Sunday, December16, 2018 L-36.com


Marine Weather and Tides
Henderson, 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 7:18AMSunset 5:24PM Sunday December 16, 2018 9:14 PM EST (02:14 UTC) Moonrise 1:28PMMoonset 12:54AM Illumination 71% Phase: Waxing Gibbous; Moon at 9 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- 555 Pm Est Sun Dec 16 2018
Tonight..W winds 15 to 20 kt, becoming nw 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 ft after midnight.
Mon..W winds 5 to 10 kt. Seas 2 ft.
Mon night..NW winds 5 to 10 kt. Seas 2 ft.
Tue..N winds 5 to 10 kt, becoming ne in the afternoon. Seas 2 ft.
Tue night..NE winds 5 to 10 kt. Seas 2 ft.
Wed..N winds 5 to 10 kt, becoming nw in the afternoon. Seas 2 ft.
Wed night..SE winds 5 kt. Seas 2 ft. A chance of showers.
Thu..S winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely.
Thu night..SW winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers.
Fri..W winds 20 to 25 kt. Seas 4 to 5 ft. A slight chance of showers.
Fri night..W winds 15 to 20 kt. Seas 3 to 4 ft.
AMZ300 555 Pm Est Sun Dec 16 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Dry high pressure is expected through the middle of the week. A storm system will likely impact the area with locally heavy rain late in the work week followed by cooler and drier high pressure next weekend.


7 Day Forecast for Marine Location Near Henderson, GA
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location: 32.03, -81.22     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 170045
afdchs
area forecast discussion
national weather service charleston sc
745 pm est Sun dec 16 2018

Synopsis
Dry high pressure is expected through the middle of the week. A
storm system will likely impact the area with locally heavy
rain late in the work week followed by cooler and drier high
pressure next weekend.

Near term until 6 am Monday morning
Clouds are finally eroding across southeast georgia, so the sky
forecast has been adjusted accordingly.

Previous discussion...

observational and satellite trends showing some erosion to the
stratus across our georgia counties, but it is still widespread
across a good part of the area south of savannah river. We have
slowed the decrease in cloudiness by a few hours, but still
anticipating that these clouds will further dissolve with
downslope flow developing and more of an anticyclonic flow to
the surface pattern. As a result of more cloud cover across our
georgia counties we have slowed the drop in temps, but in south
carolina where skies are mostly clear we have actually increased
the fall of temps a couple of degrees. Expect lows to make it
down to the lower 40s inland, mid or upper 40s close to the
shoreline, in downtown charleston and near lake moultrie.

Upstream scattered to broken cirriform clouds will have little
if any bearing on temps tonight, despite some increase in these
jet induced clouds.

Short term 6 am Monday morning through Wednesday
The mid-levels will consist of zonal flow overhead Monday morning.

Meanwhile, a ridge over the central u.S. Will move eastward while
weakening. It's axis is forecasted to pass overhead Tuesday, then
move offshore Tuesday night. A strengthening trough will develop
over the central u.S. On Wednesday, bringing our area southwest
flow. At the surface, a broad area of high pressure stretched across
the central u.S. Monday will gradually move eastward, passing to our
north Wednesday night. At that time, weak troughing starts
developing offshore. The trough may try to strengthen on Wednesday,
as the high moves off the mid-atlantic coast. Simply put, dry
weather is expected to prevail through Tuesday night. The models
hint at maybe some light showers developing along the coast
Wednesday afternoon in association with the trough. But there remain
enough differences in the models to keep mention of showers out of
the forecast for now. High temperatures will be several degrees
above normal Monday, near normal Tuesday, then back above normal on
Wednesday.

Long term Wednesday night through Sunday
Increasing moisture and forcing ahead of the next storm system looks
to increase rain chances Wednesday night and Thursday with some
improvement Thursday night, although there are some model
disagreements regarding timing. 1-2 inches of rain could fall,
especially near the coast given the elevated astronomical tide
levels. Instability appears low at this time so not anticipating any
thunderstorms but the best chances would likely be near the coast.

The bulk of the rain should be gone by Friday although some showers
could linger given continued upper forcing. Cooler and drier
conditions should then return for the weekend.

Aviation 01z Monday through Friday
The last of the MVFR ceilings at ksav will give way toVFR early
this evening, and remainVFR there and at kchs through 00z
Tuesday.

