Wednesday, January24, 2018 L-36.com


Marine Weather and Tides
Bluffton, 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 7:19AMSunset 5:51PM Wednesday January 24, 2018 6:42 AM EST (11:42 UTC) Moonrise 11:55AMMoonset 12:02AM Illumination 52% Phase: First Quarter Moon; Moon at 8 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- 250 Am Est Wed Jan 24 2018
Today..NW winds 5 to 10 kt, becoming W late. Seas 2 to 3 ft.
Tonight..W winds 10 to 15 kt, becoming N after midnight. Seas 2 to 3 ft, building to 3 to 4 ft after midnight.
Thu..N winds 15 to 20 kt, becoming ne 10 to 15 kt in the afternoon. Seas 3 to 4 ft.
Thu night..NE winds 10 to 15 kt. Seas 3 to 4 ft.
Fri..NE winds 10 to 15 kt. Seas 3 ft.
Fri night..E winds 10 to 15 kt. Seas 3 to 4 ft.
Sat..E winds 10 kt. Seas 3 to 4 ft.
Sat night..SE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers.
Sun..SE winds 5 to 10 kt. Seas 3 to 4 ft. Showers likely.
Sun night..NW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers.
AMZ300 250 Am Est Wed Jan 24 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail into Saturday, with a frontal system to impact the area Sunday. Cooler high pressure will then return for the first part of next week.

7 Day Forecast for Marine Location Near Bluffton, SC
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location: 32.24, -80.85     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 240836
afdchs
area forecast discussion
national weather service charleston sc
336 am est Wed jan 24 2018

Synopsis
High pressure will prevail into Saturday, with a frontal system
to impact the area Sunday. Cooler high pressure will then
return for the first part of next week.

Near term through tonight
Today: the mid upper levels consist of nearly zonal flow over
the southeast u.S., with winds generally out of the west
southwest. A shortwave over the ms valley in the morning will
move eastward, beginning to move overhead late in the
afternoon. This wave will bring an increase in high clouds
throughout the day. At the surface, continental high pressure
with it's center over the southern plains this morning will
gradually move to the south and east. It's eastern periphery
will dominate our weather pattern, bringing us dry conditions.

Cold air advection appears to be fairly weak, especially as
winds turn to the west this afternoon. Highs are expected to
rise to near normal. Though, if clouds are thicker than
expected, some minor adjustments might be needed with the
temperatures.

Tonight: the shortwave will be moving overhead in the early
evening, then shifting offshore during the overnight hours. The
associated high clouds will gradually decrease as the night
progresses. At the surface, high pressure centered over the
southern ms valley in the evening will move eastward, becoming
located over the southern appalachians late tonight. Again, the
eastern periphery of the high will influence our weather with
dry conditions. Models show cold air advection increasing as the
winds turn to the north late. Combined with the clear skies
late, the result will be temperatures a few degrees below
normal. If winds decouple in some spots, temperatures could be
colder than what is currently forecasted.

Short term Thursday through Saturday
Thursday through Friday: relatively benign weather will prevail, as
short wave ridging develops in wake of a short wave that moves
through early in the period, while surface high pressure covers much
of the east and southeast as it moves eastward late in the week. The
atmosphere is completely void of moisture Thursday with pwat less
than 1 4 inch, resulting in full sunshine throughout the day. Friday
will experience an increase in low level moisture as the synoptic
flow veers around to the e-se. This along with isentropic ascent
will allow for marine-induced stratocumulus to advance onshore or
develop across the SE parts of our forecast district in the
afternoon. Temps will be near normal Thursday, then warming several
degrees Friday as h8 temps rise 2-3c and 1000-850 mb low level
thickness expands about 10-15 meters from the day before. In between
for Thursday night, good to excellent radiational cooling will
prevail allowing for lows 32-36f inland from the intra-coastal,
several degrees warmer along the barrier islands and in
downtown charleston.

Saturday: a zonal w-sw flow will prevail aloft between a prominate
mid level ridge over the bahamas and a strong short wave trough over
the northern plains and upper ms river valley. We're still under the
influence of expansive high pressure from the atlantic, although the
anticyclonic circulation is slightly altered by a subtle coastal
trough not far offshore. This along with minor perturbations aloft,
better moisture in the 1000-800 layer and isentropic upglide
could support a small chance of showers in a few locations.

Considerable cloudiness will be counteracted by warm advection
as a modified marine air mass encompasses the area. So temps
look to reach into the mid and upper 60s away from the immediate
shoreline.

Long term Saturday night through Tuesday
An amplifying mid and upper trough will sweep through the eastern
parts of the nation early next week, causing weak cyclogenesis
somewhere over or near fl along a cold front that approaches on
Sunday. Plentiful moisture will surge into the area Sunday as this
transpires, allowing for our best chance of wet weather this
forecast period. Instability is minimal, so no mention of thunder at
this time. Behind the cold front there is a shot of cooler and drier
canadian air that moves in starting Monday.

Aviation 08z Wednesday through Sunday
Vfr through 06z Thursday.

Extended aviation outlook:VFR through Saturday. Potential for
flight restrictions Sunday as rain chances increase ahead of a
frontal system that impacts the area.

