Wednesday, January17, 2018 L-36.com


Marine Weather and Tides
Skidaway Island, GA

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 7:22AMSunset 5:45PM Wednesday January 17, 2018 8:26 PM EST (01:26 UTC) Moonrise 7:42AMMoonset 6:27PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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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AMZ354 Waters From Savannah Ga To Altamaha Sound Ga Out 20 Nm, Including Grays Reef National Marine Sanctuary- 650 Pm Est Wed Jan 17 2018
.small craft advisory in effect through Thursday morning...
Tonight..NW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft.
Thu..N winds 15 to 20 kt, becoming nw 10 to 15 kt in the afternoon. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the afternoon.
Thu night..W winds 5 to 10 kt. Seas 2 ft.
Fri..W winds 5 to 10 kt. Seas 2 ft.
Fri night..W winds 5 to 10 kt. Seas 1 foot.
Sat..W winds 5 kt, becoming sw in the afternoon. Seas 1 foot.
Sat night..Variable winds 5 kt. Seas 1 foot.
Sun..NE winds 5 to 10 kt. Seas 1 foot.
Sun night..E winds 5 to 10 kt. Seas 1 foot.
Mon..SE winds 10 to 15 kt. Seas 2 ft. A slight chance of showers.
Mon night..W winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers.
AMZ300 650 Pm Est Wed Jan 17 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Cold, dry high pressure will build into the region and prevail into Friday before moderating temperatures occur this weekend into early next week. A cold front will push through the area Monday, followed by dry high pressure into the middle of next week.

7 Day Forecast for Marine Location Near Skidaway Island, GA
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location: 31.91, -81.06     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 180014
afdchs
area forecast discussion
national weather service charleston sc
714 pm est Wed jan 17 2018

Synopsis
Cold, dry high pressure will build into the region and prevail
into Friday before moderating temperatures occur this weekend
into early next week. A cold front will push through the area
Monday, followed by dry high pressure into the middle of next
week.

Near term through Thursday
A cut-off upper low over the western carolinas will swing east
tonight and will be off the nc coast by Thursday morning. The
associated embedded short wave will pivot through the first
part of the night, when our best height falls occur. Meanwhile
at the surface, high pressure will build in from the west as low
pressure lifts to the northeast.

Considerable moisture remains trapped beneath the low level
inversion within the cyclonic flow, especially over the northern
half of the forecast area. But with the passage of the short
wave aloft and an anticyclonic flow developing late evening and
overnight, moisture is stripped out and skies will clear.

Meanwhile, there is already freezing temps above about 1000 ft
this evening, and colder air will continue to filter in
underneath and at the surface. During this transition there will
be a little light rain or sprinkles over parts of the charleston
tri-county district that mixes with or even changes over to very
light snow or flurries. This is only a novelty and no impacts
will occur, with absolutely no accumulations. We have slight
chance pop through about 11 pm to midnight as a result.

Strong cold advection will take hold tonight with temperatures
dropping to the low-mid 20s. These temperatures will combine
with elevated winds to produce wind chills in the mid teens.

Given the coastal county wind chill advisory criteria is 15
degrees, we have an advisory for 4 am to 8 am. Conditions
elsewhere (inland) are not expected to meet their respective
criteria of 10 degrees.

Short term Thursday night through Saturday
Cold, dry high pressure will continue to build in behind a
sharp upper shortwave trough Thursday, then prevail into Friday
before temperatures moderate to above normal levels Saturday.

Many areas will start Thursday morning in the lower to mid 20s
and this will cause wind chills near 15 degrees. Most areas will
be back into the 20s Friday morning, even close to freezing at
the coast.

Long term Saturday night through Wednesday
High pressure will prevail over the southeast united states late
weekend into early next week before a cold front arrives Monday. The
pattern will favor warming conditions under ridging aloft. In
general, afternoon highs will peak in the mid upper 60s on Sunday.

By Monday, southerly winds will help advect deep moisture over the
southeast and produce some cloud cover ahead of the approaching
front. This could limit overall heating potential, but a prevailing
southerly flow should still support temps in the upper 60s for most
locations in southeast south carolina to around 70 degrees in
southeast georgia ahead of cold front. Chances of showers should
arrive to most areas Monday afternoon as the front begins to shift
over the region. Dry high pressure will then return on Tuesday and
persist into the middle of next week. Temps will be slightly cooler
behind the front, but should remain a few degrees above normal. In
general, Tuesday and Wednesday afternoon temps should peak in the
lower 60s. Overnight lows should range in the low mid 40s.

