Wednesday, January23, 2019 L-36.com


Marine Weather and Tides
Wilmington 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 7:20AMSunset 5:50PM Wednesday January 23, 2019 4:36 AM EST (09:36 UTC) Moonrise 8:54PMMoonset 9:24AM Illumination 94% Phase: Waning Gibbous; Moon at 17 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- 314 Am Est Wed Jan 23 2019
.small craft advisory in effect from this evening through Thursday afternoon...
Today..E winds 10 to 15 kt, becoming S 15 kt. Seas 4 to 5 ft. A chance of showers.
Tonight..S winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 4 to 6 ft, building to 5 to 7 ft after midnight. Showers with a slight chance of tstms after midnight.
Thu..SW winds 20 to 25 kt with gusts to 30 kt, becoming W 15 to 20 kt in the afternoon. Seas 5 to 7 ft, subsiding to 4 to 6 ft in the afternoon. Showers, mainly in the morning.
Thu night..NW winds 15 to 20 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight.
Fri..NW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the afternoon.
Fri night..NW winds 10 to 15 kt. Seas 2 ft.
Sat..N winds 5 to 10 kt. Seas 2 ft.
Sat night..N winds 5 to 10 kt. Seas 2 ft.
Sun..N winds 5 to 10 kt. Seas 2 ft.
Sun night..N winds 5 to 10 kt. Seas 2 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 314 Am Est Wed Jan 23 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A warm front will lift north today. A cold front will advance through the area Thursday, followed by high pressure through early next week. Another cold front will move through next Tuesday.


7 Day Forecast for Marine Location Near Wilmington Island, GA
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Area Discussion for - Charleston, SC
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Fxus62 kchs 230908
afdchs
area forecast discussion
national weather service charleston sc
408 am est Wed jan 23 2019

Synopsis
A warm front will lift north today. A cold front will advance
through the area Thursday, followed by high pressure through
early next week. Another cold front will move through next
Tuesday.

Near term through tonight
Pre-dawn: clouds have been fairly widespread overnight with
much milder temps hanging in the 40s at most locations. Isentropic
ascent atop the coastal trough resulting in mainly isolated
light showers since midnight, this trend to continue through
daybreak.

Today: steady low level warm air advection atop a shallow low
level inversion this morning will anchor plenty of clouds
across the area. Inland wedging is forecast to erode later this
morning into this afternoon, as a warm front pushes north
across the carolinas. Rainfall potential today does not look
widespread or significant based on rather elevated 850-500 mb
condensation pressure deficits. This suggests the return flow
moisture today will be fairly shallow and we maintained just
chance pops mainly in the 30 percent range this morning,
trending pops mostly over sc zones later in the day with dry
weather for much of SE ga after early this afternoon. The
weather will become much warmer by mid to late afternoon, even
well inland. High temps in the mid upper 60s far north to the
lower 70s southern ga. Southerly winds will tend to increase
during the afternoon as a low level jet strengthens ahead of an
advancing upper trough to the west.

Tonight: mainly dry conditions should prevail for much of the
early evening hours. Winds will continue to increase with
turbulent low level mixing resulting in steady to slowly
rising temps across the region. Tonight's low temps could
certainly occur at many locations not long after sunset before
the stronger winds kick in. A progressive and vigorous upper
wave will sweep into the lower gulf coast region and reach north
ga by dawn on Thursday. Significant upper dynamics and pwats
exceeding 1.5 inches will accompany a strong cold front into the
region late tonight. Mostly shallow convective rains and
perhaps a narrow strongly-forced line of heavier rains will
move into the forecast area after midnight, nearing the coast
toward daybreak. We will begin to see breezy to windy conditions
develop as a 55-65 kt low level jet sweeps atop the region. It
would not be surprising to see wind speeds nearing wind advisory
levels along some of the coastal zones for a period later
tonight. Mid level instability is quite weak and very little
cape progged at the boundary layer suggest any thunder or deeper
convection will be quite limited. Rains are expected to be at
least briefly heavy at times late tonight with amounts ranging
from 1 2 inch to over an inch in some areas.

Short term Thursday through Saturday
The cold front will be pushing off the coast Thursday morning,
taking with it the widespread rain showers. Cold advection will
quickly begin following the front, causing temps to fall through
the morning hours. Increasing sunshine and downslope flow
developing by early afternoon should offset the cold advection
and cause temps to level off. The daytime high temperature may
well occur around sunrise at many sites. Although low-level wind
speeds will decrease quickly during the day, cold advection will
support deeper mixing, thus breezy conditions expected.

Cool and dry high pressure will build over the area Friday
through Saturday, resulting in clear skies, highs in the low mid
50s and lows in the upper 20s to lower 30s.

Long term Saturday night through Tuesday
Dry weather and moderating temperatures expected Saturday night
through Tuesday as high pressure gradually shifts east. A mostly
dry cold front will sweep through Tuesday night, followed by a
considerable cool down.

Aviation 08z Wednesday through Sunday
Vfr for much of the period, although MVFR CIGS are possible
overnight and at times during the day today. Winds will veer to
a southerly component later today and become quite gusty by
late today and this evening as a strong low level jet builds
into the coastal corridor. Isolated to scattered light showers
possible with a warm front and building moist low level wind
field.

