Tuesday, September17, 2019 L-36.com


Marine Weather and Tides
Tybee Island, GA

Version 3.4
NOTICE
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:07AMSunset 7:29PM Tuesday September 17, 2019 4:37 PM EDT (20:37 UTC) Moonrise 8:40PMMoonset 9:02AM Illumination 86% Phase: Waning Gibbous; Moon at 18 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- 329 Pm Edt Tue Sep 17 2019
.small craft advisory in effect from 2 am edt Wednesday through Friday evening...
Tonight..NE winds 10 to 15 kt. Seas 4 to 5 ft, building to 4 to 6 ft after midnight. A slight chance of showers after midnight.
Wed..NE winds 15 kt with gusts to 20 kt. Seas 4 to 6 ft. A slight chance of showers in the morning.
Wed night..NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft.
Thu..NE winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft. A slight chance of showers.
Thu night..NE winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft. A slight chance of showers.
Fri..NE winds 15 to 20 kt. Seas 4 to 6 ft. A slight chance of showers.
Fri night..E winds 10 to 15 kt with gusts to 20 kt. Seas 4 to 6 ft, subsiding to 4 to 5 ft after midnight. A slight chance of showers.
Sat..E winds 10 kt. Seas 3 to 4 ft.
Sat night..E winds 5 to 10 kt. Seas 2 to 3 ft.
Sun..E winds 5 to 10 kt. Seas 2 ft.
Sun night..S winds 5 to 10 kt. Seas 2 ft.
AMZ300 329 Pm Edt Tue Sep 17 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Hurricane humberto will continue to move away from the coast through mid week. A cold front will advance through the area Wednesday, 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 171956
afdchs
area forecast discussion
national weather service charleston sc
356 pm edt Tue sep 17 2019

Synopsis
Hurricane humberto will continue to move away from the coast
through mid week. A cold front will advance through the area
Wednesday, followed by high pressure into early next week.

Near term until 6 am Wednesday morning
A cold front will move south and should make it toward the
altamaha river near daybreak as hurricane humberto well
offshore continues to move farther away. Some showers are
expected to develop as moisture, instability and convergence
increase a bit. Can't rule out some weak storms but any thunder
should mainly be confined to around the ga coast where the
greatest instability is expected. Temperatures should fall to
around 70 north and west toward the pee dee midlands with lower
to mid 70s south and east toward the coast and ga coastal
empire.

Short term 6 am Wednesday morning through Friday
Wednesday: models in good agreement that the backdoor front will
move through the area from north to south during the day. Models
show some increase in moisture associated with the front and this is
supported by cloud cover across virginia at the present time. Some
minor instability is expected to develop mainly in the afternoon
across southeast georgia. Threat for precipitation is low enough in
the north due to the early arrival of the front that it was left out
of the forecast. Highest rain chances will be in the south. Threat
for precipitation will end by late afternoon. Made some minor
adjustment to lower high temperatures from the allendale walterboro
areas south to near savannah. Maintained highs in the mid to upper
80s southwest of this area, but have some concern that cloud cover
may be sufficient enough to keep the high temperatures from getting
that high. Highs will mainly be in the lower 80s in the north and
along southeast south carolina coast. Drier air will move in behind
the front with lows Wednesday night ranging from near 60 in the
north to near 70 along the southeast georgia coast.

Thursday: drier air will continue to overspread the area in the wake
of the cold front. The only exception will be along the southeast
georgia coast near the altamaha river where a few very light marine
showers could brush the coast. Brisk northeast winds are expected
along the coast. High temperatures area wide will be rather mild
and this combined dew point temperatures in the 50s inland to the
lower to mid 60s at the coast will make for a rather pleasant day.

Highs should range from the upper 70s near the south santee river to
the mid 80s across far inland portions of southeast georgia. A few
light marine showers are possible in southeast georgia mainly east
of i-95 Thursday night.

Friday: as surface high pressure begins to build from the mid-
atlantic states into the western atlantic, surface winds will become
more onshore especially from beaufort county south and this will
allow the threat for some light marine showers to spread further
inland especially across southeast georgia. Highs should range from
near 80 along the coast to the mid 80s far inland where more
sunshine is expected and there is basically no threat for
precipitation.

Long term Friday night through Tuesday
Deep layered ridging will persist over the weekend and then
tend to break down during the first part of next week. Models
continue to show dry weather prevailing through the entire
period. High temps are expected to warm slightly above climo
during the period, however overnight temps should continue to
fall into the 60s each night away from the ocean as the
atmosphere remains quite dry.

Aviation 20z Tuesday through Sunday
Vfr conditions are expected to prevail at kchs and ksav through 18z
Wednesday. A cold front will move through the terminals late
tonight early tomorrow and will bring isolated showers to the
area. Chances are too low to mention in the forecast at this
time. There is a low chance for MVFR CIGS late tonight,
especially at ksav.

