Tuesday, August11, 2020
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Marine Weather and Tides
James, 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 6:39AMSunset 8:10PM Tuesday August 11, 2020 8:18 PM EDT (00:18 UTC) Moonrise 11:46PMMoonset 12:49PM Illumination 44% Phase: Third Quarter Moon; Moon at 23 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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AMZ256 Coastal Waters From Murrells Inlet To South Santee River Sc Out 20 Nm- 318 Pm Edt Tue Aug 11 2020
Through 7 pm..S winds 5 to 10 kt. Seas 2 ft.
Tonight..SW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms after midnight.
Wed..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms, mainly in the morning.
Wed night..S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms in the evening, then showers and tstms likely after midnight.
Thu..S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft. Showers and tstms likely, mainly in the morning.
Thu night..S winds 10 to 15 kt, becoming sw 5 to 10 kt after midnight. Seas 3 to 4 ft. Showers and tstms.
Fri..SW winds 5 to 10 kt. Seas 2 to 3 ft. Showers and tstms.
Fri night..SW winds 5 to 10 kt. Seas 3 to 4 ft. Showers and tstms likely, mainly in the evening.
Sat..SW winds 5 to 10 kt. Seas 3 to 4 ft. Showers and tstms likely
Sun...w winds 5 kt, becoming sw in the afternoon and evening, then becoming nw after midnight. Seas 2 to 3 ft. A chance of showers and tstms. Winds and seas higher in and near tstms.
AMZ200 318 Pm Edt Tue Aug 11 2020
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. Bermuda high will remain over the western atlantic this week, while a trough of low pressure lingers over the southeast. A weak front may move into the region for the end of the week.


7 Day Forecast for Marine Location Near James, SC
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location: 33.31, -79.68     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 120001 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 801 PM EDT Tue Aug 11 2020

SYNOPSIS. The region will remain positioned between Atlantic high pressure well to the east and inland low pressure. A weak cold front could approach the area over the weekend and linger in the vicinity into early next week.

NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/. Early this evening: Mostly scattered coverage of thunderstorms this evening, primarily impacting southeast Georgia. Most of the activity has been fairly weak, except for one storm that has pulsed up with 60+ dBZ over the -20 C height (nearly 27 kft) and over 100 knots of storm top divergence. This storm is currently warned for and will be impacting Fort Stewart and the Hinesville area. Otherwise, storms are progressing from north to south and should stay just in the scattered coverage range through the rest of the evening. Focus for convection will then shift to the coastal waters yet again and rain chances have been constructed to reflect this. Overall, no significant fog or stratus concerns.

SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY/. A broad, deep layer trough remains inland with a Atlantic high pressure to the east-southeast. South-southwest low-level flow is expected to become onshore near the coast each afternoon due to the sea breeze. The sea breeze and convective outflow boundaries will be the main focus for any showers and thunderstorms. Generally chance to low-end likely PoPs are forecast for the afternoon and early evening showers and thunderstorms each day with an isolated strong to severe thunderstorm possible. Upper level flow remains weak and will continue to result in slow-moving or virtually stationary storms. With plenty of deep layer moisture and PWATs near 2 inches, some storms could produce locally heavy rainfall. High temperatures remain in the normal range, mostly in the lower 90s with upper 80s on Friday. Overnight lows in the lower to mid 70s, except upper 70s along the immediate coast.

LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/. Models continue to lack consistency in the long term period. Broad troughing aloft appears to shift towards the East Coast over the weekend into early next week. At the surface, a weak front could approach the region and then linger over or near the area. This setup will generally favor higher than normal rain chances, although given a good amount of disagreement between models, refinements will be needed. Temperatures will be near climo.

AVIATION /00Z WEDNESDAY THROUGH SUNDAY/. VFR conditions should prevail at KCHS and KSAV through 00z Thursday. Through the rest of the evening, thunderstorms should stay just west of KSAV, though it is possible for one to pass within the vicinity. No concerns at KCHS. We expect additional thunderstorms Wednesday afternoon, but it is too early to introduce any thunder into the TAF's.