Aviation 00z Thursday through Monday
Low level moisture will remain trapped at kchs through much of
the night, equating to low-endVFR or high-end MVFR ceilings
through 09z.VFR returns thereafter. There could be a little
very light rain or very light snow at the terminal early in the
taf period, but no impacts will occur.

At ksav there could be a period of low-endVFR ceilings from
about 03-07z, otherwiseVFR will prevail.

Both sites will experience gusty NW winds tonight, generally in
the 10-20 kt range with some higher gusts.

Extended aviation outlook: no significant concerns.

Marine
Based on NW winds of 20-25 kt at ft. Sumter and forecast
soundings showing similar values, we have gone ahead and raised
a small craft advisory for charleston harbor with the evening
update.

Strong pressure rises and ongoing cold advection will result in
small craft advisories for all atlantic waters tonight. NW winds
will peak in the 15-25 knot range with gusts of 25-30 kt. Seas
on average will be 3 to 5 feet nearshore, 5 to 7 feet in the
outer waters.

Thursday through Monday: winds seas will improve Thursday as the
pressure gradient and cold advection wane, with the offshore waters
dropping below advisory levels in the early-mid afternoon. No other
significant concerns thereafter through next Monday.

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

The downtown charleston observation site (chls1 kcxm) remains
out of service until further notice.

Chs watches warnings advisories
Ga... Wind chill advisory from 4 am to 8 am est Thursday for
gaz116>119-137>141.

Sc... Wind chill advisory from 4 am to 8 am est Thursday for
scz048>052.

Marine... Small craft advisory until 7 am est Thursday for amz350-352-
354.

Small craft advisory until 1 pm est Thursday for amz374.

Small craft advisory until 4 am est Thursday for amz330.

Near term...

short term... Rjb
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 12 mi39 min 37°F 46°F1025.3 hPa
SAXG1 - Sapelo Island Reserve, GA 36 mi87 min WNW 12 39°F 1025 hPa (+2.0)22°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 37 mi37 min WNW 25 G 29 41°F 52°F5 ft1024.1 hPa (+1.4)23°F
41033 43 mi79 min NW 14 G 21 35°F 47°F1023.8 hPa

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hunter U. S. Army Airfield, GA10 mi31 minWNW 1410.00 miFair35°F15°F45%1025.1 hPa
Savannah-Hilton Head International Airport, GA18 mi34 minNW 10 G 1710.00 miFair35°F14°F42%1025.9 hPa

Wind History from SVN (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmW3CalmW5CalmW8NW8NW11NW12NW10W10W11
G19
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1 day agoCalmCalmCalmCalmCalmCalmCalmN3CalmCalmCalmCalmNE5NE6NE4CalmCalmE4E3SE5SE6E7E4SE4
2 days agoN3NE5N4NE3N4N4N3N3NE3NE6N4N4NE5NE5N6CalmNE6NW4NW6NE6NW3CalmCalmN3

Tide / Current Tables for Vernon View, Burnside River, Georgia
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Vernon View
Click for Map
Wed -- 02:27 AM EST     -0.20 feet Low Tide
Wed -- 07:24 AM EST     Sunrise
Wed -- 07:41 AM EST     Moonrise
Wed -- 08:52 AM EST     7.86 feet High Tide
Wed -- 03:07 PM EST     -0.07 feet Low Tide
Wed -- 05:44 PM EST     Sunset
Wed -- 06:27 PM EST     Moonset
Wed -- 09:00 PM EST     6.95 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.50.9-0.1-012.84.76.47.57.87.364.22.30.7-0.10.41.73.55.36.56.96.55.3

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Wed -- 12:06 AM EST     -1.56 knots Max Ebb
Wed -- 02:57 AM EST     0.00 knots Slack
Wed -- 05:37 AM EST     1.97 knots Max Flood
Wed -- 07:23 AM EST     Sunrise
Wed -- 07:40 AM EST     Moonrise
Wed -- 09:25 AM EST     -0.00 knots Slack
Wed -- 01:02 PM EST     -2.01 knots Max Ebb
Wed -- 03:41 PM EST     0.00 knots Slack
Wed -- 05:43 PM EST     Sunset
Wed -- 06:04 PM EST     1.85 knots Max Flood
Wed -- 06:25 PM EST     Moonset
Wed -- 09:36 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.6-1.5-10.11.21.91.91.61.20.4-0.6-1.5-1.9-2-1.8-0.90.41.51.91.61.20.5-0.4-1.2

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 (20,4,5,8)
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Ground Weather Radar Station Charleston, SC
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weather_mapweather_map weather_map

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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.