Monday, December10, 2018 L-36.com


Marine Weather and Tides
Garden City, GA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:13AMSunset 5:21PM Monday December 10, 2018 7:58 PM EST (00:58 UTC) Moonrise 9:54AMMoonset 8:24PM Illumination 12% 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- 630 Pm Est Mon Dec 10 2018
Tonight..NW winds 10 to 15 kt. Seas 2 to 3 ft.
Tue..NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft.
Tue night..NW winds 10 to 15 kt. Seas 3 to 4 ft.
Wed..W winds 5 to 10 kt. Seas 2 ft.
Wed night..W winds 5 kt, becoming N after midnight. Seas 2 ft in the evening, then seas 1 foot.
Thu..E winds 5 to 10 kt. Seas 1 to 2 ft. A slight chance of showers in the afternoon.
Thu night..SE winds 10 to 15 kt. Seas 2 to 3 ft, building to 4 to 5 ft after midnight. A chance of showers.
Fri..S winds 15 to 20 kt. Seas 4 to 6 ft. Showers likely with a slight chance of tstms.
Fri night..SW winds 15 to 20 kt. Seas 4 to 6 ft. A chance of showers.
Sat..W winds 15 to 20 kt. Seas 4 to 5 ft. A slight chance of showers.
Sat night..W winds 10 to 15 kt. Seas 3 to 4 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 630 Pm Est Mon Dec 10 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A trough will move offshore tonight. High pressure will prevail Tuesday through Thursday. A storm system will affect the area Thursday night into Saturday, followed by another area of high pressure.


7 Day Forecast for Marine Location Near Garden City, GA
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location: 32.07, -81.11     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 110004
afdchs
area forecast discussion
national weather service charleston sc
704 pm est Mon dec 10 2018

Synopsis
A trough will move offshore tonight. High pressure will prevail
Tuesday through Thursday. A storm system will affect the area
Thursday night into Saturday, followed by another area of high
pressure.

Near term until 6 am Tuesday morning
Early evening goes-e water vapor imagery shows a strung out h5
trough extending across the deep south into the mid-atlantic
with an h7 vorticity center near augusta, ga. The trough
continues to produce modest upward vertical motion as it
interacts with a pronounced polar jet stretching from the
northeast gulf of mexico to a position well northeast of the
north carolina outer banks. Bands of light to occasionally
moderate rainfall continue to blossom ahead of the trough per
kcae and kjgx reflectivity trends with surface observations
showing vsbys ranging from 2-4sm in the rain.

High resolution guidance members are similar in dropping the
area of light rain currently over the south carolina midlands
back into central georgia east southeast into portions of
southeast south carolina and southeast georgia after midnight.

Pops to 20-30% were maintained across the western, central and
and northern zones with rain-free conditions persisting across
the far south. There are signals that the rain could mix with
some frozen precipitation after midnight as low-level dry air
works south and diabatic cooling begins to cool the lowest
layers of the atmosphere. Although considerable dry air remains
in place in the mid-levels, significant moisture remains in
place from roughly the surface to about 6 kft. The moisture
depth is forecast to increase to about 8 kft with the approach
of the h5 trough with temperatures in the top of the cloud
layer forecast to cool to about -10c. This yields about a 70%
chance of ice nucleation in the cloud and should be sufficient
for a good percentage of the cloud's super-cooled water
droplets to crystallize. Rap soundings at kchs, krbw, kmks and
ktbr suggest the column will be cold enough to support some
degree of rain, sleet and snow mixture, but how warm the region
remains below 1500 ft is still unclear, especially as dewpoints
begin to fall as low-level dry air works south. With
precipitation rates expected to remain quite light, suspect
diabatic cooling will not be fully maximized, thus anticipate
the main hydrometeor phase to remain liquid with only occasional
bouts of sleet and snow mixing in at times. If pockets of
heavier precipitation rates can be obtained, then a brief change
over to all snow or sleet could occur. However, confidence on
this scenario is quite low. For now, maintained a mention of a
slight chance of snow and sleet in the grids for the western,
central and northern zones, including parts of the charleston
metro area.

Short term 6 am Tuesday morning through Thursday
Tuesday and Wednesday: the mid-levels will consist of a trough axis
spread along the southeast coast Tuesday morning. The trough will
quickly move offshore Tuesday afternoon. Zonal flow will develop
overhead late Tuesday night and prevail into Wednesday. The flow
will start to turn to the southwest Wednesday night as a strong
trough moves over the central u.S. At the surface, a trough will be
just offshore Tuesday morning, while high pressure is centered over
the lower ms valley. The trough will quickly move away Tuesday
afternoon. The center of the high will gradually move over the
southeast into Wednesday, then start shifting offshore Wednesday
night. Strong subsidence and a lack of moisture will keep the
forecast dry for this entire time period. Despite plenty of sun, a
chilly airmass will keep highs Tuesday about ten degrees below
normal. This temperature trend will continue into Tuesday night,
with many locations away from the immediate coast reaching freezing.

Temperatures moderate a few degrees on Wednesday as the winds
gradually shift to the sw. Though, temperatures will remain several
degrees below normal.

