Saturday, July4, 2020
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Marine Weather and Tides
Yemassee, 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 6:20AMSunset 8:34PM Saturday July 4, 2020 12:34 AM EDT (04:34 UTC) Moonrise 7:26PMMoonset 4:37AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 1100 Pm Edt Fri Jul 3 2020
Overnight..S winds 5 kt. Seas 2 ft.
Sat..N winds 5 kt, becoming se in the afternoon. Seas 2 ft.
Sat night..SE winds 10 kt, becoming S after midnight. Seas 2 ft.
Sun..SE winds 5 kt, becoming E in the afternoon. Seas 2 ft.
Sun night..SE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Mon..SE winds 5 kt, increasing to 10 kt in the afternoon. Seas 2 ft. Showers and tstms likely.
Mon night..S winds 10 kt. Seas 2 to 3 ft. Showers and tstms likely, mainly in the evening.
Tue..SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Tue night..SW winds 10 kt. Seas 2 ft. A chance of showers and tstms.
Wed..SW winds 10 kt. Seas 2 ft. A chance of showers and tstms.
Wed night..SW winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 1100 Pm Edt Fri Jul 3 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A stationary front will linger south of the area into this weekend. A coastal low will then bring unsettled weather to the region during the early to middle part of next week.


7 Day Forecast for Marine Location Near Yemassee, SC
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location: 32.68, -80.74     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 032338 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 738 PM EDT Fri Jul 3 2020

SYNOPSIS. A stationary front will linger south of the area into this weekend. A coastal low will then bring unsettled weather to the region during the early to middle part of next week.

NEAR TERM /UNTIL 6 AM SATURDAY MORNING/. Very isolated showers have popped up across southern SC just behind the sea breeze. These will be short-lived due to the loss of diurnal heating.

Tonight: A stationary front will be located to our south while a weak high will be over our area. The high will bring us dry conditions, and calm winds inland. Though, some high clouds could stream in from the distant front. Temperatures will be in the 70s.

SHORT TERM /6 AM SATURDAY MORNING THROUGH MONDAY/. On Independence Day, the sfc pattern should feature a stationary front running along the Gulf Coast and northern FL with weak high pressure ridging inland across SE GA and SC. This pattern should support steady SE winds during through much of the daylight hours. A sea breeze is expected to develop during the early afternoon, slowly advancing inland during the afternoon and evening. Forecast soundings indicated weak instability with a thin layer of CIN lingering into the mid to late afternoon. Given the timing of the sea breeze and weak instability, isolated showers and thunderstorms are possible during the mid to late afternoon. High temperatures are forecast to range from the mid 90s inland to around 90 along the coast. Isolated convection should end during the early evening. Low temperatures should remain within the low to mid 70s.

A broad mid-level trough will remain across the lower Mississippi Valley on Sunday. A frontal wave is forecast to develop over the Mississippi Delta, resulting in the front from AL to FL to lift slowly north. Deeper moisture and instability is expected to increase over SE GA Sunday afternoon. Also, steady SE winds should result in a slow sea breeze advancing inland during the afternoon. The forecast will feature scattered showers and thunderstorms across extreme SE GA with isolated convection along and west of the sea breeze. Temperatures should generally range in the low 90s.

The plume of moisture that has remained over the Deep South is expected to lift north across the forecast area Sunday night into Monday. A weak front should approach from the south on Monday, perhaps serving as a focus for convection. The combination of the deep moisture, weak to moderate instability, and the approaching front should yield at least numerous showers and thunderstorms during the daylight hours Monday. High temperatures will likely be limited by thick cloud cover and the high coverage of convection, most areas in the mid to upper 80s.

LONG TERM /MONDAY NIGHT THROUGH FRIDAY/. A more unsettled pattern is expected for the long term period. An area of low pressure is forecast to lift from the Gulf Coast states into or near the area through mid-week. The low will linger in the vicinity through Thursday. Details are yet to be determined as there is discrepancy between models regarding the location of the low, however the highest rain chances appear to be Tuesday and Wednesday. Will need to look out for the potential for flooding. High temperatures are forecast to be a few degrees below normal with clouds and rain around, while lows are forecast to stay slightly above normal.

AVIATION /00Z SATURDAY THROUGH WEDNESDAY/. VFR.

