Friday, October20, 2017 L-36.com


Marine Weather and Tides
Awendaw, SC

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 7:27AMSunset 6:41PM Friday October 20, 2017 12:21 PM EDT (16:21 UTC) Moonrise 7:05AMMoonset 6:34PM Illumination 0% Phase: New Moon; Moon at 0 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- 1100 Am Edt Fri Oct 20 2017
Rest of today..NE winds 5 to 10 kt, becoming e.
Tonight..E winds 5 kt.
Sat..NE winds 5 kt, becoming E in the afternoon.
Sat night..E winds 5 to 10 kt.
Sun..E winds 5 to 10 kt. A chance of showers.
Sun night..SE winds 5 to 10 kt. A chance of showers.
Mon..SE winds 10 to 15 kt. A chance of showers.
Mon night..S winds 10 kt. Showers likely with a chance of tstms.
Tue..SW winds 10 to 15 kt. A chance of showers and tstms.
Tue night..W winds 10 kt. A slight chance of showers. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 73 degrees.
AMZ300 1100 Am Edt Fri Oct 20 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Strong high pressure will continue over the area, then shift offshore this weekend. A cold front will likely move through Monday night into Tuesday before a stronger cold front moves through Tuesday night ushering in much cooler weather.

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 201449
afdchs
area forecast discussion
national weather service charleston sc
1049 am edt Fri oct 20 2017

Synopsis
Strong high pressure will continue over the area, then shift
offshore this weekend. A cold front will likely move through
Monday night into Tuesday before a stronger cold front moves
through Tuesday night ushering in much cooler weather.

Near term through tonight
Today: at this sfc, dry high pressure will expand across the
southeast united states while slowly shifting east toward the coast.

Aloft, a mid upper lvl ridge of high pressure will continue to
expand from the gulf of mexico before becoming centered over the
southeast united states. The pattern will favor veering winds
from northeast to east this afternoon and slightly warmer conditions
than the previous day. In general, high temps will range in the
lower 80s away from the immediate coast.

Tonight: dry high pressure and clear skies will support a strong
radiational cooling night with decoupling winds. Overnight lows will
likely dip into the low 50s well inland to low mid 60s near the
coast where a light onshore wind prevails.

Short term Saturday through Monday
High pressure should keep conditions warm and dry through Saturday
but a few light showers will be possible Saturday night, mainly
along the ga coast, then moreso across the entire forecast area
Sunday as a coastal trough pushes inland. The trough should move
well inland and dissipate by Sunday night but strengthening low-
level onshore flow and deeper moisture moving in from the west ahead
of an approaching cold front upper trough will cause an increase in
rain chances amounts Monday. Although low-level shear helicity will
be on the increase Monday, instability will likely be marginal and
thus the risk for thunderstorms, and especially severe
thunderstorms, appears to be low at this time. Temperatures will be
above normal through the period.

Long term Monday night through Thursday
A potent upper shortwave and or closed low will affect the area
Monday night into Tuesday, pushing an initial cold front through the
area Monday night into Tuesday. Expect a good chance for showers and
some thunderstorms along and ahead of the cold front, followed by
drier and cooler high pressure. Tuesday should be mainly dry,
although some showers could linger, especially near the sc coast
early in the day. A secondary, stronger cold front will then move
through Tuesday night as the main upper trough envelopes the eastern
u.S.. Dry, but cooler conditions will then prevail through Thursday
before some moderation occurs late in the week as high pressure
quickly shifts offshore allowing a return flow to set up.

Temperatures should stay above normal through Tuesday before falling
at or below normal through Thursday night. Many inland areas should
get into the 40s Thursday Friday mornings.

Aviation 15z Friday through Tuesday
Vfr conditions will prevail at both chs and sav terminals. Light
northeast winds are expected into the afternoon, before shifting to
east between 18z-21z. Shortly after sunset, winds are expected to
decouple, with calm winds expected at sav.

Extended aviation outlook: brief flight restrictions are possible
Sunday due to low clouds showers. Higher chances of flight
restrictions are expected Sunday night through Monday night,
possibly into Tuesday, as a cold front affects the area with heavier
showers and potentially some thunderstorms.