Extended Aviation Outlook: Flight restrictions possible in showers/thunderstorms each day, mainly in the afternoon/evening.

MARINE. Tonight: No significant concerns as far as winds/seas but some stronger storms could cause locally hazardous conditions mainly after midnight.

Wednesday through Saturday: No highlights are expected through the week. The waters will remain between Atlantic high pressure to the east and a broad area of lower pressure well inland. A weak upper low is expected to transition to a mid- level trough and move offshore by early Wednesday where convection could linger offshore. In general, southerly winds of 15 knots or less and seas of 3 feet or less are expected. An afternoon sea breeze will turn winds southerly/onshore near the coast each afternoon. Scattered showers and thunderstorms are expected mainly late night and early morning.

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



NEAR TERM . BSH SHORT TERM . BRM LONG TERM . ETM AVIATION . BSH/BRM MARINE . RJB/BRM


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NIWS1 - North Inlet-Winyah Bay Reserve, SC 26 mi94 min S 6 85°F 1013 hPa75°F
41029 - Capers Nearshore (CAP 2) 35 mi71 min SW 12 G 18 83°F 86°F1013.8 hPa
CHTS1 39 mi49 min SSW 8 G 11 84°F 87°F1014.4 hPa
FBIS1 - Folly Island, SC 45 mi79 min S 13 G 16 83°F 1014.4 hPa (-0.9)
MROS1 - 8661070 - Springmaid Pier, SC 47 mi49 min 82°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Georgetown County Airport , SC19 mi44 minS 310.00 miFair81°F73°F79%1014.6 hPa
Moncks Corner Berkeley County, SC21 mi24 minSSW 710.00 miPartly Cloudy81°F75°F84%1014.2 hPa

Link to 5 minute data for KGGE

Wind History from GGE (wind in knots)
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Last 24hrS4CalmSW4W6CalmCalmCalmCalmCalmCalmCalmCalmNW3W4SW5SW3W3SE4SE8S9
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1 day agoCalmCalmCalmCalmS3CalmCalmW3CalmW4CalmCalmW5CalmS3S6SW4S10S8SE9S5S6S8S6
2 days agoSW4CalmCalmCalmCalmCalmCalmCalmW4W4CalmW3CalmNW3NW3W3W4S10
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Tide / Current Tables for Jamestown Bridge, Santee River, South Carolina
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Jamestown Bridge
Click for Map
Tue -- 12:13 AM EDT     Moonrise
Tue -- 02:05 AM EDT     0.44 feet Low Tide
Tue -- 05:53 AM EDT     1.02 feet High Tide
Tue -- 06:38 AM EDT     Sunrise
Tue -- 12:47 PM EDT     Last Quarter
Tue -- 01:49 PM EDT     Moonset
Tue -- 02:26 PM EDT     0.28 feet Low Tide
Tue -- 06:31 PM EDT     1.11 feet High Tide
Tue -- 08:07 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.50.40.50.81110.90.80.70.50.40.30.30.30.60.91.11.11.110.90.8

Tide / Current Tables for Pleasant Hill Landing, Santee River, South Carolina
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Pleasant Hill Landing
Click for Map
Tue -- 12:12 AM EDT     Moonrise
Tue -- 04:02 AM EDT     2.05 feet High Tide
Tue -- 06:38 AM EDT     Sunrise
Tue -- 11:48 AM EDT     0.64 feet Low Tide
Tue -- 12:47 PM EDT     Last Quarter
Tue -- 01:48 PM EDT     Moonset
Tue -- 04:40 PM EDT     2.23 feet High Tide
Tue -- 08:07 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.31.71.9221.91.61.31.10.80.70.70.91.41.92.22.22.121.81.51.31.2

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 (20,4,5,8)
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Ground Weather Radar Station Wilmington, NC
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weather_mapweather_map weather_map

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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.