Extended Aviation Outlook: VFR is expected through much of the weekend. The chance for flight restrictions in showers/thunderstorms will increase early next week.

MARINE. Tonight: A stationary front will be located to our south while a weak high will be over our area. Expect mostly SE winds across the GA waters while the SC waters should see SE winds in the evening, veering to the SW by daybreak Saturday. Sustained winds will be no more than 10 kt with seas averaging 1-2 ft.

Saturday through Wednesday: A stalled front will linger south of the waters this weekend, lifting north across the waters by Monday. Low pressure is then expected to impact the region towards the middle of the week. There is low forecast confidence with the position and strength of the low pressure during the mid-week. At this point, marine conditions are forecast to stay below Small Craft Advisory criteria through the period.

TIDES/COASTAL FLOODING. A Coastal Flood Advisory is now in effect for the SC coast with this evenings high tide. Tide anomalies have been trending up the past 24 hours. With onshore winds expected this afternoon the anomalies should be around 1 ft. The tide should peak near 7.5 MLLW for Downtown Charleston, which is in the Moderate Flood category.

Astronomical influences will maintain higher than normal tide levels into early next week. Minor coastal flooding will be possible around the time of the evening high tides, primarily along the South Carolina coast. In addition, the risk for heavy rain will only add to any tidal flooding early next week.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . Coastal Flood Advisory until 9 PM EDT this evening for SCZ048>050. MARINE . None.

NEAR TERM . JRL SHORT TERM . LONG TERM . ETM AVIATION . JRL MARINE . TIDES/COASTAL FLOODING .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 17 mi49 min Calm 77°F 1014 hPa74°F
41033 33 mi26 min SSW 5.8 G 9.7 81°F 82°F1013.5 hPa
CHTS1 44 mi46 min SSW 1.9 G 2.9 81°F 84°F1013.7 hPa
FBIS1 - Folly Island, SC 45 mi34 min SSW 6 G 6 81°F 1014.2 hPa (+0.4)
FPKG1 - 8670870 - Fort Pulaski, GA 45 mi46 min SE 1.9 G 2.9 80°F 83°F1014.1 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort, Marine Corps Air Station, SC14 mi98 minWSW 310.00 miFair78°F73°F85%1013.5 hPa
Walterboro Lowcountry Regional Airport, SC17 mi59 minN 010.00 miFair73°F71°F94%1014.2 hPa
Beaufort County Airport, SC19 mi59 minno data7.00 miFair79°F73°F84%1013.5 hPa

Link to 5 minute data for KNBC

Wind History from NBC (wind in knots)
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Last 24hrCalmCalmCalmW3SW3N3CalmN5NE4NE6E7E6E63E6S5SE4S7S7S6SE64W3SW3
1 day agoSW5SW6W7SW6W6SW5W6SW5W8W4NW4W5W8NW7W7W6W4W6W6NE16
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2 days agoCalmSW4SW3CalmCalmW6W6W9W7W5W8W10SW4SW9W9W10W11W8W11
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Tide / Current Tables for Bluff Plantation, Combahee River, South Carolina
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Bluff Plantation
Click for Map
Sat -- 05:37 AM EDT     Moonset
Sat -- 06:03 AM EDT     -0.17 feet Low Tide
Sat -- 06:20 AM EDT     Sunrise
Sat -- 11:58 AM EDT     3.10 feet High Tide
Sat -- 06:04 PM EDT     -0.25 feet Low Tide
Sat -- 08:25 PM EDT     Moonrise
Sat -- 08:34 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.73.42.81.910.2-0.200.71.52.32.93.12.92.31.60.80.1-0.2-00.61.52.53.2

Tide / Current Tables for Sheldon, Huspa Creek, Whale Branch, South Carolina
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Sheldon
Click for Map
Sat -- 04:05 AM EDT     -0.37 feet Low Tide
Sat -- 05:37 AM EDT     Moonset
Sat -- 06:20 AM EDT     Sunrise
Sat -- 10:04 AM EDT     8.12 feet High Tide
Sat -- 04:05 PM EDT     -0.53 feet Low Tide
Sat -- 08:25 PM EDT     Moonrise
Sat -- 08:34 PM EDT     Sunset
Sat -- 10:41 PM EDT     9.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.55.32.70.6-0.40.21.83.967.58.17.66.34.32.20.3-0.501.746.48.49.69.8

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 (0,6,7,8)
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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.