Tuesday, March28, 2017 L-36.com


Marine Weather and Tides
Awendaw, SC

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:09AMSunset 7:38PM Tuesday March 28, 2017 11:16 PM EDT (03:16 UTC) Moonrise 6:42AMMoonset 7:26PM Illumination 3% Phase: Waxing Crescent; Moon at 2 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- 954 Pm Edt Tue Mar 28 2017
Overnight..SW winds 5 to 10 kt.
Wed..NW winds 5 kt...becoming E in the afternoon.
Wed night..E winds 5 to 10 kt.
Thu..E winds 5 to 10 kt...increasing to 15 kt in the afternoon. A slight chance of showers in the afternoon.
Thu night..E winds 10 kt. A slight chance of tstms. A chance of showers...mainly after midnight.
Fri..SE winds 10 kt...becoming S with gusts to 20 kt in the afternoon. Showers likely with a chance of tstms.
Fri night..SW winds 15 kt...diminishing to 5 to 10 kt after midnight. Showers likely with a chance of tstms in the evening... Then a chance of showers with a slight chance of tstms after midnight.
Sat..W winds 5 to 10 kt.
Sat night..NW winds around 5 kt.
Sun..NE winds 5 kt.
Sun night..SE winds 5 kt. 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...64 degrees.
AMZ300 954 Pm Edt Tue Mar 28 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A weak front will stall over or near the area Wednesday, then move north as a warm front Thursday night. A cold front will move through Friday night followed by dry high pressure into Sunday. Unsettled weather could return as soon as next Monday.

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 290159
afdchs
area forecast discussion
national weather service charleston sc
959 pm edt Tue mar 28 2017

Synopsis
A weak front will stall over or near the area Wednesday, then move
north as a warm front Thursday night. A cold front will move through
Friday night followed by dry high pressure into Sunday. Unsettled
weather could return as soon as next Monday.

Near term /until 6 am Wednesday morning/
Adjusted current temperatures down a bit in the north and up a
bit in the south per recent observations. Still think overnight
lows should mainly be in the upper 50s north and west to the mid
60s along the georgia coast. Skies should remain mainly clear
overnight. The back door cold front currently across northern
south carolina will move south into northern areas late.

Short term /6 am Wednesday morning through Friday/
A cold front will push southward through the area on Wednesday,
pushed by high pressure to our north. Drier air and minimal synoptic
forcing will yield mainly dry conditions with this front, although
we still can't rule out a few light showers near the altamaha river,
which will be closer to the stalled front. The weather should be dry
until later Thursday when deeper moisture returns and isentropic
ascent increases across the area. The front will move northward as a
warm front Thursday night. Thus, showers and possibly a few
thunderstorms (mainly across ga) are expected. Focus remains on
Friday. Moisture keeps increasing ahead of a cold front that will
approach from the west. Although wind fields will be strengthening,
instability isn't overly impressive. The models have backed off on
the intensity and strength of the front, especially as it
approaches our area during the day. The threat for severe weather is
low at this time. Either way it should be a breezy day with gusts up
to around 25 mph.

Temperatures should push into the lower to mid 80s most inland
locales Wednesday, with some upper 80s possible given the offshore
flow and frontal compression. On Thursday, high pressure building
from the north will keep it a bit cooler, especially across sc where
it should stay below 80 degrees except close to the savannah river.

Once again wouldn't be surprised if upper 80s occurred Thursday
toward inland portions of the altamaha river closer to the stalled
front. Temperatures Friday will be moderated by the clouds/rain,
likely only reaching close to 80 inland. Prevailing onshore winds
will keep coastal locations much cooler during the daytime through
the period.

Long term /Friday night through Tuesday/
A cold front will push through Friday night into Saturday followed
by drier high pressure Sunday. Unsettled weather could return early
next week as a storm system moves across the deep south, although
there remains significant uncertainty regarding the timing of best
rain chances. Highest confidence in rain will be the first part of
Friday night when showers, and possibly some thunderstorms, are
expected. Temperatures should remain above normal through the
period.

Aviation /02z Wednesday through Sunday/
Vfr.

Extended aviation outlook: flight restrictions are possible
Wednesday night into Thursday morning due to low clouds and/or fog,
then likely due to showers/thunderstorms/low clouds Thursday night
into Friday.

Marine
Decreasing winds/seas tonight as the pressure gradient weakens
and a weak front approaches from the north.