Extended aviation outlook:VFR through Tuesday night. Increasing
probabilities for flight restrictions Wednesday through Friday due
to a storm system. Also, gusty winds are possible on Friday.

Marine
Recent trends indicate that winds are a little stronger than we
had in the forecast, and we have adjusted them accordingly. This
will lead to W winds as high as 15 or 15-20 kt this evening,
turning NW and dropping about 5 kt after midnight as deep low
pressure near long island lifts NE through the night. As a
result of the higher winds we have bumped seas up about a foot
early on, before dropping overnight with a continued offshore
fetch.

Previous discussion...

this evening and tonight: a west wind will gradually turn northwest
through tonight between low pressure centered off the mid-
atlantic coast and high pressure building over the deep south,
then southeast late. In general wind speeds should peak near
10-15 kt with gusts up to 20 kt beyond 20 nm early tonight, then
gradually decrease through the remainder of the night as the
pressure gradient slowly weakens over all waters. Seas will
range between 2-3 ft in nearshore waters and 3-4 ft in offshore
georgia waters, then gradually subside late tonight.

Extended marine: high pressure nearby will bring tranquil conditions
to the waters through Thursday. A storm system will bring small
craft advisories to all of the waters, mainly Thursday night through
Friday night. Cannot rule out some gale force gusts as well
especially closer to the gulf stream.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term...

short term... Ms
long term... Rjb
aviation...

marine...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 17 mi63 min W 11 G 13 1019.2 hPa
SAXG1 - Sapelo Island Reserve, GA 42 mi75 min W 6 53°F 1019 hPa (+0.0)46°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 47 mi85 min WNW 16 G 19 54°F 58°F3 ft1019.2 hPa (+1.3)46°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, GA4 mi19 minWSW 310.00 miFair50°F42°F75%1018.9 hPa
Savannah-Hilton Head International Airport, GA8 mi22 minW 510.00 miA Few Clouds49°F45°F86%1019.4 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA21 mi79 minWSW 610.00 miPartly Cloudy51°F45°F81%1018.9 hPa

Wind History from SVN (wind in knots)
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Last 24hrCalmW3W4W4SW5W3W4W3W4W4W3W7NW11
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1 day agoSE7SE4S4SE3SW3SW4W3E4CalmSW4W5SW4SW5S4W10W9W13SW11W6SW3CalmCalmCalmCalm
2 days agoNE5CalmCalmNE4NE4NE6E4CalmCalmE3Calm--E5E7--NE6E8E8SE10S3CalmS5S8S7

Tide / Current Tables for Highway bridge, Ogeechee River, Georgia
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Highway bridge
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Sun -- 12:19 AM EST     0.13 feet Low Tide
Sun -- 12:54 AM EST     Moonset
Sun -- 05:23 AM EST     0.93 feet High Tide
Sun -- 07:18 AM EST     Sunrise
Sun -- 12:37 PM EST     0.19 feet Low Tide
Sun -- 01:27 PM EST     Moonrise
Sun -- 05:22 PM EST     Sunset
Sun -- 05:47 PM EST     0.94 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.20.30.60.80.90.90.80.70.50.40.30.20.20.30.50.70.90.90.90.80.60.40.3

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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Sun -- 12:03 AM EST     1.23 knots Max Flood
Sun -- 12:52 AM EST     Moonset
Sun -- 02:53 AM EST     -0.00 knots Slack
Sun -- 06:52 AM EST     -1.96 knots Max Ebb
Sun -- 07:17 AM EST     Sunrise
Sun -- 10:16 AM EST     0.00 knots Slack
Sun -- 12:24 PM EST     1.13 knots Max Flood
Sun -- 01:26 PM EST     Moonrise
Sun -- 02:56 PM EST     -0.00 knots Slack
Sun -- 05:20 PM EST     Sunset
Sun -- 07:13 PM EST     -2.16 knots Max Ebb
Sun -- 10:40 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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1.210.5-0.1-0.6-1.2-1.8-2-1.7-1-0.20.61.110.5-0-0.6-1.2-1.8-2.1-2-1.4-0.60.3

Weather Map and Satellite Images
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wmap_A
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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (21,6,7,8)
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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.