Extended aviation outlook: MVFR ifr ceilings vsbys will clear
out by late Thursday morning, though breezy conditions will
occur through Thursday afternoon.

Marine
Today: a coastal trough will shift inland and allow winds to
veer to the east and southeast over the waters. This progression
will result in winds mainly below 15 kt this morning with an
uptick in speeds later today. Seas will remain elevated with
scas continuing over charleston and outer ga waters.

Tonight: winds will increase as strong low level wind fields
spread over the waters. We have issued scas for the remainder
of the forecast legs including the charleston harbor. Winds
could gust to greater than 30 kt along the land sea interface
and warmer ga waters beyond 20 nm later tonight. There is
some concern for brief gales to develop out closer to the gulf
stream waters after midnight. We decided against a gale watch
as the extent of the warmest waters looks to be relatively
confined to the outer reaches of amz374. We do think that a
period of gales will be more likely if models show even
stronger low level winds on the next run. Seas will build
substantially tonight, especially beyond the pilot buoys.

The southerly low-level jet will be at its peak around 12z
Thursday with NAM depiction of 925 mb winds 60-65 kt. The warm
advection regime will not support strong mixing over the
relatively cool shelf waters, but beyond 15 nm the water is warm
enough to support at least occasional gusts to 34 kt. We held
off on issuing any gale watches warnings due to the short window
of opportunity for gales.

Winds will shift to offshore during the day as the cold front
moves farther offshore. Though low-level winds will decrease
considerably as the day wears on, deeper mixing in cold air
advection will allow gusty winds to persist.

Small craft advisory conditions will continue for all waters
through at least Thursday afternoon, though most waters will
continue to see 6+ ft seas through parts of Thursday night or
into Friday morning.

High pressure will build over the waters late Friday through
early next week, yielding relatively quiet marine weather.

Tides coastal flooding
We have issued a coastal flood advisory for minor salt water
flooding at the mid morning high tide today based on the
latest tidal anomalies and projections.

Chs watches warnings advisories
Ga... Coastal flood advisory from 8 am to 11 am est this morning for
gaz117-119-139-141.

Sc... Coastal flood advisory from 8 am to 11 am est this morning for
scz048>051.

Marine... Small craft advisory from 6 pm this evening to 11 pm est
Thursday for amz352.

Small craft advisory until 6 am est Friday for amz350.

Small craft advisory from 6 pm this evening to 6 pm est
Thursday for amz354.

Small craft advisory until 10 am est Friday for amz374.

Small craft advisory from 6 pm this evening to 4 pm est
Thursday for amz330.

Near term...

short term... Jrl
long term... Jrl
aviation... Jrl
marine... Jrl
tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 6 mi42 min NNE 4.1 G 6 51°F 51°F1028.4 hPa
41033 37 mi28 min NNE 9.7 G 14 52°F 1028.1 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 42 mi46 min SE 12 G 14 62°F 57°F6 ft1027.3 hPa (-1.2)55°F
SAXG1 - Sapelo Island Reserve, GA 43 mi96 min N 5.1 51°F 1028 hPa (-1.0)50°F
ACXS1 - ACE Basin Reserve, SC 48 mi111 min N 1.9 47°F 1030 hPa45°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 mi40 minNE 310.00 miMostly Cloudy50°F45°F86%1027.7 hPa
Savannah-Hilton Head International Airport, GA14 mi43 minENE 710.00 miOvercast49°F46°F90%1028.3 hPa
Hilton Head Island, Hilton Head Airport, SC22 mi41 minVar 510.00 miFair50°F48°F94%1028.8 hPa

Wind History from SVN (wind in knots)
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Tide / Current Tables for Savannah Sheraton Resort Hotel, Wilmington River, Georgia
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Savannah Sheraton Resort Hotel
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Wed -- 03:38 AM EST     -1.94 feet Low Tide
Wed -- 07:22 AM EST     Sunrise
Wed -- 09:23 AM EST     Moonset
Wed -- 09:51 AM EST     9.60 feet High Tide
Wed -- 04:11 PM EST     -1.52 feet Low Tide
Wed -- 05:49 PM EST     Sunset
Wed -- 08:54 PM EST     Moonrise
Wed -- 10:22 PM EST     8.43 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.22.80.2-1.6-1.8-0.42.25.17.69.29.68.87.14.72-0.3-1.5-10.83.35.77.58.48.2

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
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Wed -- 01:38 AM EST     -2.58 knots Max Ebb
Wed -- 04:26 AM EST     0.01 knots Slack
Wed -- 07:09 AM EST     3.00 knots Max Flood
Wed -- 07:21 AM EST     Sunrise
Wed -- 09:22 AM EST     Moonset
Wed -- 10:51 AM EST     -0.01 knots Slack
Wed -- 02:05 PM EST     -2.85 knots Max Ebb
Wed -- 05:03 PM EST     0.00 knots Slack
Wed -- 05:48 PM EST     Sunset
Wed -- 07:36 PM EST     2.54 knots Max Flood
Wed -- 08:54 PM EST     Moonrise
Wed -- 11:18 PM EST     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.9-2.5-2.5-2-0.712.432.82.11.1-0.2-1.6-2.6-2.8-2.6-1.7-0.11.52.42.521.40.4

Weather Map and Satellite Images
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GOES Local Image of Southeast    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 (4,6,7,8)
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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.