Thursday: the mid-levels will consist of southwest flow overhead as
a trough strengthens over the central u.S. At the surface, a trough
will start developing off the coast in the morning, strengthening
into the afternoon. Meanwhile, a strengthening storm system will
approach from the lower ms valley. Moisture will gradually increase
throughout the day. Though, models seem to keep the highest values
just off the coast or near the altamaha river. Some precipitation
could develop across the ga coastal waters late in the day and maybe
near the altamaha river. Hence, we have slight chance pops there.

Qpf will be minimal, if any. Despite increasing clouds, warm air
advection should allow temperatures to reach normal values for this
time of year.

Long term Thursday night through Monday
A deep-layered low pressure system will affect the southeast us
Thursday night through Friday night, bringing fairly widespread
showers and perhaps some thunderstorms. Mainly dry weather
expected behind the storm system with temperatures at or
slightly below normal.

Aviation 00z Tuesday through Saturday
Cigs will remain near ifr MVFR thresholds for much of the night
with kchs expected to trend closer at or below upper-end ifr.

Could see a brief period of a rain sleet mix at kchs as a band
of light precipitation approaches from the west around 08z, but
no impacts are anticipated.VFR will return closer to daybreak
and continue for the remainder of the 00z TAF cycle.

Extended aviation outlook: MVFR or lower conditions could
return late Thursday through Friday night as a storm system
affects the area.

Marine
Tonight: a trough will move south through the waters with winds
shifting more solidly out of the northwest in the ga waters and
north-northwest in the sc waters. Speeds should stay below
advisory levels, mainly in the 15-20 knot range, although some
25 knot gusts are possible can't completely be ruled out
especially in the outer georgia waters. Seas will build a bit,
mainly becoming 3-5 feet in the nearshore waters and 4-6 feet
in the outer waters where the small craft advisory remains in
effect.

Tuesday through Saturday: a small craft advisory should remain
in effect for the ga waters beyond 20 nm through Tuesday
evening, mainly due to seas. High pressure will build across the
southeast Tuesday and Wednesday, allowing both winds and seas
to trend downwards. The next round of marine headlines is
expected Thursday night through Saturday night as a strong low
pressure system moves through the southeast u.S.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until midnight est Tuesday night for
amz374.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 11 mi47 min W 8 G 11 43°F 53°F1020.4 hPa
41033 40 mi111 min NNW 9.7 G 12 44°F 56°F1018.9 hPa
SAXG1 - Sapelo Island Reserve, GA 46 mi119 min NW 6 43°F 1020 hPa (+2.0)39°F
ACXS1 - ACE Basin Reserve, SC 48 mi74 min Calm 42°F 1019 hPa41°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 48 mi69 min WNW 12 G 16 45°F 59°F2 ft1019.9 hPa (+1.5)39°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, GA3 mi63 minWNW 810.00 miOvercast42°F37°F82%1019.6 hPa
Savannah-Hilton Head International Airport, GA7 mi66 minWNW 710.00 miOvercast42°F37°F85%1020.4 hPa
Hilton Head Island, Hilton Head Airport, SC24 mi69 minS 410.00 miOvercast43°F39°F87%1020 hPa

Wind History from SVN (wind in knots)
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Last 24hr--NW5N4NW4W4--W5W6W4NW5W6W6NW8W6NW9NW7W9W10NW9NW7W7W5W4W8
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2 days agoCalmCalmCalmCalmCalmCalmCalmNE3N3N3NE4NE4NE4NE5NE7NE9NE10
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Tide / Current Tables for Savannah (Bull Street), Georgia
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Savannah (Bull Street)
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Mon -- 04:20 AM EST     0.22 feet Low Tide
Mon -- 07:14 AM EST     Sunrise
Mon -- 09:53 AM EST     Moonrise
Mon -- 10:16 AM EST     8.39 feet High Tide
Mon -- 04:59 PM EST     0.35 feet Low Tide
Mon -- 05:20 PM EST     Sunset
Mon -- 08:24 PM EST     Moonset
Mon -- 10:23 PM EST     7.47 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.94.22.51.10.30.524.16.27.78.48.27.564.22.410.31.12.94.96.67.47.3

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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Mon -- 01:58 AM EST     -2.28 knots Max Ebb
Mon -- 05:14 AM EST     0.00 knots Slack
Mon -- 07:13 AM EST     Sunrise
Mon -- 07:37 AM EST     1.64 knots Max Flood
Mon -- 09:52 AM EST     Moonrise
Mon -- 10:43 AM EST     -0.00 knots Slack
Mon -- 02:27 PM EST     -2.57 knots Max Ebb
Mon -- 05:19 PM EST     Sunset
Mon -- 06:00 PM EST     0.00 knots Slack
Mon -- 08:05 PM EST     1.28 knots Max Flood
Mon -- 08:23 PM EST     Moonset
Mon -- 10:58 PM EST     -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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-1.2-2-2.3-2-1.2-0.20.81.51.61.10.5-0.2-1.1-1.9-2.5-2.5-1.9-1.1-00.91.31.10.5-0

Weather Map and Satellite Images
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GOES 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 (19,4,5,8)
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Ground Weather Radar Station Charleston, SC
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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.