Monday, December10, 2018 L-36.com


Marine Weather and Tides
Dutch Island, 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 7:12AMSunset 5:21PM Monday December 10, 2018 3:23 AM EST (08:23 UTC) Moonrise 9:53AMMoonset 8:23PM Illumination 8% 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- 113 Am Est Mon Dec 10 2018
Rest of tonight..NW winds 10 to 15 kt. Seas 3 to 4 ft. Patchy drizzle.
Mon..NW winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Mon night..NW winds 15 kt. Seas 3 to 4 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, subsiding to 2 ft after midnight.
Wed..W winds 5 to 10 kt. Seas 2 ft.
Wed night..SE winds 5 kt, becoming ne after midnight. Seas 2 ft.
Thu..E winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers.
Thu night..SE winds 10 to 15 kt. Seas 3 to 4 ft. 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 5 to 7 ft. A chance of showers. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 113 Am Est Mon Dec 10 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A low pressure trough over or near the area will keep things a bit unsettled through Monday night, before high pressure builds from the west and persists with dry weather into Thursday. Another storm system will then affect the area late this week.


7 Day Forecast for Marine Location Near Dutch Island, GA
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location: 31.98, -81.01     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 100619
afdchs
area forecast discussion
national weather service charleston sc
119 am est Mon dec 10 2018

Synopsis
A low pressure trough over or near the area will keep things a
bit unsettled through Monday night, before high pressure builds
from the west and persists with dry weather into Thursday.

Another storm system will then affect the area late this week.

Near term until 6 am this morning
Early this morning: no changes to the forecast through sunrise.

Will continue to see patchy drizzle and perhaps even a light
shower or two late. Widespread clouds will help keep
temperatures steady through the night with a cold north to
northwest wind.

Short term 6 am this morning through Wednesday
A colder than normal air mass will remain in place through the
period as a deep upper trough slowly moves east across the
region through Tuesday before some slight upper ridging returns
Wednesday. The main concern, albeit slight, is the potential for
some very light wintry precipitation Monday night as
forcing moisture associated with the upper trough jet peak. The
12z NAM gfs ECMWF indicate the potential for some very light
snow and or sleet after midnight Monday night across far
northern and western portions of our forecast area closer to the
pee dee midlands. For now we have introduced some light wintry
precipitation to the forecast mainly north of i-26 i-526. Either
way, surface temperatures could drop to freezing well inland
Tuesday morning and this could lead to some black ice. However,
this seems unlikely at this time given the limited precipitation
expected and low probability of sub-freezing temperatures. By
Wednesday morning much more of the area away from the coast
should see freezing temperatures but roadways should be dry
enough to prevent any black ice.

Long term Wednesday night through Sunday
A powerful closed upper low is expected to approach the area
Friday, pushing a cold front through the area along with
numerous showers and perhaps some tstorms over the waters.

Increasing southerly flow ahead of the front will yield above
normal temperatures Thursday through Friday. There are model
differences regarding the speed of the storm system and whether
precipitation might linger into Saturday before drier high
pressure builds in.

Aviation 06z Monday through Friday
Ifr ceilings have returned to both sites and are expected to
persist through sunrise. There could still be patchy drizzle
impacting the terminals reducing visibilities for a brief time.

Didn't explicitly mention this in the taf's though. Regarding
ceilings into the day, thinking is that an improvement to MVFR
will take place at both sites eventually. Timed this improvement
into ksav at 16z and at 19z at kchs. Ceilings should then lower
back to ifr in the evening once again.

Extended aviation outlook:VFR conditions will return on
Tuesday. Then MVFR or lower conditions could return again late
Thursday Friday.

Marine
Tonight: conditions will continue to improve across the coastal
waters in the wake of the departing winter storm. Have
cancelled the small craft advisory for charleston harbor.

Advisories remain in effect for the georgia offshore leg through
the night and the charleston county waters until 1 am Monday.

Monday through Friday: expect elevated winds to persist through
Tuesday night before conditions improve with incoming high
pressure Wednesday. Conditions then likely to go back downhill
late Thursday Thursday night as another storm system affects the
area, likely reaching small craft advisory levels again for
most if not all of the waters as early as Thursday night but
more likely Friday.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 7 am est Wednesday for amz374.

Near term... Bsh
short term... Rjb
long term... Jrl
aviation... Bsh rjb
marine... Rjb st


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 7 mi42 min NNW 8.9 G 11 40°F 53°F1014.6 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 41 mi34 min WNW 14 G 18 44°F 60°F3 ft1014.2 hPa (+0.4)41°F
SAXG1 - Sapelo Island Reserve, GA 42 mi84 min NW 8.9 42°F 1014 hPa (+0.0)40°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, GA8 mi88 minWNW 510.00 miLight Rain40°F36°F87%1013.9 hPa
Savannah-Hilton Head International Airport, GA15 mi31 minNW 86.00 miFog/Mist39°F37°F96%1015 hPa
Hilton Head Island, Hilton Head Airport, SC23 mi29 minSSW 57.00 miOvercast39°F37°F93%1014.6 hPa

Wind History from SVN (wind in knots)
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Last 24hrE10E18
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NW4NW6NW5N5CalmN5N7--NW5N4NW4W4--W5W6
1 day agoN3N3NE4NE4NE4NE5NE7NE9NE10
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2 days agoCalmCalmCalmCalmNW3CalmCalmE3----CalmN4CalmCalmE3CalmCalmCalmCalmCalmCalmCalmCalmNE3

Tide / Current Tables for Savannah Sheraton Resort Hotel, Wilmington River, Georgia
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Savannah Sheraton Resort Hotel
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Mon -- 03:41 AM EST     0.26 feet Low Tide
Mon -- 07:13 AM EST     Sunrise
Mon -- 09:52 AM EST     Moonrise
Mon -- 10:03 AM EST     8.35 feet High Tide
Mon -- 04:22 PM EST     0.44 feet Low Tide
Mon -- 05:19 PM EST     Sunset
Mon -- 08:23 PM EST     Moonset
Mon -- 10:17 PM EST     7.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.23.51.80.50.31.22.94.96.77.98.386.95.23.31.60.50.71.83.55.26.57.27

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Mon -- 02:06 AM EST     -1.59 knots Max Ebb
Mon -- 04:45 AM EST     0.00 knots Slack
Mon -- 07:13 AM EST     Sunrise
Mon -- 07:20 AM EST     1.94 knots Max Flood
Mon -- 09:52 AM EST     Moonrise
Mon -- 11:16 AM EST     -0.00 knots Slack
Mon -- 02:54 PM EST     -1.96 knots Max Ebb
Mon -- 05:19 PM EST     Sunset
Mon -- 05:29 PM EST     0.01 knots Slack
Mon -- 07:48 PM EST     1.76 knots Max Flood
Mon -- 08:23 PM EST     Moonset
Mon -- 11:26 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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-1.1-1.5-1.6-1.5-0.80.31.41.91.81.510.3-0.7-1.5-1.8-2-1.6-0.60.61.51.71.410.4

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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Wind Forecast for Charleston, SC (3,6,7,8)
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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.