Tuesday, September17, 2019 L-36.com


Marine Weather and Tides
Skidaway Island, GA

Version 3.4
NOTICE
9/4/2019 Fixed the weather maps due to NOAA moving them.
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 7:07AMSunset 7:29PM Tuesday September 17, 2019 12:22 AM EDT (04:22 UTC) Moonrise 8:41PMMoonset 9:03AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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- 1036 Pm Edt Mon Sep 16 2019
Overnight..N winds 5 to 10 kt. Seas 3 to 4 ft.
Tue..NE winds 10 to 15 kt. Seas 3 to 4 ft, building to 4 to 5 ft in the afternoon.
Tue night..E winds 10 kt. Seas 4 to 5 ft. A slight chance of showers after midnight.
Wed..NE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 4 to 5 ft, building to 4 to 6 ft in the afternoon. A slight chance of showers and tstms.
Wed night..NE winds 15 to 20 kt. Seas 4 to 6 ft. A slight chance of showers and tstms in the evening.
Thu..NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft, building to 5 to 7 ft in the afternoon. A slight chance of showers.
Thu night..NE winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft, subsiding to 4 to 6 ft after midnight. A slight chance of showers.
Fri..NE winds 15 to 20 kt. Seas 4 to 6 ft. A slight chance of showers.
Fri night..E winds 10 to 15 kt. Seas 4 to 6 ft. A slight chance of showers.
Sat..E winds 10 to 15 kt. Seas 3 to 4 ft.
Sat night..SE winds 10 to 15 kt. Seas 2 to 3 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 1036 Pm Edt Mon Sep 16 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Hurricane humberto will continue to move away from the coast through mid week. A cold front will advance through the area Wednesday, followed by high pressure into early 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 170235
afdchs
area forecast discussion
national weather service charleston sc
1035 pm edt Mon sep 16 2019

Synopsis
Hurricane humberto will continue to move away from the coast
through mid week. A cold front will advance through the area
Wednesday, followed by high pressure into early next week.

Near term until 6 am Tuesday morning
Temperatures have cooled down rapidly in many areas following
sunset, mainly due to the lower than anticipated dew points.

Toss in the light calm winds and clear skies, radiational
cooling should be enhanced. We lowered the minimum temperatures
2-3 degrees. It's possible this may not be enough in some
locations.

Short term 6 am Tuesday morning through Thursday
Tuesday: as hurricane humberto accelerates away from the area, the
pressure gradient across the area will weaken. Sinking motion across
the area in the wake of humberto combined with compressional heating
ahead of a backdoor cold front will help low level temperatures and
thickness values to increase. As a result, with abundant sunshine it
will be rather hot especially for mid september. Raised high
temperatures a degree or two in most areas away from the coast with
highs generally in lower to mid 90s away from the coast. Heat
indices will only reach 95 to 100 away from the coast as low level
dew points mix out a bit during the afternoon. Moisture and cloud
cover increase Tuesday night and there could be a shower or two
along the coast during the later half of the night. However, will
maintain a silent 10 percent pops in the forecast due to the
expected limited coverage.

Wednesday: as the backdoor cold front pushes through the area from
north to south, there could be a few showers. Cooling temperatures
aloft support some instability especially during the afternoon. As a
result, think there could be a few thunderstorms along and ahead of
the front. Kept it dry in the north where the front will move
through before any instability can develop. Limited moisture and
instability should keep rain chances in the slight chance category.

Cooler and drier air will advect into the area from the north behind
the front. High temperatures should range from 80-85 across
southeast south carolina to the upper 80s across mainly interior
southeast georgia. As the back door cold front pushes south of the
area, the threat for precipitation will end in the south Wednesday
evening. It will be much cooler by Thursday morning with lows
ranging from near 60 in the north away from the coast to near 70
along the coast in southeast georgia.

Thursday: cooler and less humid conditions are expected for all
areas with highs ranging from the upper 70s along the south santee
river to the mid 80s to the west of i-95 and south of i-16. Breezy
conditions are likely near the coast, especially for the beaches and
barrier islands.

Long term Thursday night through Monday
Deep layered ridging will persist over the region late week
into early next week, bringing near climo temps and dry weather
for the forecast area.

Aviation 03z Tuesday through Saturday
00z tafs:VFR.

