Sunday, August18, 2019 L-36.com


Marine Weather and Tides
Port Royal, SC

Version 3.4
NOTICE
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 6:47AMSunset 8:05PM Sunday August 18, 2019 2:47 AM EDT (06:47 UTC) Moonrise 9:06PMMoonset 8:24AM Illumination 93% Phase: Waning Gibbous; Moon at 17 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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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 117 Am Edt Sun Aug 18 2019
.small craft advisory in effect until 5 am edt early this morning...
Rest of tonight..SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft. Scattered showers and tstms.
Sun..SW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 ft in the afternoon. A chance of showers and tstms.
Sun night..SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Mon..SW winds 5 to 10 kt, becoming S in the afternoon. Seas 2 ft. A chance of showers and tstms.
Mon night..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Tue..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Tue night..S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Wed..S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Wed night..S winds 5 to 10 kt. Seas 3 ft. A chance of showers and tstms.
Thu..SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Thu night..S winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 117 Am Edt Sun Aug 18 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. An area of low pressure will lift northeast of the area tonight. A stationary front will linger nearby through Sunday before dissipating. Atlantic high pressure and an inland trough will then prevail through much of the week.


7 Day Forecast for Marine Location Near Port Royal town, SC
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location: 32.33, -80.47     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 180538
afdchs
area forecast discussion
national weather service charleston sc
138 am edt Sun aug 18 2019

Synopsis
An area of low pressure will lift northeast of the area
tonight. A stationary front will linger nearby through Sunday
before dissipating. Atlantic high pressure and an inland trough
will then prevail through much of the week.

Near term until 6 am this morning
As of 135 am: a few showers will likely linger over the marine
zones early this morning. IR satellite indicates patches of
ragged low clouds were developing along the coast. I will update
the forecast to lower pops and adjust sky cover.

Previous discussion:
moisture, instability and complex mesoscale boundaries could
support showers thunderstorms at any time location overnight.

However, widespread rainfall appears unlikely per recent
guidance. Thus, persistent pops are graduated from slight chance
inland to chance near the coast. Given pwat values well above 2
inches, any slow-moving thunderstorms could produce locally
heavy rainfall.

Also of note, overnight conditions will favor areas of stratus
and patchy fog, especially where heavy rain fell away from the
immediate coast.

Short term 6 am this morning through Tuesday
Fairly unsettled pattern will persist into early next week. Surface
high pressure will remain offshore while a weak boundary lingers
inland before dissipating. Deep moisture is progged to reside along
the coastal areas and southeast georgia through the period, with
somewhat drier air inland. It will likely be a pattern where
convection largely fires over the waters during the overnight into
morning hours, and then activity gets going over land during peak
heating as the sea breeze circulation and other mesoscale boundaries
come into play. Pops are a bit higher than normal.

Given wet antecedent conditions, could not rule out some ponding on
roadways, especially in poor drainage areas, where heavy rain falls.

Otherwise, the overall severe weather potential looks low given
marginal instability, but a couple stronger storms are possible
during the afternoon evening hours especially where boundary
interactions occur.

Temperatures will be fairly close to normal, warmest on Sunday.

Highs will range from the low mid 90s inland to mid upper 80s at the
immediate coast. Lows will mainly be in the low to mid 70s.

Long term Tuesday night through Saturday
Moderate confidence this period. High pressure will linger to the
east with low pressure inland. We generally expect a fairly typical
summertime pattern with mainly afternoon evening scattered showers
and thunderstorms, although the some showers and storms could
persist overnight depending on the placement strength of the upper
level low. An approaching cold front late in the week could lead to
better rain chances but confidence is low in any significant impacts
at this point. Temperatures should remain near or above normal.

Aviation 05z Sunday through Thursday
Prior to the 6z tafs, IR satellite and sfc observations
indicated that a ragged patch of MVFR ceilings was approaching
kchs. I will highlight the ceilings with a tempo from 6z to 10z.

Forecast soundings and MOS indicated that ifr to MVFR ceilings
will develop over ksav around dawn. Near term guidance indicates
that a sea breeze will develop along the coast by late this
morning, sliding inland through the afternoon hours. Cams
indicate that showers and thunderstorms will pass near the
terminals during the early to mid afternoon hours, I will
highlight the tsra potential with tempo groups.

Extended aviation outlook: periodic restrictions from mainly
afternoon evening showers and thunderstorms expected at
kchs ksav through mid week.

Marine
Overnight: southwest winds have remain elevated through the
evening, and gusts to 25 knots should remain common for several
more hours especially at 10 nm and beyond. Thus, extended small
craft advisories until 5 am for amz350, amz352 and amz374. Seas
will continue to range from 3-5 feet across nearshore waters to
as high as 6-7 feet beyond 20 nm. Also, thunderstorms could
produce locally hazardous conditions at any time overnight.

Sunday through Thursday: atlantic high pressure will largely be the
dominant feature into mid week. Conditions are expected to remain
below small craft advisory criteria. Winds will generally be out of
the south or southwest at 15 knots or less, with seas 2 to 3 feet
on average.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 5 am edt early this morning for
amz350-352-374.

Near term... Ned
short term...

long term...

aviation... Ned
marine... Spr


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41033 5 mi40 min WSW 18 G 21 80°F 85°F1016.3 hPa
ACXS1 - ACE Basin Reserve, SC 16 mi63 min WSW 1.9 77°F 1016 hPa75°F
FPKG1 - 8670870 - Fort Pulaski, GA 31 mi54 min WSW 7 G 9.9 77°F 85°F1016.9 hPa
FBIS1 - Folly Island, SC 39 mi48 min WSW 7 G 8.9 79°F 1016.6 hPa (-0.0)76°F
CHTS1 43 mi54 min SW 4.1 G 8 79°F 86°F1016.2 hPa

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort County Airport, SC10 mi73 minWSW 810.00 miFair77°F73°F89%1016.3 hPa
Hilton Head Island, Hilton Head Airport, SC14 mi73 minWSW 9 G 1910.00 miA Few Clouds77°F73°F89%1016.6 hPa

Link to 5 minute data for KHXD

Wind History from HXD (wind in knots)
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Last 24hrSW4CalmCalmCalmE3N8NW5SW5SW5SW9SW11S7SW13S11S4E7
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1 day agoCalmCalmSW5S6S5SW3SW5SW6S6S6S6S8S8S8S7S7S9S9S11
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2 days agoCalm4CalmCalmS5S5S5S5SW9SW7S6S9S7S7S10
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Tide / Current Tables for Fripps Inlet, Hunting Island Bridge, St. Helena Sound, South Carolina
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Station Creek, County Landing, South Carolina
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Station Creek
Click for Map
Sun -- 04:27 AM EDT     0.43 feet Low Tide
Sun -- 06:48 AM EDT     Sunrise
Sun -- 09:24 AM EDT     Moonset
Sun -- 10:59 AM EDT     6.80 feet High Tide
Sun -- 04:33 PM EDT     0.76 feet Low Tide
Sun -- 08:03 PM EDT     Sunset
Sun -- 10:06 PM EDT     Moonrise
Sun -- 11:20 PM EDT     7.08 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.65.23.51.70.60.61.42.84.45.76.56.86.35.23.620.90.81.62.94.45.76.67

Weather Map and Satellite Images
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wmap_A
GOES Local Image of Southeast    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 Charleston, SC (2,6,7,8)
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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.