Thursday, January23, 2020
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Marine Weather and Tides
Barnwell, 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 7:27AMSunset 5:50PM Thursday January 23, 2020 5:18 AM EST (10:18 UTC) Moonrise 6:33AMMoonset 4:45PM Illumination 3% Phase: Waning Crescent; Moon at 28 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- 326 Am Est Thu Jan 23 2020
Today..NE winds 10 kt.
Tonight..NE winds 5 to 10 kt. A slight chance of showers in the evening, then a chance of showers after midnight.
Fri..SE winds 5 to 10 kt. A chance of showers in the morning, then showers likely with a slight chance of tstms in the afternoon.
Fri night..SW winds 10 kt, becoming W after midnight. Showers likely with a slight chance of tstms in the evening, then a slight chance of showers after midnight.
Sat..W winds 10 kt.
Sat night..W winds 5 to 10 kt.
Sun..W winds 5 kt.
Sun night..W winds 5 kt.
Mon..NW winds 5 kt.
Mon night..NW winds 5 kt. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 53 degrees.
AMZ300 326 Am Est Thu Jan 23 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A storm system will impact the region tonight through Friday night. High pressure will return Saturday and persist into early next week before a weak low pressure system approaches the area during the middle of next week.


7 Day Forecast for Marine Location Near Barnwell, SC
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location: 33.23, -81.36     debug


Area Discussion for - Columbia, SC
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FXUS62 KCAE 230812 AFDCAE

Area Forecast Discussion National Weather Service Columbia SC 312 AM EST Thu Jan 23 2020

SYNOPSIS. There will be increased moisture ahead of a frontal system tonight. The front will be in the region Friday bringing rain to the region and move off the coast Friday night. High pressure will dominate Saturday and Sunday.

NEAR TERM /THROUGH TONIGHT/. Upper ridge axis currently along the east coast, with upper trough over the central CONUS. Surface high pressure ridge, with low level dry air, still in place. A pair of upper disturbances to roll through, one early today and the other tonight. Expect increasing mid and high level cloudiness early today, with some decrease in this cloudiness this afternoon behind the first impulse. Best moisture transport and isentropic lift expected tonight with the second upper disturbance and weak surface wave. Latest guidance indicates precipitation working east into the CSRA this evening or early tonight, with rain spreading east over the remainder of the forecast area overnight. Despite recent cool dry airmass in place, enough air mass modification expected to keep surface temps and wet bulb temps above freezing.

SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/. Widespread rain is expected to be ongoing across much of the forecast area (especially the western half) Friday morning as an upper trough moves into the OH/TN Valleys. The strongest moisture flux will be over the forecast area during the day Friday combining with shortwave energy, difluent 500mb flow, and a 40-50 knot southwesterly low level jet keeping chances of rain in the categorical range through the day.

Hi-res and global models are in good agreement showing the upper trough lifting northeast through the Ohio Valley on Friday evening and bringing a dry slot over the forecast area. This will bring an end to the accumulating rain during the 00z- 06z time frame as PWAT values rapidly decrease below a half inch as the deeper moisture shifts eastward, replaced by dry air in the mid levels. Dry weather is expected on Saturday as 500mb heights slowly rise in broad zonal westerly flow as surface high pressure builds in from the southwest.

Temperatures will generally be near normal during the period with highs ranging from the mid 50s to lower 60s on Friday and then in the mid to upper 50s on Saturday. Overnight lows will be in the upper 30s to lower 40s on Friday night and cooler on Saturday night in the mid 30s.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. Little change to the medium range forecast which features dry weather and seasonal temperatures. The medium range models are generally in fair agreement with the overall pattern showing northern stream shortwave energy phasing with southern stream energy over the lower MS Valley on Sunday and the resulting fast moving upper trough moves across the southeastern states Sunday night and Monday. The GFS is most aggressive and furthest north with the trough and bringing moisture northward from the Gulf which would result in some chances of rain across the southern half of the forecast area. However, this is contrary to its previous runs and an outlier with the other guidance (ECMWF, Canadian) which shows a less amplified upper trough with much less moisture available. After collaboration with neighbor offices will continue to carry a dry forecast for now and wait for better run to run consistency to occur before adding pops to the forecast.

Weak shortwave ridging will move over the region Tuesday providing dry weather but chances of rain return on Wednesday as the next upper trough moves into the middle of the country and southwesterly flow ahead of it brings moisture off the Gulf back into the forecast area. Temperatures during this period will be seasonal and near normal with highs in the 50s to lower 60s and lows in the upper 30s to mid 40s.

AVIATION /08Z THURSDAY THROUGH MONDAY/. VFR today, with deteriorating conditions tonight.

Surface high pressure with dry low level air remaining in place to ensure VFR conditions in the near term. Expect some mid and high level cloudiness ahead of an upper disturbance and surface wave that is expected to bring rain, and deteriorating flight categories, into the forecast area tonight. At this time, will indicate MVFR late in the TAF period. Expecting best chance of rain and lower flight categories after 06Z Fri.

EXTENDED AVIATION OUTLOOK . Showers and associated restrictions Friday. Improving conditions Friday night. No significant impacts expected to aviation Saturday and Sunday.

CAE WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHDS1 - Strom Thurmond Dam, SC 54 mi59 min NNE 6 G 8.9 37°F
LMFS1 - Lake Murray SC 61 mi59 min N 1.9 G 4.1 34°F 1025.4 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Barnwell Regional Airport, SC2 mi24 minNE 710.00 miOvercast37°F23°F56%1025.1 hPa

Link to 5 minute data for KBNL

Wind History from BNL (wind in knots)
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NE11NE106N7N4NE4CalmNE6CalmCalmNE8NE7NE7NE7NE9NE8
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2 days agoN6N5NE7NE15N11NE8N8NE9NW6N8N7N6N4N5N4N6NE3CalmN3N5N5CalmN5N6

Tide / Current Tables for Tulifiny River, I-95 bridge, South Carolina
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Tulifiny River
Click for Map
Thu -- 04:08 AM EST     -0.37 feet Low Tide
Thu -- 06:30 AM EST     Moonrise
Thu -- 07:23 AM EST     Sunrise
Thu -- 10:23 AM EST     5.42 feet High Tide
Thu -- 04:44 PM EST     Moonset
Thu -- 04:53 PM EST     -0.22 feet Low Tide
Thu -- 05:47 PM EST     Sunset
Thu -- 10:30 PM EST     4.67 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.32.31.10.1-0.4-0.10.92.33.74.85.45.34.73.82.51.10.1-0.20.31.42.73.94.64.6

Tide / Current Tables for Cuckolds Creek, Combahee River, South Carolina
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Cuckolds Creek
Click for Map
Thu -- 04:49 AM EST     -0.87 feet Low Tide
Thu -- 06:29 AM EST     Moonrise
Thu -- 07:22 AM EST     Sunrise
Thu -- 11:44 AM EST     3.79 feet High Tide
Thu -- 04:43 PM EST     Moonset
Thu -- 05:34 PM EST     -0.52 feet Low Tide
Thu -- 05:46 PM EST     Sunset
Thu -- 11:51 PM EST     3.27 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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32.31.30.2-0.6-0.9-0.50.31.32.33.23.73.83.42.61.50.4-0.4-0.5-00.81.72.63.1

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 Columbia, SC (5,6,7,8)
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Ground Weather Radar Station Charleston, SC
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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.