Extended aviation outlook: patchy fog is possible around the
terminals around daybreak Wednesday, flight restrictions appear
unlikely at this time. Otherwise,VFR.

Marine
Tonight: seas from buoy 41004 dropped another foot from what was
forecasted earlier. After accounting for this in the updated
forecast, we opted to drop the small craft advisory for amz352.

The other zones (amz350 and amz354) didn't need any changes
with their advisories. Those zones could have NE winds as high
as 25 kt this evening with hazardous seas.

Tc humberto will continue to impact the coastal waters on Tuesday
and Tuesday night with large swells and modest northeast winds. The
swells will begin to decrease by Wednesday, but the northeast winds
will increase behind the backdoor cold front on Wednesday prolonging
the small craft advisory conditions for amz350 and amz374. Looks
like significant improvement in marine conditions is unlikely until
late week especially for amz350 and amz374. The gradient and overall
winds and seas should subside this weekend as broad high pressure
blankets the southeast states.

Rip currents: moderate risk at all beaches Tuesday due mainly
to earlier rip current reports and continued elevated long
period swell emanating from hurricane humberto. The rip current
risk will then remain elevated throughout at least midweek as
the large swells from hurricane humberto continue. The rip
current risk could remain elevated perhaps through the end of
the week as northeast winds and the longshore currents
strengthen behind the backdoor cold front.

Tides coastal flooding
Low chances for minor coastal flooding around the times of high
tide through late week, especially along the south carolina
coast.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 8 pm edt Saturday for amz374.

Small craft advisory until 6 pm edt Friday for amz350.

Near term...

short term... Mte
long term...

aviation... Mte spr
marine... Mte spr
tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 12 mi58 min Calm G 1 80°F 83°F1014.7 hPa
SAXG1 - Sapelo Island Reserve, GA 36 mi82 min Calm 75°F 1014 hPa (+1.0)72°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 37 mi32 min NNE 3.9 G 5.8 81°F 83°F5 ft1013.5 hPa (+0.0)77°F
41033 43 mi74 min NE 3.9 G 7.8 81°F 83°F1014.5 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 mi86 minW 310.00 miFair75°F71°F87%1013.8 hPa
Savannah-Hilton Head International Airport, GA18 mi89 minN 010.00 miA Few Clouds78°F70°F76%1014.5 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hr----N6------N7N7------N11
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NE8N9------E4CalmCalmW3
1 day ago------------NE7--N7--NE9NE10E12
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2 days agoNE5NE6--N5------NE5NE10--NE9NE10NE10NE7--E10E11
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Tide / Current Tables for Vernon View, Burnside River, Georgia
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Vernon View
Click for Map
Tue -- 05:14 AM EDT     0.65 feet Low Tide
Tue -- 07:09 AM EDT     Sunrise
Tue -- 10:03 AM EDT     Moonset
Tue -- 11:17 AM EDT     8.08 feet High Tide
Tue -- 05:31 PM EDT     1.06 feet Low Tide
Tue -- 07:27 PM EDT     Sunset
Tue -- 09:40 PM EDT     Moonrise
Tue -- 11:38 PM EDT     7.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.56.54.93.11.50.712.34.36.17.48.17.96.95.53.82.21.21.22.23.85.56.87.5

Tide / Current Tables for Savannah River Entrance, Georgia Current (2) (expired 1999-12-31)
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Savannah River Entrance
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Tue -- 03:04 AM EDT     -2.43 knots Max Ebb
Tue -- 06:24 AM EDT     0.00 knots Slack
Tue -- 07:08 AM EDT     Sunrise
Tue -- 08:46 AM EDT     1.62 knots Max Flood
Tue -- 10:02 AM EDT     Moonset
Tue -- 11:33 AM EDT     -0.00 knots Slack
Tue -- 03:26 PM EDT     -2.40 knots Max Ebb
Tue -- 06:48 PM EDT     0.00 knots Slack
Tue -- 07:26 PM EDT     Sunset
Tue -- 09:06 PM EDT     1.50 knots Max Flood
Tue -- 09:39 PM EDT     Moonrise
Tue -- 11:42 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.6-1.4-2.1-2.4-2.2-1.4-0.40.61.41.61.20.4-0.3-1.1-1.8-2.3-2.3-1.7-0.80.21.11.51.20.5

Weather Map
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GEOS Local Image of    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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Wind Forecast for Charleston, SC (0,6,7,8)
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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.