Wednesday, April25, 2018 L-36.com


Marine Weather and Tides
Hilton Head Island, SC

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:40AMSunset 8:01PM Wednesday April 25, 2018 9:55 PM EDT (01:55 UTC) Moonrise 2:48PMMoonset 3:15AM Illumination 82% Phase: Waxing Gibbous; Moon at 11 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- 931 Pm Edt Wed Apr 25 2018
Rest of tonight..W winds 5 to 10 kt. Seas 2 to 3 ft.
Thu..W winds 5 kt, becoming S in the afternoon. Seas 2 to 3 ft.
Thu night..S winds 10 to 15 kt, becoming sw after midnight. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms.
Fri..SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 ft.
Fri night..SW winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft.
Sat..W winds 10 kt, becoming sw in the afternoon. Seas 2 ft.
Sat night..SW winds 5 to 10 kt, becoming W after midnight. Seas 2 ft.
Sun..NE winds 5 to 10 kt. Seas 2 ft.
Sun night..E winds 5 to 10 kt. Seas 2 to 3 ft.
Mon..NE winds 10 to 15 kt. Seas 3 to 4 ft.
Mon night..E winds 10 to 15 kt. Seas 3 to 4 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 931 Pm Edt Wed Apr 25 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Low pressure will pass by to the west and then north of the area Thursday into Thursday night. Mainly dry cold fronts will then move through Friday night and again Saturday night followed by high pressure through early next week.

7 Day Forecast for Marine Location Near Hilton Head Island, SC
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location: 32.22, -80.77     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 260132
afdchs
area forecast discussion
national weather service charleston sc
932 pm edt Wed apr 25 2018

Synopsis
Low pressure will pass by to the west and then north of the
area Thursday into Thursday night. Mainly dry cold fronts will
then move through Friday night and again Saturday night
followed by high pressure through early next week.

Near term until 6 am Thursday morning
No meaningful changes were made for the late evening update.

Diurnal cumulus has dissipated and the boundary layer is quickly
decoupling. Lows form the mid 50s inland to the lower 60s at
the beaches look on track.

Short term 6 am Thursday morning through Saturday
Low pressure will pass by to the north and west on Thursday as a
weakening upper low moves from the lower mississippi valley to the
southern tennessee valley and then into the southern appalachians.

Strong deep layer shear and low to moderate instability will support
organized convection across the deep south which will move into the
central savannah river area and eastern midlands during the mid to
late afternoon. Thus, rain chances will increase from the west
during the afternoon and continue into the evening with the best
chances likely toward the csra, midlands and pee dee. Can't rule out
a few stronger storms later tomorrow afternoon into the early
evening, mainly across inland portions of our forecast area.

Damaging winds look to be the main hazard from the storms but large
hail will be possible as temperatures cool aloft and wet bulb zero
heights lower. Rain will end from south to north Thursday night as
the low moves toward va and a weak cold front pushes through the
local area. Another weak cold front will approach Friday and push
through Friday night but moisture will be limited and thus rain
chances will be very low. Slightly drier conditions are then
expected Saturday ahead of another cold front but temperatures will
likely be a bit warmer given the downslope, offshore flow.

Temperatures overall will be near normal.

Long term Saturday night through Wednesday
No rain is expected through at least the middle of next week.

Surface high pressure will build from the north this weekend. Then,
the surface high will shift south over the region as an upper ridge
builds over the region by early next week, and this regime will then
prevail through the week. As the surface high migrates south,
persistent onshore flow will commence later this weekend and will
continue next week. Thus, temperatures will remain close to normal
for late april early may, featuring highs in the upper 70s lower 80s
inland and upper 60s lower 70s on the beaches and lows in the 50s
inland 60s at the coast.

Aviation 02z Thursday through Monday
Vfr.

Extended aviation outlook:VFR through Mon except for possible
restrictions due to low clouds and or showers Thursday night.

Marine
Tonight: the pressure gradient will relax overnight with winds
dropping below 10 kt by late evening.

Thursday through Monday: no significant issues this period with a
few weak cold fronts expected to push through each night through
Saturday night. High pressure will then prevail through early next
week.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 15 mi37 min W 4.1 G 5.1 69°F 67°F1011.4 hPa
41033 20 mi47 min W 7.8 G 9.7 69°F 67°F1010.4 hPa
ACXS1 - ACE Basin Reserve, SC 29 mi70 min Calm 69°F 56°F
FBIS1 - Folly Island, SC 57 mi55 min SW 7 G 8.9 69°F 1010.7 hPa (+2.1)62°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilton Head Island, Hilton Head Airport, SC4 mi60 minVar 410.00 miMostly Cloudy70°F55°F60%1011.2 hPa
Beaufort County Airport, SC15 mi60 minWSW 710.00 miFair70°F55°F60%1010.5 hPa
Beaufort, Marine Corps Air Station, SC18 mi59 minWSW 510.00 miFair67°F55°F68%1010.6 hPa
Savannah-Hilton Head International Airport, GA23 mi62 minW 410.00 miA Few Clouds69°F55°F61%1011.1 hPa
Hunter U. S. Army Airfield, GA24 mi59 minWSW 510.00 miMostly Cloudy69°F55°F61%1010.8 hPa

Wind History from HXD (wind in knots)
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Last 24hrSW54SW566SW6SW555
G10
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1 day ago5
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2 days agoE8E10
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Tide / Current Tables for Skull Creek, south entrance, Hilton Head Island, South Carolina
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Skull Creek
Click for Map
Wed -- 04:14 AM EDT     Moonset
Wed -- 05:27 AM EDT     7.76 feet High Tide
Wed -- 06:42 AM EDT     Sunrise
Wed -- 11:53 AM EDT     0.01 feet Low Tide
Wed -- 03:48 PM EDT     Moonrise
Wed -- 06:08 PM EDT     7.58 feet High Tide
Wed -- 07:59 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.41.63.45.36.87.77.66.85.43.71.90.500.62.145.87.17.67.36.24.72.81

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Wed -- 02:39 AM EDT     2.15 knots Max Flood
Wed -- 04:14 AM EDT     Moonset
Wed -- 06:18 AM EDT     -0.00 knots Slack
Wed -- 06:43 AM EDT     Sunrise
Wed -- 09:53 AM EDT     -2.21 knots Max Ebb
Wed -- 12:28 PM EDT     0.01 knots Slack
Wed -- 03:12 PM EDT     1.94 knots Max Flood
Wed -- 03:48 PM EDT     Moonrise
Wed -- 06:50 PM EDT     -0.00 knots Slack
Wed -- 07:59 PM EDT     Sunset
Wed -- 10:23 PM EDT     -2.32 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.11.422.11.91.40.4-0.8-1.6-2-2.2-1.8-0.60.71.61.91.91.60.9-0.2-1.2-1.9-2.3-2.2

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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (21,6,7,8)
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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.