Tuesday, September26, 2017 L-36.com


Marine Weather and Tides
Tybee 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 7:14AMSunset 7:15PM Tuesday September 26, 2017 2:02 PM EDT (18:02 UTC) Moonrise 12:00PMMoonset 10:42PM Illumination 35% Phase: Waxing Crescent; Moon at 6 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- 1232 Pm Edt Tue Sep 26 2017
This afternoon..NW winds 10 kt. Seas 3 to 5 ft.
Tonight..NW winds 5 to 10 kt. Seas 3 to 4 ft.
Wed..NW winds 5 to 10 kt, becoming W in the afternoon. Seas 2 to 3 ft.
Wed night..W winds 5 to 10 kt. Seas 2 ft.
Thu..NW winds 5 to 10 kt, becoming sw in the afternoon. Seas 1 to 2 ft.
Thu night..SW winds 5 to 10 kt. Seas 1 to 2 ft.
Fri..NE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Fri night..E winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Sat..NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Sat night..NE winds 15 to 20 kt. Seas 4 to 6 ft. A chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 1232 Pm Edt Tue Sep 26 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Hurricane maria will track northward off the southeast u.s. Coast through midweek before turning east-northeast and away from the coast into late week. A cold front will move through the area by early this weekend, followed by high pressure into early next week.

7 Day Forecast for Marine Location Near Tybee Island city, GA
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location: 32.03, -80.85     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 261636
afdchs
area forecast discussion
national weather service charleston sc
1236 pm edt Tue sep 26 2017

Synopsis
Hurricane maria will track northward off the southeast u.S.

Coast through midweek before turning east-northeast and away
from the coast into late week. A cold front will move through
the area by early this weekend, followed by high pressure into
early next week.

Near term until 6 pm this evening
A warm, downslope flow will dominate this afternoon as the
broad, cyclonic circulation around hurricane marine impacts the
region. Cumulus developing across southeast georgia should mix
out over the next few hours while occasional bands of
stratocumulus rotate into the charleston tri-county area. No
major changes were made for the early afternoon update.

Short term 6 pm this evening through Friday
Tonight: maria will continue her motion northward to a position
to the E of CAPE hatteras by morning. The environment locally
remains warm and dry, with only a little wrap-around cirrus
and or altocumulus to occur around the tropical cyclone across
our sc zones. Light or calm winds away from the immediate coast
will result in decent radiational cooling to get temps down into
the upper 60s and lower 70s. This is still a good 5-7f above
late september normals.

Wednesday through Friday: dry conditions are expected to
continue through Thursday as maria moves away from the area. A
warming trend with above normal temperatures will persist, with
most locations reaching lower 90s Wednesday and Thursday. A cold
front near the area Thursday should complete passage through
the forecast area by late Friday or early Saturday, bringing
slightly increased shower thunderstorm chances. Temperatures
Friday should peak in the upper 80s most locations with some
locations nearing 90 in southwestern zones, but uncertainty in
cloud cover and precipitation placement timing remains. Low
temperatures will range from the upper 60s to lower 70s through
the period.

Long term Friday night through Monday
High surface pressure will begin filling back into the area later
Friday into the weekend behind the departing cold front. Elevated
probabilities for precipitation will linger behind frontal passage
as a sharpening upper level trough crosses the forecast area
Saturday. Ridging aloft will follow this feature and a weak high
pressure wedge-type pattern could set up near or just inland from
the area later Saturday into Sunday and persist into early next
week.

Aviation 18z Tuesday through Sunday
Primary concerns:
* none
vfr through the period for both kchs and ksav.

Extended aviation outlook: mainlyVFR conditions are expected, with
low probabilities for morning restrictions due to fog, mainly
Wednesday and Thursday.

Marine
Today and tonight: the large cyclonic pressure pattern
surrounding TC maria will prevail across the maritime community.

Since we're so far away to the W and sw, winds won't be a
problem, but elevated seas comprised mostly of large and long
period swells will persist. As a result we still have sca's in
effect for charleston county atlantic waters and the outer ga
waters, with significant wave heights as high as 6 ft within 20
nm, and up to 8 ft further offshore. However, as maria gains
some latitude, seas will slowly continue to subside this
afternoon and tonight, and the only SCA remaining by sunset
will be on the amz374 waters for 6 or 7 foot seas. The other
waters will have nothing more than 4 or 5 ft by that time.

