Monday, August19, 2019 L-36.com


Marine Weather and Tides
Awendaw, SC

Version 3.4
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7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:44AMSunset 8:01PM Monday August 19, 2019 12:34 PM EDT (16:34 UTC) Moonrise 9:32PMMoonset 9:14AM Illumination 83% Phase: Waning Gibbous; Moon at 19 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- 1026 Am Edt Mon Aug 19 2019
Rest of today..S winds 5 to 10 kt. A slight chance of showers and tstms.
Tonight..SW winds 5 to 10 kt. A slight chance of showers and tstms.
Tue..S winds 5 to 10 kt. A slight chance of showers and tstms in the morning, then a chance of showers and tstms in the afternoon.
Tue night..S winds 5 to 10 kt. A slight chance of showers and tstms in the evening, then a chance of showers and tstms after midnight.
Wed..SW winds 5 kt, becoming S 10 to 15 kt with gusts to 20 kt in the afternoon. A chance of showers and tstms.
Wed night..S winds 10 to 15 kt with gusts to 20 kt, becoming sw 5 to 10 kt after midnight. A chance of showers and tstms.
Thu..SW winds 10 to 15 kt. A chance of showers and tstms.
Thu night..SW winds 10 to 15 kt. A chance of showers and tstms.
Fri..SW winds 5 to 10 kt. A chance of showers and tstms.
Fri night..SW winds 5 to 10 kt. A chance of showers and tstms. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 85 degrees.
AMZ300 1026 Am Edt Mon Aug 19 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Atlantic high pressure and an inland trough will prevail until late week when a cold front possibly affects the area.


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 191442
afdchs
area forecast discussion
national weather service charleston sc
1042 am edt Mon aug 19 2019

Synopsis
Atlantic high pressure and an inland trough will prevail until
late week when a cold front possibly affects the area.

Near term through tonight
Late this morning: current kclx radar imagery shows just a few
light rain showers along the southeast georgia coast. On
satellite imagery it is quite easy to pick out the main feature
for the day as well as the attributes of the airmass. There is a
clear circulation centered across turner, irwin, and coffee
counties in georgia, with ongoing convection within that center.

Further to the east, morning stratus is starting to respond to
surface heating and taking on a more convective appearance,
including rapid development of stratocumulus in areas that were
clear at day break. These cloud developments point to a very
moist airmass which is supported by the kchs RAOB which had a
precipitable water value of just over 2 inches. The
aforementioned weak surface low will generally meander around
south-central georgia today, helping to generate showers and
thunderstorms around the center and its periphery. Models are in
good agreement that the best coverage in the forecast area will
be across southeast georgia and that is where rain chances are
in the 50-70 percent range this afternoon. The further east you
go and the further away from the low you get, coverage will be
less but should still be more than it was on Sunday. Overall,
the severe threat is low thanks to an unimpressive near storm
environment. We could see some pockets of localized heavy rain
today, but it shouldn't be enough to cause any notable flooding
concerns. Also, storm motion should be just enough to preclude
effects from stationary storms.

Tonight: convection is forecast to gradually dissipate during
the evening hours, lingering the latest over the inland
counties. Isolated showers and thunderstorms may persist over
the marine zones through the night. Using a blend of mos, low
temperatures are forecast to range from the low 70s inland to
the upper 70s over the beaches.

Short term Tuesday through Thursday
Moderate confidence this period. Deep layer troughing will
linger inland while high pressure persists offshore. It appears
as though the best moisture and forcing will likely stay just
west of the area at least through Wednesday but we'll continue
to mention a chance of scattered showers and thunderstorms each
day. Given the deep moisture and generally light low-mid level
winds there will at least be a small risk of localized heavy
rain flooding. Also can't completely rule out isolated severe
storms each day but conditions aren't that favorable for much
severe weather due to limited instability deep layer shear.

Temperatures should be near to above normal.

Long term Thursday night through Sunday
Low to moderate confidence this period. The pattern doesn't
change much until a cold front possibly moves near or even into
the area this weekend and stalls into early next week keeping
the weather more unsettled than normal. Not expecting much more
than isolated severe storms flooding at this time. Temperatures
should fall back closer to normal given the increased rain cloud
coverage.

