 2020
Rest of tonight..S winds 5 to 10 kt. A slight chance of showers and tstms.
Thu..S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. A chance of showers and tstms.
Thu night..S winds 5 to 10 kt. A chance of showers and tstms.
Fri..SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. A chance of showers and tstms.
Fri night..S winds 10 kt, diminishing to 5 kt after midnight. A chance of showers and tstms.
Sat..S winds 5 to 10 kt. A chance of showers and tstms.
Sat night..S winds 5 to 10 kt. A chance of showers and tstms.
Sun..S winds 5 kt. A chance of showers and tstms.
Sun night..S winds 5 kt. A chance of showers and tstms.
Mon..S winds 5 kt. A chance of showers and tstms.
Mon night..S winds 5 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 857 Pm Edt Wed Aug 5 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A stationary front will remain over the area through the weekend. Atlantic high pressure will then linger off the coast through early next week.


7 Day Forecast for Marine Location Near Awendaw, SC
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location: 32.94, -79.68     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 052304 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 704 PM EDT Wed Aug 5 2020

SYNOPSIS. A stationary front will remain over the area through the weekend. Atlantic high pressure will then linger off the coast through early next week.

NEAR TERM /UNTIL 6 AM THURSDAY MORNING/. Late afternoon radar and visible satellite imagery shows several well defined convective outflow boundaries with the most prominent one extending from southwest Screven County through northern Effingham County and into Beaufort County at 05/2140z. This boundary will continue to propagates to the south and southwest over the next few hours. The strongest deep layered convergence is progged to setup across far interior Southeast Georgia from Metter to Statesboro up into Sylvania where the atmosphere has yet to be tapped. Pops were increased to 60-70% in this region for the next several hours with the anticipation that additional convection will fire prior to sunset. Most of this activity looks to remain west of the Savannah Metro area, but some sort of activity could approach the city from the west later this evening. The atmosphere has mostly stabilized across the Charleston Tri-County area, but some additional destabilization could occur.

Later tonight, channeled shortwave energy passing through aloft could act to spark additional mostly isolated showers/tstms during the early morning with the better chances occurring along the southern South Carolina coast. Adjusted pops slightly to reflect this trend. Lows will range from the lower 70s well inland to the lower 80s and Downtown Charleston.

SHORT TERM /6 AM THURSDAY MORNING THROUGH SATURDAY/. A mid-level trough will encompass the Great Lakes Region and then shift to the east southeast, encompassing much of the Atlantic Northeast and Southeast through Saturday. As a stationary front remains over the area, moisture will be plentiful and is expected to linger with PWATS around 1.75 to 2.25 inches. Isolated to scattered showers/thunderstorms are expected each afternoon with plentiful instability and along the sea breeze. Overall, any thunderstorms that form are expected to diminish after sunset with the loss of daytime heating. Temperatures will remain near normal and as of now, maximum heat indices are expected to be between 98 and 106 degrees.

LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/. There isn't much change to the weather pattern expected early next week with the continuation of near to above normal POPs and temperatures near normal.

AVIATION /23Z WEDNESDAY THROUGH MONDAY/. VFR. An outflow boundary north of KSAV could spark an isolated tstm near the terminal through 03z, so this will need to be watched. Guidance suggests scattered showers/tstms will develop near or just west of the terminals Thursday, initially near KSAV then near KCHS. Will carry VCTS 14-19z at KSAV, but hold off on any mention KCHS since it appears better rain chances will remain just to the west.

Extended Aviation Outlook: Brief flight restrictions are possible due to showers/thunderstorms, mainly each afternoon and evening.

MARINE. Tonight: Once coastal convection dissipates this evening, winds will return to southerly at 10-15 kt with seas no higher than 4 ft.

Thursday through Monday: Overall, winds will remain generally south. Winds are expected to remain below Small Craft Advisory but could become gusty up to 15 kts along the sea breeze each afternoon and during the nocturnal surge.

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




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41029 - Capers Nearshore (CAP 2) 10 mi55 min ENE 5.8 G 9.7 82°F 84°F1015.9 hPa
CHTS1 17 mi45 min SE 4.1 G 7 83°F 85°F1016.5 hPa
FBIS1 - Folly Island, SC 21 mi63 min SE 4.1 G 5.1 82°F 1016.5 hPa (-0.5)
NIWS1 - North Inlet-Winyah Bay Reserve, SC 38 mi78 min ESE 5.1 81°F 1016 hPa77°F
41004 - EDISTO - 41 NM Southeast of Charleston, SC 43 mi23 min SSE 5.8 G 7.8 82°F 82°F1016.6 hPa79°F
ACXS1 - ACE Basin Reserve, SC 49 mi78 min SE 1.9 84°F 1016 hPa78°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mount Pleasant Regional-Faison Field, SC6 mi68 minN 010.00 miFair81°F75°F84%1015.9 hPa
Charleston, Charleston Air Force Base, SC19 mi67 minESE 410.00 miPartly Cloudy82°F73°F74%1015.8 hPa
Charleston Executive Airport, SC24 mi68 minESE 38.00 miFair82°F77°F84%1015.9 hPa

Link to 5 minute data for KLRO

Wind History from LRO (wind in knots)
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Last 24hr4SE6CalmCalmCalmCalmCalm3CalmCalmCalmCalmS5S653
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1 day agoW13
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SW6S6CalmCalmCalmCalmCalm3Calm535CalmSW6SE6SE7SE8SE8SE83SE5
2 days ago5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE5CalmCalm46
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Tide / Current Tables for Moores Landing, ICWW, Sewee Bay, South Carolina
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Moores Landing
Click for Map
Wed -- 04:01 AM EDT     0.18 feet Low Tide
Wed -- 06:35 AM EDT     Sunrise
Wed -- 08:17 AM EDT     Moonset
Wed -- 10:11 AM EDT     4.95 feet High Tide
Wed -- 04:06 PM EDT     0.21 feet Low Tide
Wed -- 08:13 PM EDT     Sunset
Wed -- 09:50 PM EDT     Moonrise
Wed -- 10:37 PM EDT     5.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.63.21.80.60.20.61.52.73.84.64.94.742.91.70.70.20.51.52.8455.65.6

Tide / Current Tables for Charleston Harbor, off Fort Sumter, South Carolina Current (expired 1996-12-31)
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Charleston Harbor
Click for Map
Wed -- 01:39 AM EDT     -2.56 knots Max Ebb
Wed -- 04:56 AM EDT     0.00 knots Slack
Wed -- 06:36 AM EDT     Sunrise
Wed -- 07:27 AM EDT     1.77 knots Max Flood
Wed -- 08:18 AM EDT     Moonset
Wed -- 10:39 AM EDT     -0.00 knots Slack
Wed -- 01:43 PM EDT     -2.37 knots Max Ebb
Wed -- 04:56 PM EDT     0.00 knots Slack
Wed -- 07:40 PM EDT     2.19 knots Max Flood
Wed -- 08:13 PM EDT     Sunset
Wed -- 09:51 PM EDT     Moonrise
Wed -- 11:09 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.8-2.4-2.5-2.1-1.20.11.21.71.71.40.7-0.4-1.5-2.2-2.3-2-1.20.11.32.12.21.81.20.2

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 (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 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.