Marine
Today and tonight: sfc high pressure centered north of the area will
shift east off the mid-atlantic coast, helping weaken the pressure
gradient over local waters. As a result, northeast east winds
and seas will steadily decrease throughout the day with conditions
remaining below small craft advisory levels for most waters.

The only exception will be over offshore georgia waters where 6 ft
seas linger into late morning early afternoon hours. For this
reason, a small craft advisory will continue in offshore georgia
waters into early afternoon. Winds seas should be no higher
than 15 kt and 3-4 ft overnight while high pressure prevails.

Saturday through Wednesday: conditions will deteriorate a bit this
weekend as a cold front approaches from the west and likely moves
through early Tuesday. Another stronger cold front will then move
through Tuesday night. A small craft advisory may be needed starting
Saturday night for seas reaching 6 feet beyond 20 nm, then likely
remain into Wednesday.

Rip currents... Steady northeast winds, long period swell from the
east and astronomical influences associated with a recent new moon
should support an elevated risk of rip currents today, mainly
along georgia beaches. A moderate risk of rip currents will
continue for the georgia beaches today.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 2 pm edt this afternoon for amz374.

Near term... Dpb
short term... Rjb
long term... Rjb
aviation... Dpb rjb
marine... Dpb rjb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41029 - Capers Nearshore (CAP 2) 10 mi134 min NNE 12 G 16 68°F 73°F1024.6 hPa
CHTS1 17 mi124 min N 5.1 G 8 74°F 73°F1025.1 hPa
FBIS1 - Folly Island, SC 21 mi142 min N 8 G 8.9 69°F 1025.4 hPa (+1.4)57°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 38 mi157 min N 5.1 66°F 1025 hPa56°F
41004 - EDISTO - 41 NM Southeast of Charleston, SC 43 mi112 min NNE 12 G 14 74°F 80°F1024 hPa64°F
ACXS1 - ACE Basin Reserve, SC 49 mi157 min N 2.9 66°F 1025 hPa59°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 mi47 minN 010.00 miFair75°F60°F61%1025.1 hPa
Charleston, Charleston Air Force Base, SC19 mi86 minNE 810.00 miFair73°F55°F55%1025.1 hPa
Charleston Executive Airport, SC24 mi27 minN 410.00 miFair75°F59°F57%1025.1 hPa

Wind History from LRO (wind in knots)
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Last 24hrNE5N4SE3E3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3N3N3N5N4N4
1 day agoN5N5NE4N3CalmE3CalmCalmCalmCalmN4N3N4N4CalmN5N5N5CalmCalmN5N5N6N4
2 days agoN8
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N8N8NE4NE4N6N3CalmCalmCalmCalmN5N3N4N4N3N5N6N6N6N6N8
G14
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Tide / Current Tables for Moores Landing, ICWW, Sewee Bay, South Carolina
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Moores Landing
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Fri -- 02:53 AM EDT     0.17 feet Low Tide
Fri -- 07:27 AM EDT     Sunrise
Fri -- 08:04 AM EDT     Moonrise
Fri -- 09:21 AM EDT     6.22 feet High Tide
Fri -- 03:21 PM EDT     0.30 feet Low Tide
Fri -- 06:39 PM EDT     Sunset
Fri -- 07:34 PM EDT     Moonset
Fri -- 09:31 PM EDT     5.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
31.60.50.20.71.93.34.65.66.26.15.342.51.10.40.51.42.7455.55.64.9

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Fri -- 12:18 AM EDT     -2.53 knots Max Ebb
Fri -- 03:20 AM EDT     0.01 knots Slack
Fri -- 05:40 AM EDT     1.75 knots Max Flood
Fri -- 07:27 AM EDT     Sunrise
Fri -- 08:05 AM EDT     Moonrise
Fri -- 09:38 AM EDT     -0.00 knots Slack
Fri -- 12:46 PM EDT     -2.78 knots Max Ebb
Fri -- 03:47 PM EDT     0.00 knots Slack
Fri -- 05:54 PM EDT     1.70 knots Max Flood
Fri -- 06:40 PM EDT     Sunset
Fri -- 07:35 PM EDT     Moonset
Fri -- 09:39 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.5-2.3-1.5-0.40.81.61.71.61.30.7-0.4-1.6-2.5-2.8-2.2-10.31.41.71.41.10.6-0.3-1.3

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 (12,3,4,5)
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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.