Aviation 15z Monday through Friday
Earlier ifr ceilings at ksav have lifted and started to mix out,
but some periods of MVFR will be possible through late morning.

The combination of deep moisture and steeper afternoon lapse
rates should support scattered to numerous thunderstorms today.

I will highlight the mid to late afternoon hours with a tempo
for tsra at both sites. Cams indicate that ksav will see a
greater chance for thunderstorms that kchs. Convection should
dissipate within an hour or two of sunset.

Extended aviation outlook: periodic restrictions at kchs ksav
through sat, mainly from afternoon evening showers and
thunderstorms.

Marine
The surface pattern will support steady south winds between
10-15 kts today and tonight. Wave heights are forecast to range
between 1- 3 ft. Isolated to scattered thunderstorms are
expected over the waters today and tonight. The coverage should
peak this afternoon within 10 nm of shore.

Tuesday through Saturday: atlantic high pressure and an inland
trough will result in mainly south southwest winds around 15
knots or less through the period. No significant marine impacts
are expected other than some stronger storms from time to time.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term... Bsh ned
short term... Rjb
long term... Rjb
aviation... Ned rjb
marine... Ned rjb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41029 - Capers Nearshore (CAP 2) 10 mi86 min WSW 3.9 G 9.7 81°F 84°F1020.3 hPa
CHTS1 17 mi52 min SSE 6 G 8 84°F 85°F1019.7 hPa
FBIS1 - Folly Island, SC 21 mi34 min S 7 G 8 83°F 1020.1 hPa (+0.4)76°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 38 mi109 min SW 4.1 83°F 1019 hPa76°F
41004 - EDISTO - 41 NM Southeast of Charleston, SC 43 mi34 min SSW 7.8 G 7.8 82°F 82°F1019.9 hPa (+0.6)77°F
ACXS1 - ACE Basin Reserve, SC 49 mi109 min Calm 82°F 1020 hPa76°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 mi39 minSW 47.00 miA Few Clouds86°F75°F70%1019.3 hPa
Charleston, Charleston Air Force Base, SC19 mi98 minVar 410.00 miMostly Cloudy84°F73°F72%1019.4 hPa
Charleston Executive Airport, SC24 mi39 minVar 69.00 miPartly Cloudy86°F77°F75%1019.6 hPa

Link to 5 minute data for KLRO

Wind History from LRO (wind in knots)
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Last 24hrSW6W5
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CalmS7SW73SW54S7S6S4--CalmS3Calm----CalmCalmCalmCalm3CalmSW4
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Tide / Current Tables for Moores Landing, ICWW, Sewee Bay, South Carolina
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Moores Landing
Click for Map
Mon -- 05:12 AM EDT     0.53 feet Low Tide
Mon -- 06:44 AM EDT     Sunrise
Mon -- 10:14 AM EDT     Moonset
Mon -- 11:14 AM EDT     5.02 feet High Tide
Mon -- 05:21 PM EDT     0.82 feet Low Tide
Mon -- 07:59 PM EDT     Sunset
Mon -- 10:31 PM EDT     Moonrise
Mon -- 11:30 PM EDT     5.13 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.14.33.1210.50.81.62.83.94.754.94.23.32.21.30.911.72.83.94.75.1

Tide / Current Tables for Charleston Harbor, off Fort Sumter, South Carolina Current (expired 1996-12-31)
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Charleston Harbor
Click for Map
Mon -- 02:37 AM EDT     -2.25 knots Max Ebb
Mon -- 06:02 AM EDT     0.00 knots Slack
Mon -- 06:45 AM EDT     Sunrise
Mon -- 08:29 AM EDT     1.83 knots Max Flood
Mon -- 10:14 AM EDT     Moonset
Mon -- 11:43 AM EDT     -0.00 knots Slack
Mon -- 02:51 PM EDT     -2.18 knots Max Ebb
Mon -- 06:13 PM EDT     0.00 knots Slack
Mon -- 08:00 PM EDT     Sunset
Mon -- 08:48 PM EDT     1.95 knots Max Flood
Mon -- 10:32 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-1.4-2.1-2.2-1.8-1-011.71.71.20.6-0.2-1.2-1.9-2.2-1.8-1.1-0.20.81.71.91.50.8

Weather Map and Satellite Images
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wmap_A
GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (12,3,4,5)
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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 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.