Extended aviation outlook:VFR conditions will prevail.

Marine
Tonight: a cold front will move south through most, if not all,
of the waters with winds picking up from the northeast behind
it. Seas will also build as a result and small craft advisories
are in effect for all waters except charleston harbor and the
nearshore ga waters.

Wednesday through Sunday: northeast winds will dominate
throughout the week in the wake of the backdoor cold front that
moves through the waters on Wednesday. The combination of
increasing seas and winds will result in small craft advisory
conditions for all coastal waters into Friday evening for the
nearshore waters and well into Saturday night for the offshore
georgia waters. Looks like the best threat for small craft
advisory conditions to occur in charleston harbor will be on
Thursday. Later shifts will need to further evaluate and if
necessary issue an advisory there.

Rip currents: moderate risk at all beaches today due mainly to
earlier rip current reports and continued elevated long period swell
emanating from hurricane humberto. There will be a moderate risk of
rip currents on Wednesday due to lingering elevated long period
swells and increasing longshore currents due to strengthening
northeast winds.

The rip current risk will remain elevated through the end of the
week as northeast winds and strong longshore currents continue.

Tides coastal flooding
Low chances for minor coastal flooding around the times of high
tide through late week, especially along the south carolina
coast.

Climate
Daily record high temperatures for Tuesday, 9 17.

Charleston international airport (kchs)
96... 1972
savannah hilton head international airport (ksav)
97... 1972, 1933, 1896
downtown charleston (kcxm)
94... 1896

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory from 2 am Wednesday to 8 pm edt Friday
for amz352.

Small craft advisory until 4 am edt Sunday for amz374.

Small craft advisory until 8 pm edt Friday for amz350.

Small craft advisory from 11 am Wednesday to 8 pm edt Friday
for amz354.

Near term... Rjb
short term... Mte
long term...

aviation... Mte rad
marine... Mte rjb
tides coastal flooding...

climate...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 3 mi55 min ESE 7 G 8.9 87°F 83°F1013.9 hPa
41033 29 mi29 min ESE 12 G 16 84°F 86°F1014.6 hPa
ACXS1 - ACE Basin Reserve, SC 42 mi112 min NNE 1.9 93°F 1014 hPa67°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 44 mi47 min NE 5.8 G 7.8 83°F 84°F4 ft1013.6 hPa (-0.9)73°F
SAXG1 - Sapelo Island Reserve, GA 48 mi97 min E 5.1 91°F 1014 hPa (-1.0)73°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 mi47 minE 510.00 miFair88°F71°F59%1013.9 hPa
Hunter U. S. Army Airfield, GA16 mi41 minSE 710.00 miFair94°F67°F42%1012.4 hPa
Savannah-Hilton Head International Airport, GA20 mi44 minVar 610.00 miA Few Clouds97°F64°F35%1012.8 hPa

Link to 5 minute data for KHXD

Wind History from HXD (wind in knots)
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Last 24hrNE13E4
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SE3CalmCalmCalmCalmCalmCalm3CalmCalmCalmN5CalmCalmN6N6NW6NW6NW8NW7NW5E5
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Tide / Current Tables for Tybee Light, Savannah River, Georgia
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Tybee Light
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Tue -- 04:31 AM EDT     0.59 feet Low Tide
Tue -- 07:08 AM EDT     Sunrise
Tue -- 10:02 AM EDT     Moonset
Tue -- 10:27 AM EDT     7.34 feet High Tide
Tue -- 04:48 PM EDT     0.96 feet Low Tide
Tue -- 07:26 PM EDT     Sunset
Tue -- 09:39 PM EDT     Moonrise
Tue -- 10:48 PM EDT     6.93 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.14.83.21.70.70.71.73.45.26.67.37.26.55.33.82.41.311.73.14.766.76.9

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Tue -- 02:31 AM EDT     -1.74 knots Max Ebb
Tue -- 05:46 AM EDT     0.00 knots Slack
Tue -- 07:08 AM EDT     Sunrise
Tue -- 08:20 AM EDT     2.11 knots Max Flood
Tue -- 10:02 AM EDT     Moonset
Tue -- 11:50 AM EDT     -0.00 knots Slack
Tue -- 02:39 PM EDT     -1.85 knots Max Ebb
Tue -- 06:11 PM EDT     0.00 knots Slack
Tue -- 07:26 PM EDT     Sunset
Tue -- 08:41 PM EDT     1.81 knots Max Flood
Tue -- 09:39 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-1.2-1.7-1.7-1.5-0.80.31.42.121.30.6-0.1-1.1-1.7-1.8-1.6-1.1-0.20.91.61.81.40.8

Weather Map
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GEOS 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 (16,3,4,5)
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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.