Sunday, May28, 2017 L-36.com


Marine Weather and Tides
Barnwell, SC

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:17AMSunset 8:31PM Sunday May 28, 2017 6:35 AM EDT (10:35 UTC) Moonrise 8:16AMMoonset 10:32PM Illumination 9% Phase: Waxing Crescent; Moon at 3 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- 328 Am Edt Sun May 28 2017
Today..W winds 5 to 10 kt...becoming sw 15 to 20 kt.
Tonight..SW winds 15 to 20 kt...diminishing to 5 to 10 kt after midnight.
Mon..W winds 5 to 10 kt...becoming sw 15 kt in the afternoon. A slight chance of showers and Thunderstorms in the afternoon.
Mon night..SW winds 15 kt...diminishing to 5 kt after midnight. A slight chance of showers and Thunderstorms in the evening.
Tue..SW winds 5 to 10 kt. A chance of showers and Thunderstorms in the afternoon.
Tue night..SW winds 5 to 10 kt. A chance of showers and Thunderstorms in the evening.
Wed..SW winds 5 to 10 kt. A chance of showers and Thunderstorms.
Wed night..S winds 5 to 10 kt. A chance of showers and Thunderstorms.
Thu..SW winds 5 to 10 kt. A chance of showers and Thunderstorms.
Thu night..S winds 5 to 10 kt. A slight chance of showers and Thunderstorms. Mariners are reminded that winds and waves can be higher in and near tstms. Unless otherwise noted...waves 1 foot or less. Charleston harbor water temperature...77 degrees.
AMZ300 328 Am Edt Sun May 28 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will linger over the region today. A weak cold front will gradually sag south through the area Monday through Wednesday...then lift back north late 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 280725
afdcae
area forecast discussion
national weather service columbia sc
325 am edt Sun may 28 2017

Synopsis
Ridging over the region will weaken on Sunday as a frontal
boundary slowly slides into the area. The front will stall over
the area early this week providing chances of showers and
thunderstorms each day through Saturday.

Near term through tonight
Upper ridge to our south, with upper trough over the central
conus. A series of upper impulses will move east, tracking mainly
just to our north. Surface wave over nc with surface
front trough stretching back to the west, appears will generally
remain in place due to nearly parallel flow aloft. Combination
of better moisture, upper energy and surface boundary providing
focus for clusters of thunderstorms along this area. Activity
is dissipating as it approaches our fa due to a drier and more
capped atmosphere. In the near term, most high resolution model
output generally suggests that cluster of thunderstorms to our
wnw will gradually weaken as the activity shifts to the ese,
remaining outside our fa. Some varying solutions in latest high
resolution models regarding convection later today. Old outflow
boundaries from previous convection could prove important today
as far as a focusing mechanism for convection, with some
uncertainty on placement and timing. Cloud cover from previous
convection could also affect convective potential. Atmospheric
moisture is expected to increase some over our fa with some
weakening of the mid level cap expected. Strong instability and
considerable deep layer shear forecast today. Mid level cap
still evident in soundings but not as strong as yesterday.

Temperatures expected in the lower 90s to support isolated to
scattered convection with a severe threat. Damaging winds appear
to be the primary threat given freezing level around 15kft and
fairly unidirectional hodographs. SPC has fa in a mrgl risk for
severe. Used a model blend on pops, which provides generally
slight chance south to chance central and north fa.

Short term Monday through Monday night
Upper level ridge will remain to our south, with upper trough to
our north. Westerly flow aloft with embedded impulses. Surface
low pressure well to our N NE will shift farther NE and bring
down a weak surface boundary slightly farther south into the
northern central fa, along with some continued increase in
moisture. Model blend yields chance pops. Strong instabilities
Monday will provide a severe threat. SPC has region in slgt risk
for severe Monday.

Long term Tuesday through Saturday
No changes made to the ongoing forecast for this time period.

Previous discussion follows: models are in good agreement
through the long term with some differences in location on
Friday and Saturday. Frontal boundary will remain stalled over
the region through the period with potential for convection each
day. Tuesday currently presents some concern as instability
will be moderate... Pwat values around 1.6 inches and SPC slight
risk for the area. Chances of convection will continue Wednesday
through Saturday... However with the front becoming more diffuse
across the region potential for severe convection is currently
lower. Temperatures will be near to slight above normal with
afternoon highs in the mid 80s to low 90s and overnight lows in
the mid 60s to around 70.

Aviation 07z Sunday through Thursday
Vfr conditions generally expected through the 24 hr forecast
period.

Another 25 knot low level jet is forecast which along with
convective debris clouds should limit fog development. A light
southwest wind should prevail through the predawn hours and then
pick up to around 10 to 12 knots with gusts to 20 knots
possible after 16z.

A frontal boundary will approach the forecast area on Sunday
bringing a chance of showers and thunderstorms, although the
best chance will be north of the TAF sites, so have not included
mention for now.

Extended aviation outlook... A cold front will stall in the
region through early next week. The front will help support
scattered thunderstorms and associated restrictions.

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 mi55 min S 1.9 G 4.1 66°F
LMFS1 - Lake Murray SC 61 mi75 min SW 8.9 G 9.9 75°F 1009.5 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Barnwell Regional Airport, SC2 mi40 minN 010.00 miFair70°F66°F88%1011.8 hPa

Wind History from BNL (wind in knots)
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Last 24hrSW3W5W4SW9W8
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CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3
1 day agoCalmW5NW5W5W8W7
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W9W75CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoSW7SW8SW9SW10
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--W10
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W11W6SW6SW5SW4CalmCalmW3CalmCalmCalmCalm

Tide / Current Tables for Cuckolds Creek, Combahee River, South Carolina
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Cuckolds Creek
Click for Map
Sun -- 03:12 AM EDT     4.49 feet High Tide
Sun -- 06:16 AM EDT     Sunrise
Sun -- 09:15 AM EDT     Moonrise
Sun -- 09:17 AM EDT     -1.61 feet Low Tide
Sun -- 03:47 PM EDT     3.69 feet High Tide
Sun -- 08:23 PM EDT     Sunset
Sun -- 09:29 PM EDT     -1.64 feet Low Tide
Sun -- 11:28 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.73.14.14.54.33.42.10.6-0.8-1.6-1.4-0.60.71.92.93.53.73.22.20.9-0.5-1.5-1.5-0.8

Tide / Current Tables for Tulifiny River, I-95 bridge, South Carolina
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Tulifiny River
Click for Map
Sun -- 01:50 AM EDT     6.54 feet High Tide
Sun -- 06:18 AM EDT     Sunrise
Sun -- 08:33 AM EDT     -0.66 feet Low Tide
Sun -- 09:16 AM EDT     Moonrise
Sun -- 02:26 PM EDT     5.38 feet High Tide
Sun -- 08:24 PM EDT     Sunset
Sun -- 08:44 PM EDT     -0.66 feet Low Tide
Sun -- 11:29 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.26.36.56.153.620.5-0.5-0.60.41.93.54.75.35.34.73.62.20.7-0.4-0.60.21.8

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Columbia, SC (6,6,7,8)
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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 numerious 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.