Saturday, September23, 2017 L-36.com


Marine Weather and Tides
Whitemarsh 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 7:12AMSunset 7:20PM Saturday September 23, 2017 4:14 PM EDT (20:14 UTC) Moonrise 9:20AMMoonset 8:43PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 353 Pm Edt Sat Sep 23 2017
.small craft advisory in effect through Monday evening...
Tonight..NE winds 15 kt with gusts to 20 kt. Seas 4 to 6 ft.
Sun..NE winds 15 kt with gusts to 20 kt. Seas 5 to 7 ft.
Sun night..NE winds 10 to 15 kt. Seas 5 to 7 ft.
Mon..N winds 10 kt. Seas 5 to 7 ft, subsiding to 4 to 6 ft in the afternoon.
Mon night..NE winds 5 to 10 kt, becoming N after midnight. Seas 4 to 6 ft.
Tue..N winds 5 to 10 kt. Seas 4 to 5 ft.
Tue night..NW winds 5 to 10 kt. Seas 4 to 5 ft.
Wed..NW winds 5 to 10 kt. Seas 3 to 4 ft.
Wed night..W winds 5 to 10 kt. Seas 2 to 3 ft.
Thu..W winds 5 to 10 kt. Seas 1 foot.
Thu night..SW winds 5 to 10 kt. Seas 1 foot.
AMZ300 353 Pm Edt Sat Sep 23 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail this weekend. The high will weaken and shift inland as hurricane maria tracks northward off the southeast u.s. Coast into the first half of next week. A cold front may approach the forecast area late next week.

7 Day Forecast for Marine Location Near Whitemarsh Island, GA
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location: 32.08, -81.03     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 231723
afdchs
area forecast discussion
national weather service charleston sc
123 pm edt Sat sep 23 2017

Synopsis
High pressure will prevail through this weekend. The high will
weaken and shift inland as hurricane maria tracks northward off
the southeast u.S. Coast through the first half of next week. A
cold front could approach the forecast area late next week.

Near term through tonight
Today: an enhancement of deeper moisture along the south ga and
north fl coasts will result in modest moisture advection across
southeast ga, most noticeable to the south of i-16 and
especially closer to the altamaha river entrance. We maintained
chances of showers or perhaps isolated tstms in our far southern
zones, but mainly slight chance pops not quite up to i-16. Dry
weather will prevail across most of southeast sc with silent
pops along immediate coastal areas south of charleston. Highs
are on track for the upper 80s with the most sunshine north and
more clouds far south. Northeast to east winds will persist, but
mainly be light inland from the beaches and barrier islands.

Tonight: it should be dry all areas as high pressure remains in
control. Some clouds may linger ga zones with mostly clear
skies further north. We cannot rule out some patchy fog again
tonight, but winds look to be more elevated in the boundary
layer and we have not put any fog in our forecast at this point.

Short term Sunday through Tuesday
Dry high pressure will remain situated over the forecast area Sunday
and Monday as hurricane maria travels north offshore. Models are in
good agreement through this period and appear too dry to support
mentionable precipitation over land zones in the forecast. Small
probability exists for periodic showers Tuesday, primarily over the
coastal waters as maria transits past the region. Above normal
temperatures will persist, with highs in the mid to upper 80s and
lows in the mid to upper 60s, around 70 at the beaches.

Long term Tuesday night through Saturday
Despite the presence of maria offshore, weak NVA under high pressure
should help mitigate precipitation chances locally, with the best
chances for showers thunderstorms occurring late week into early
next weekend associated with an approaching cold front. The front
appears poised to cross the appalachians Thursday into Friday, with
passage through the forecast area likely by early Saturday. Above
average temperatures are expected through the second half of the
week in advance of the front, with cooler temperatures and lower
dewpoints likely behind the front as cool high pressure builds back
into the area.

Aviation 17z Saturday through Wednesday
Vfr will prevail into tonight. There is a small risk for a
passing shower at ksav today, but probabilities are too low to
include mention in the taf. Late tonight and around daybreak
Sunday, patchy fog and low clouds are possible. Confidence is
too low to include this in the current tafs.

Extended aviation outlook: mainlyVFR conditions expected. Low
probability for brief flight restrictions in early morning fog
and or low clouds Saturday morning at either terminal. Low
probability for brief restrictions due to isolated shower and
thunderstorm Saturday afternoon evening, primarily affecting
ksav.