Marine
Today: continental high pressure centered over the southern
plains this morning will gradually move to the south and east.

It's eastern periphery will dominate the coastal waters with nw
winds in the morning shifting to the west in the afternoon.

Tonight: high pressure centered over the southern ms valley in
the evening will move eastward, becoming located over the
southern appalachians late tonight. Again, the eastern periphery
of the high will influence the coastal waters. Models show cold
air advection increasing along with some pinching of the
pressure gradient late. This will lead to winds shifting to the
north and increasing. At this point, it appears the waters
within 20 nm won't need small craft advisories. However, the ga
waters beyond 20 nm are borderline due to gusts approaching 25
kt. Given the short time period these conditions are forecasted
and the marginal confidence, we opted to hold off on an
advisory at this time.

Thursday: a 1035 mb high centered near the central appalachians will
slide into eastern nc and va during the afternoon. There is a decent
pinching of the gradient, and with cold advection and modest
isallobaric pressure rises in the morning we look to be close to
a marginal small craft advisory on the outer ga waters.

Friday through Saturday: a large region of high pressure over the
mid-atlantic region Friday will shift offshore Saturday, as it
expands across the local waters. There might be a weak inverted
trough that forms inside the marine area, which prevent winds from
veering no more than to the E or E ne. Winds are expected to remain
below 15 or 20 kt, but with the favorable onshore fetch there could
be a risk for a marginal SCA again on the amz374 waters, but this
time due to seas reaching near 6 ft.

Sunday through Monday: weak low pressure develops along a frontal
system over or near fl Sunday, before it shifts into the atlantic
and is followed by continental high pressure building in for Monday.

Conditions remain below advisory thresholds Sunday, but cold
advection and isallobaric pressure climbs Monday could result in
sca's over parts of the marine district.

Equipment
The kclx radar remains out of service until further notice. Adjacent
radars include: kltx, kcae, kjgx, kvax and kjax.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term...

short term...

long term...

aviation...

marine...

equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 14 mi43 min NW 7 G 8.9 46°F 48°F1021.8 hPa (+1.7)
41033 23 mi35 min NW 7.8 G 9.7 44°F 48°F1020.4 hPa
ACXS1 - ACE Basin Reserve, SC 30 mi58 min W 1 42°F 1021 hPa35°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 58 mi53 min WNW 9.7 G 12 50°F 50°F1 ft1021.3 hPa (+1.0)40°F

Wind History for Fort Pulaski, GA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilton Head Island, Hilton Head Airport, SC8 mi48 minWNW 510.00 miFair45°F33°F66%1021.7 hPa
Beaufort County Airport, SC17 mi68 minW 57.00 miFair43°F33°F71%1021.3 hPa
Beaufort, Marine Corps Air Station, SC18 mi47 minWNW 510.00 miFair43°F35°F74%1021.5 hPa
Savannah-Hilton Head International Airport, GA20 mi50 minWNW 310.00 miPartly Cloudy37°F32°F82%1021.9 hPa
Hunter U. S. Army Airfield, GA22 mi1.8 hrsNW 410.00 miFair40°F31°F71%1020.9 hPa

Wind History from HXD (wind in knots)
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Last 24hrSW10SW10SW10S10SW15W15
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1 day agoN3NE5NE5N5NE8NE5--SE3E3E3E3E3E3S7S9
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2 days agoSW5SW5SW5SW3S3SE5SE4SE3S3S3S3S5S5S4S3CalmCalmCalmCalmN3CalmCalmCalmCalm

Tide / Current Tables for Bluffton, May River, South Carolina
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Bluffton
Click for Map
Wed -- 12:02 AM EST     Moonset
Wed -- 01:37 AM EST     7.61 feet High Tide
Wed -- 07:21 AM EST     Sunrise
Wed -- 07:35 AM EST     0.58 feet Low Tide
Wed -- 11:55 AM EST     Moonrise
Wed -- 02:03 PM EST     7.28 feet High Tide
Wed -- 05:20 PM EST     First Quarter
Wed -- 05:49 PM EST     Sunset
Wed -- 08:08 PM EST     0.05 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.67.57.56.75.23.41.80.80.71.42.84.55.96.97.36.95.742.20.80.10.41.63.5

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Wed -- 12:02 AM EST     Moonset
Wed -- 02:05 AM EST     -0.00 knots Slack
Wed -- 04:44 AM EST     -1.77 knots Max Ebb
Wed -- 07:21 AM EST     Sunrise
Wed -- 08:23 AM EST     0.00 knots Slack
Wed -- 10:56 AM EST     1.60 knots Max Flood
Wed -- 11:55 AM EST     Moonrise
Wed -- 02:34 PM EST     -0.00 knots Slack
Wed -- 05:16 PM EST     -1.67 knots Max Ebb
Wed -- 05:20 PM EST     First Quarter
Wed -- 05:49 PM EST     Sunset
Wed -- 08:41 PM EST     0.00 knots Slack
Wed -- 11:26 PM EST     2.02 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.40.80.1-0.8-1.6-1.7-1.5-1-0.30.61.31.61.30.90.4-0.3-1.2-1.6-1.6-1.2-0.60.31.32

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 (6,6,7,8)
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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.