Wednesday through Sunday: lingering 6 foot seas in the offshore
ga waters should drop below small craft advisory criteria by
mid-day Wednesday. Conditions will then remain rather tranquil
through late week with winds peaking 10-15 knots and seas
generally ranging 2-4 feet. NE winds will begin increasing early
Saturday in response to a tightening pressure gradient, peaking
around 20 knots with gusts to 25 knots, and seas increasing in
response. Small craft advisory conditions will be possible again
by Saturday afternoon and could persist into early next week.

Rip currents: there remains a solid 3 or 4 foot swell impacting
the beaches today, arriving around every 12 seconds. This is
more than enough to generate a moderate risk of rip currents.

With a strong pinching of winds and the resulting increase in
seas this weekend, another round of enhanced rip current risk
seems likely.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 4 pm edt Wednesday for amz374.

Small craft advisory until 5 pm edt this afternoon for amz350.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 3 mi45 min N 7 G 12 83°F 81°F1012.5 hPa
41033 29 mi55 min NNW 5.8 G 9.7 82°F 1019 hPa
ACXS1 - ACE Basin Reserve, SC 42 mi78 min NNW 1.9 86°F 1012 hPa73°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 44 mi73 min NNW 9.7 G 14 79°F 81°F4 ft1012.4 hPa (-0.5)69°F
SAXG1 - Sapelo Island Reserve, GA 48 mi63 min Calm 85°F 1013 hPa (-1.0)72°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, SC15 mi73 minNNW 810.00 miClear86°F69°F59%1012.5 hPa
Hunter U. S. Army Airfield, GA16 mi2.1 hrsNW 910.00 miFair85°F68°F58%1012.8 hPa
Savannah-Hilton Head International Airport, GA20 mi70 minN 910.00 miA Few Clouds89°F69°F52%1012.7 hPa

Wind History from HXD (wind in knots)
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Last 24hrN7N7N7N9NE9NE8N6N5N5N5N5N7NE6CalmCalmCalmW4SW6SW6NW10NW10--N8N8
1 day agoNE11E7NE5NE8NE6NE6NE5NE4NE4NE3CalmN3CalmN6N6N9N8Calm--N8N12N12N7N7
2 days agoNE9NE11E10E10E7E7E7E7E6NE75E75NE6N6N7N9----NE9N9N11N11NE11

Tide / Current Tables for Tybee Light, Savannah River, Georgia
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Tybee Light
Click for Map
Tue -- 12:32 AM EDT     6.60 feet High Tide
Tue -- 06:30 AM EDT     1.17 feet Low Tide
Tue -- 07:14 AM EDT     Sunrise
Tue -- 01:00 PM EDT     Moonrise
Tue -- 01:06 PM EDT     6.95 feet High Tide
Tue -- 07:14 PM EDT     Sunset
Tue -- 07:15 PM EDT     1.57 feet Low Tide
Tue -- 11:42 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.56.55.94.73.321.31.32.13.34.65.86.66.96.75.84.63.32.21.61.82.63.74.9

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Tue -- 01:53 AM EDT     -0.00 knots Slack
Tue -- 04:27 AM EDT     -1.50 knots Max Ebb
Tue -- 07:14 AM EDT     Sunrise
Tue -- 07:57 AM EDT     0.00 knots Slack
Tue -- 10:32 AM EDT     1.70 knots Max Flood
Tue -- 01:00 PM EDT     Moonrise
Tue -- 02:32 PM EDT     -0.00 knots Slack
Tue -- 05:46 PM EDT     -1.53 knots Max Ebb
Tue -- 07:14 PM EDT     Sunset
Tue -- 08:45 PM EDT     0.00 knots Slack
Tue -- 11:07 PM EDT     1.52 knots Max Flood
Tue -- 11:42 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.10.6-0.1-1-1.5-1.5-1.3-0.8011.61.61.30.90.4-0.4-1.2-1.5-1.5-1.4-0.70.31.11.5

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 (14,3,4,5)
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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.