Marine
Swell from maria is moving through our waters. The NOAA buoys
are reporting swell ranging from 4-6 ft and periods anywhere
from 11-14 seconds. Swell will continue to gradually build into
tonight and small craft advisories are in effect for all of the
coastal waters. Winds will also be on a bit of an uptick today
as the gradient gradually becomes a bit tighter thanks to the
moisture gradients between drier air inland and the north-
northwest advancing deep moisture from maria. By tonight, steady
15-20 knot flow with higher gusts across ga waters, especially
on the outside of the pilot buoy.

Sunday through Wednesday: a prolonged period of small craft
advisories is expected due to high seas pushing into the waters from
offshore hurricane maria. Winds will generally vary NE to N 15 to 20
knots with some gusts to 25 knots anticipated through the early part
of the week before backing NW early Wednesday.

Rip currents: swell from offshore hurricane maria will slowly
build at the beaches as northeast winds increase. A high risk
continues into this evening. Due to the presence of hurricane
maria offshore, increased chances for life-threatening rip
currents will persist into mid-week.

Tides coastal flooding
Powerful surf created by offshore hurricane maria will drive
significant wave run-up, which could cause further beach erosion
this weekend into early next week. High surf advisories may be
required. Also, the potential for shallow salt water flooding
will persist through early next week around the times of high
tide, particularly along the south carolina coast.

Chs watches warnings advisories
Ga... High risk for rip currents until 8 pm edt this evening for gaz117-
119-139-141.

Sc... High risk for rip currents until 8 pm edt this evening for
scz048>051.

Marine... Small craft advisory until 8 pm edt Tuesday for amz352.

Small craft advisory until 4 pm edt Wednesday for amz350-374.

Small craft advisory until 11 pm edt Monday for amz354.

Near term...

short term... Jmc
long term... Jmc
aviation...

marine...

tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 7 mi45 min ENE 15 G 18 80°F 81°F1015.9 hPa
41033 36 mi67 min ENE 14 G 18 80°F 1022.5 hPa
ACXS1 - ACE Basin Reserve, SC 45 mi90 min ENE 2.9 87°F 1016 hPa69°F
SAXG1 - Sapelo Island Reserve, GA 48 mi75 min Calm 82°F 1015 hPa (-1.0)74°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 48 mi85 min ENE 18 G 21 80°F 81°F5 ft1014.7 hPa (-0.4)73°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hunter U. S. Army Airfield, GA7 mi77 minENE 12 G 2010.00 miA Few Clouds85°F71°F64%1015.1 hPa
Savannah-Hilton Head International Airport, GA10 mi22 minESE 1210.00 miMostly Cloudy87°F68°F53%1015 hPa
Hilton Head Island, Hilton Head Airport, SC20 mi25 minE 1010.00 miClear82°F71°F70%1015.6 hPa

Wind History from SVN (wind in knots)
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Last 24hrE8E8E8E5E3CalmCalmCalmCalmCalmCalmCalmN3N3CalmCalmN3N6N4E8NE7E13NE12
G20
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1 day agoSE7S6S4S4CalmCalmCalmSE4CalmCalmCalmCalmCalmN4N3N3NE5NE5NE6E6E8E10E6E10
2 days agoNE12
G27
SE6S6SE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW3CalmN3CalmCalmE4SE8

Tide / Current Tables for Fort Jackson, Savannah River, Georgia
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Fort Jackson
Click for Map
Sat -- 05:34 AM EDT     0.13 feet Low Tide
Sat -- 07:13 AM EDT     Sunrise
Sat -- 10:20 AM EDT     Moonrise
Sat -- 11:26 AM EDT     8.24 feet High Tide
Sat -- 06:02 PM EDT     0.38 feet Low Tide
Sat -- 07:19 PM EDT     Sunset
Sat -- 09:43 PM EDT     Moonset
Sat -- 11:31 PM EDT     7.93 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.86.64.93.11.50.30.31.63.75.87.48.28.17.56.14.42.61.10.41.12.95.16.97.8

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Sat -- 03:12 AM EDT     -2.00 knots Max Ebb
Sat -- 05:49 AM EDT     0.00 knots Slack
Sat -- 07:12 AM EDT     Sunrise
Sat -- 08:23 AM EDT     2.15 knots Max Flood
Sat -- 10:19 AM EDT     Moonrise
Sat -- 12:16 PM EDT     -0.00 knots Slack
Sat -- 03:51 PM EDT     -2.16 knots Max Ebb
Sat -- 06:25 PM EDT     0.01 knots Slack
Sat -- 07:18 PM EDT     Sunset
Sat -- 08:49 PM EDT     2.01 knots Max Flood
Sat -- 09:43 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.2-1.2-1.8-2-1.9-1.10.21.52.12.11.71.10.3-0.8-1.6-2-2.2-1.7-0.60.81.821.71.2

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 (16,3,4,5)
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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.