Wednesday through Sunday: a weak cold front will move into the area
Wednesday as high pressure builds to the north. The front may stall
over or just souther of our ga waters Wednesday night, before moving
back north through our area as a warm front Thursday night. A cold
front will then move through late Friday, followed by high pressure
for the weekend.

Small craft advisories for winds and seas will probably start across
the ga waters Thursday night, expanding northward into the sc waters
through Friday and Friday night.

Rip currents: moderate risk for rip currents along the sc coast
Wednesday. Gusty winds and long period 3 foot swells will likely
produce rip currents. The combination of higher than normal tides,
onshore winds and swells in the surf zone will support an enhanced
risk for rip currents, possibly lasting into Friday.

Tides/coastal flooding
Strengthening onshore winds combined with swells impacting the coast
will cause saltwater inundation, especially in vulnerable coastal
areas. The Wednesday evening high tide could reach advisory levels,
while the Thursday evening high tide could approach warning levels.

Coastal flood headlines are expected with each of these tide cycles.

Additionally, some coastal flooding could occur with the Friday
evening high tide cycle.

Chs watches/warnings/advisories
Ga... None.

Sc... None.

Marine... None.

Near term... Mte
short term... Ms
long term... Rjb
aviation... Mte
marine... Mte
tides/coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41029 - Capers Nearshore (CAP 2) 10 mi188 min SW 16 G 19 66°F 1013.1 hPa
CHTS1 17 mi46 min SW 6 G 8 67°F 64°F1014.7 hPa
FBIS1 - Folly Island, SC 21 mi76 min SW 8.9 G 11 66°F 1015.1 hPa (+0.7)62°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 38 mi91 min WSW 6 69°F 1013 hPa62°F
41004 - EDISTO - 41 NM Southeast of Charleston, SC 43 mi86 min WSW 12 G 14 70°F 71°F5 ft1013.8 hPa (+1.5)67°F
ACXS1 - ACE Basin Reserve, SC 49 mi91 min Calm 67°F 1014 hPa64°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 mi21 minSSW 510.00 miFair68°F62°F83%1014.9 hPa
Charleston, Charleston Air Force Base, SC19 mi80 minSW 510.00 miFair66°F62°F87%1014.2 hPa
Charleston Executive Airport, SC24 mi21 minSSW 810.00 miFair68°F62°F83%1014.9 hPa

Wind History from LRO (wind in knots)
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Last 24hrCalmS5S5S6S4S5CalmS6SW7SW11SW9
G15
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W9SW8SW9S14S12S12S10S8
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1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS4S9S9S6S9S13
G16
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S10S5S7S5Calm
2 days agoCalmCalmSE3CalmSE3CalmCalmCalmCalmCalmCalmSE7SE9S7S9S9
G15
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G15
SE6CalmSE4Calm

Tide / Current Tables for Moores Landing, ICWW, Sewee Bay, South Carolina
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Moores Landing
Click for Map
Tue -- 03:00 AM EDT     -0.58 feet Low Tide
Tue -- 07:11 AM EDT     Sunrise
Tue -- 07:42 AM EDT     Moonrise
Tue -- 09:13 AM EDT     5.63 feet High Tide
Tue -- 03:20 PM EDT     -0.67 feet Low Tide
Tue -- 07:36 PM EDT     Sunset
Tue -- 08:25 PM EDT     Moonset
Tue -- 09:32 PM EDT     6.04 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.51-0.1-0.6-0.11.12.74.15.15.65.44.53.11.50.2-0.6-0.50.62.345.25.965.2

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Tue -- 12:22 AM EDT     -3.00 knots Max Ebb
Tue -- 03:23 AM EDT     0.00 knots Slack
Tue -- 05:54 AM EDT     2.12 knots Max Flood
Tue -- 07:12 AM EDT     Sunrise
Tue -- 07:43 AM EDT     Moonrise
Tue -- 09:37 AM EDT     -0.00 knots Slack
Tue -- 12:45 PM EDT     -3.02 knots Max Ebb
Tue -- 03:41 PM EDT     0.00 knots Slack
Tue -- 06:14 PM EDT     2.28 knots Max Flood
Tue -- 07:37 PM EDT     Sunset
Tue -- 08:25 PM EDT     Moonset
Tue -- 09:56 PM EDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.9-2.8-1.8-0.50.81.82.11.81.40.7-0.5-1.8-2.8-3-2.3-10.41.62.32.11.61-0.1-1.5

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 Charleston, SC (23,6,7,8)
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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.