Thursday, July18, 2019 L-36.com


Marine Weather and Tides
Port Royal, SC

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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 6:27AMSunset 8:30PM Thursday July 18, 2019 11:51 PM EDT (03:51 UTC) Moonrise 8:57PMMoonset 6:53AM Illumination 96% 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- 1011 Pm Edt Thu Jul 18 2019
Tonight..SW winds 15 to 20 kt, diminishing to 10 to 15 kt late. Seas 3 to 4 ft. A chance of showers and Thunderstorms through 1 am.
Fri..SW winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of showers and tstms.
Fri night..SW winds 10 to 15 kt. Seas 3 ft. A slight chance of showers and tstms in the evening, then a chance of showers and tstms after midnight.
Sat..SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms, mainly in the morning.
Sat night..SW winds 10 to 15 kt. Seas 3 ft. A slight chance of showers and tstms in the evening, then a chance of showers and tstms after midnight.
Sun..SW winds 10 to 15 kt. Seas 3 ft. A chance of showers and tstms, mainly in the morning.
Sun night..SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft. A chance of showers and tstms.
Mon..SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Mon night..SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Tue..SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Tue night..SW winds 10 to 15 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 1011 Pm Edt Thu Jul 18 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Into early next week, the area will remain hot and humid between an inland trough of low pressure and atlantic high pressure. A cold front is expected to stall over or close to the region by the middle of next week, bringing higher rain chances and somewhat cooler temperatures.


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 190231
afdchs
area forecast discussion
national weather service charleston sc
1031 pm edt Thu jul 18 2019

Synopsis
Into early next week, the area will remain hot and humid
between an inland trough of low pressure and atlantic high
pressure. A cold front is expected to stall over or close to
the region by the middle of next week, bringing higher rain
chances and somewhat cooler temperatures.

Near term until 6 am Friday morning
Latest trends through midnight indicated multicell thunderstorms
and associated weak cool pool gradually pushing offshore and
decreasing in coverage and intensity. Deep moisture lingers and
lighter rains inland will also disperse but isolated tstms also
possible given the myriad of mesoscale boundaries in the region.

Showers and tstms still going in southeast ga in areas along
i-95 where the atmosphere was not previously tapped.

We adjusted 10 pm observed temps and pops and mainly blended
current conditions into the anticipated quieter overnight
forecast grids. Our area will remain between atlantic high
pressure and troughing inland. Both the synoptic models and the
cams are in good agreement showing land areas becoming
relatively dry overnight.

Short term 6 am Friday morning through Sunday
Friday through Sunday: outside any thunderstorms, heat index values
will top out in the 105-109f range at many locations, and heat index
values could briefly top out around 110f at some locations near the
coast just inland from the beaches as the sea breeze pushes inland.

Guidance depicts above normal pops Friday afternoon early evening,
especially across southeast ga, due in part to an enhanced weakness
in the upper ridge over the region. Capped maximum pops around 50
percent across SE ga, but locally greater pops could eventually be
required. In typical fashion for mid-july, a couple of pulse
thunderstorms could briefly become severe with damaging wind gusts.

Saturday and Sunday: per latest guidance, only subtle changes in the
configuration of the upper ridge and inland surface trough could
translate to reduced coverage of diurnal afternoon into evening
thunderstorms as compared with Friday afternoon evening. The risk
for brief isolated damaging wind gusts will continue each
afternoon evening.

Long term Sunday night through Thursday
Moderate confidence this period. The low-level lee-side trough looks
to persist early in the week before deeper troughing likely moves
into the area for mid week. This will mean increasing rain chances
and lower temperatures, although hesitate to be too aggressive with
rain chances so far out given the rarity of summertime cold fronts
in this part of the country. Heat indices could still be near 110
degrees through Monday but the risk for heat advisories will likely
be over starting Tuesday.

Aviation 02z Friday through Tuesday
Tstms still lingering at or around kchs ksav at 0230z. Lighter
rains at kchs should disperse by midnight withVFR conditions
expected overnight and Friday morning. Tstms are again possible
late day on Friday.

Extended aviation outlook:VFR much of this period. Brief flight
restrictions and gusty shifting winds could occur within near
thunderstorms, especially during the afternoon evening hours.

The chance for thunderstorms associated flight restrictions could be
greatest Friday afternoon evening and starting Tuesday as a cold
front approaches the region.

Marine
Tonight: the synoptic pattern will consist of high pressure in
the atlantic and a trough inland. The surface pressure gradient
will become elevated the first half of the night, causing the
low level jet to set up. Expect S to SW winds up to 15-20 kt
with higher gusts through midnight. Winds will gradually ease
during the second half of the night, as the gradient lowers
slightly. Seas will be in the 2-4 ft range. Showers and tstms
across charleston waters will tend to move away by midnight with
synoptic wind fields returning to south and southwest.

Friday through Tuesday: a typical summer pattern featuring a trough
of low pressure inland and offshore high pressure will support a
continuation of south southwest winds through the period. Wind
speeds will be enhanced near the coast during the afternoon evening
from the sea breeze and across coastal waters during the overnight.

Through this weekend, winds should remain capped around 20 knots and
seas should;d average 2-4 feet, below small craft advisory levels.

Early next week, a cold front will approach the region, and the
probability for local SCA conditions could increase.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term...

short term...

long term... Rjb
aviation...

marine...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41033 5 mi43 min WSW 9.7 G 14 85°F 87°F1018.1 hPa
ACXS1 - ACE Basin Reserve, SC 16 mi66 min E 1.9 81°F 1019 hPa72°F
FPKG1 - 8670870 - Fort Pulaski, GA 31 mi57 min WSW 6 G 8 82°F 87°F1019.1 hPa
FBIS1 - Folly Island, SC 39 mi51 min NNW 6 G 8 74°F 1019.5 hPa (+2.9)72°F
CHTS1 43 mi51 min SW 2.9 G 6 75°F 87°F1018.8 hPa (+2.6)

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort County Airport, SC10 mi56 minW 47.00 miFair82°F69°F66%1018.6 hPa
Hilton Head Island, Hilton Head Airport, SC14 mi56 minN 010.00 miA Few Clouds82°F73°F74%1019 hPa

Wind History from HXD (wind in knots)
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Last 24hr------------S5S5SW8SW8SW5S5S5S5S14S8S14
G17
S14S14S15S10W4CalmSW4
1 day ago----SW3CalmCalm--CalmCalmCalmCalmN6NW6NW3E3SE3S4S11S9S13S11S1110
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2 days agoCalmCalmCalm--CalmCalmCalmCalmN5NE5NE5NE6NE5E3E5SE6
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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
Thu -- 03:46 AM EDT     0.16 feet Low Tide
Thu -- 06:27 AM EDT     Sunrise
Thu -- 07:53 AM EDT     Moonset
Thu -- 10:08 AM EDT     6.47 feet High Tide
Thu -- 03:43 PM EDT     0.33 feet Low Tide
Thu -- 08:29 PM EDT     Sunset
Thu -- 09:57 PM EDT     Moonrise
Thu -- 10:35 PM EDT     7.40 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.842.10.60.20.823.6566.56.153.51.90.60.412.33.95.46.67.37.3

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (23,6,7,8)
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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.