Wednesday, May24, 2017 L-36.com


Marine Weather and Tides
Port Wentworth, GA

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:19AMSunset 8:22PM Wednesday May 24, 2017 11:11 PM EDT (03:11 UTC) Moonrise 4:36AMMoonset 6:10PM Illumination 0% Phase: New Moon; Moon at 29 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- 915 Pm Edt Wed May 24 2017
.small craft advisory in effect through Thursday evening...
Tonight..SW winds 20 to 25 kt. Seas 4 to 6 ft. Showers and Thunderstorms likely...mainly this evening.
Thu..W winds 15 to 20 kt...increasing to 20 to 25 kt in the afternoon. Seas 4 to 6 ft...subsiding to 4 to 5 ft in the afternoon.
Thu night..W winds 15 to 20 kt...diminishing to 10 to 15 kt after midnight. Seas 3 to 4 ft...subsiding to 2 to 3 ft after midnight.
Fri..W winds 10 to 15 kt. Seas 2 to 3 ft.
Fri night..SW winds 10 to 15 kt. Seas 2 ft.
Sat..SW winds 10 to 15 kt. Seas 2 ft.
Sat night..SW winds 10 to 15 kt. Seas 2 to 3 ft.
Sun..SW winds 10 to 15 kt. Seas 3 to 4 ft.
Sun night..SW winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers and Thunderstorms.
Mon..SW winds 10 kt. Seas 2 to 3 ft. A chance of showers and Thunderstorms.
Mon night..SW winds 10 kt. Seas 2 ft. A chance of showers and Thunderstorms. Mariners are reminded that winds and seas can be higher in and near tstms.
AMZ300 915 Pm Edt Wed May 24 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A cold front will push over the atlantic by early Thursday morning. Large high pressure will build over the region through Thursday and will linger through this weekend. A weak cold front is expected to slowly slide over the region on Tuesday.

7 Day Forecast for Marine Location Near Port Wentworth, GA
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location: 32.17, -81.13     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 250147
afdchs
area forecast discussion
national weather service charleston sc
947 pm edt Wed may 24 2017

Synopsis
A cold front will push over the atlantic by early Thursday
morning. Large high pressure will build over the region through
Thursday and will linger through this weekend. A weak cold front
is expected to slow slide over the region on Tuesday.

Near term through Thursday
On the evening update, we adjusted pops in many areas to reflect
ongoing radar trends with minor adjustments to winds and sky
cover.

The cold front has recently moved through macon ga and was
approaching east central ga. Ahead of the front, clusters of
convective rains remained low-topped and have tended to diminish
as they approach the coast where the air mass was more stable.

The final batch of showers and tstms right along the front has
had a bit of a flare-up recently as it moves into a region of
increased mucapes, however latest hrrr and rap13 high resolution
progs show this instability will wane before moving into our
inland zones prior to midnight. Isolated to scattered showers
and a few tstms will persist for the next few hours, ending
from west to east overnight as the cold front moves through.

Since the deep layered environment still has 40-50 kt of bulk
shear, the risk of severe weather is non-zero, but extremely
low given the lack of significant instability. Skies will also
clear from west to east later tonight and with the passage of
the front, slightly cooler temps and drier air will be moving
in.

Thursday, high pressure is forecast to become centered near fl
and will ridge north across the cwa. Wsw winds will see gusts
gradually strengthen shortly after sunrise. Conditions will
feature mostly sunny conditions with near zero pops. High temps
should range in the upper 70s. Breezy to windy conditions are
likely by afternoon with the passage of a strong mid level
vort and deeper mixing. We may need a lake wind advisory if
model trends continue to show higher surface wind gusts.

Short term Thursday night through Saturday
Thursday: the upper level trough axis will cross the forecast
area mid-day as stacked low pressure continues its trek
northeast into the mid-atlantic region. Surface high pressure
will begin to spill back in from the south and gulf of mexico
behind the cold front as weak upper-level ridging slides slowly
east. This should result in primarily dry conditions Thursday,
but a shower or thunderstorm cannot be entirely ruled out. A
tight pressure gradient will exist across the region, leading to
elevated and gusty surface wind speeds. Temperatures look to be
slightly below normal, with highs just under 80 degrees most
locales and low temperatures averaging around 60 inland and
around 65 at the coast.

Friday: surface high pressure will overspread the region under
weak ridging aloft, continuing a period of calm weather with
almost zero probability for precipitation and mostly sunny skies
anticipated. Near-normal temperatures are anticipated with
highs reaching the lower to mid-80s before cooling into the mid
to upper 60s overnight away from the coast.

Saturday: strengthening trough aloft to the west will induce an
area of low pressure at the surface over the central us. The
associated cold front will begin a slow trek southeast towards
the forecast area. High pressure at the surface will persist
locally under a ridge aloft, and another dry day looks highly
probable under this scenario. Temperatures climb back above
normal, aided by subsidence and some compression in advance of
the front. Expect high temperatures to reach the lower 90s away
from the coast and upper 80s at the beaches, with low
temperatures only dropping to around 70.

Long term Saturday night through Wednesday
A ridge over the east coast combined with surface high pressure
will result in mostly dry weather through the remainder of the
weekend. The surface cold front will approach the area through
the first half of the week as the trough aloft slides east,
bringing the potential for another period of unsettled weather
Monday through Wednesday.

Aviation 02z Thursday through Monday
Occasional MVFR CIGS and showers are expected at both terminals
through the evening ahead of a surface cold front. There are
small chances for brief ifr CIGS and vsbys below 3 nm in heavier
showers. Risk for thunder is generally low. Marginal low level
wind shear is possible overnight but most of shear will be speed
shear off the surface inversion. Skies will clear for Thursday
but it will become breezy to windy with west winds in the 20 to
30 mph range at time, especially at kchs.

Extended aviation outlook: expectVFR conditions to prevail
into the weekend.

Marine
Tonight: a cold front is expected to sweep across eastern ga sc
late, pushing over the marine zones early Thursday morning.

Gusty SW winds will continue across the marine zones. Gusts
could reach near gale levels across portions of amz374 and 350
late this evening. Wave heights will continue to build through
this evening, reaching 5-9 feet within 20 nm and possibly
reaching near 10 feet beyond 50 nm. Small craft advisories will
remain in place all waters.

Thursday through Sunday: tight pressure gradient behind the
surface cold front will lead to elevated and gusty SW to wsw
winds and increasing seas. A small craft advisory has been
hoisted for all zones Thursday, with conditions gradually
improving Friday into Saturday under high pressure.

Tides coastal flooding
Evening high tide levels will trend higher each day as we
approach the new moon and perigee this Friday, though we expect
tides to remain just below coastal flood advisory stage. The
current tide is close to 7 ft mllw at high tide this evening.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until midnight edt tonight for amz330.

Small craft advisory until 8 pm edt Thursday for amz352-354.

Small craft advisory until midnight edt Thursday night for
amz350-374.

Near term...

short term... Jmc
long term... Jmc
aviation...

marine...

tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 15 mi42 min WSW 6 G 8.9 71°F 1001.8 hPa
41033 39 mi64 min SW 19 G 27 76°F 78°F1000.1 hPa
ACXS1 - ACE Basin Reserve, SC 45 mi87 min S 1 74°F 1001 hPa70°F
SAXG1 - Sapelo Island Reserve, GA 53 mi72 min SW 15 74°F 1001 hPa (+0.0)70°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Savannah, Savannah International Airport, GA4 mi19 minSSW 810.00 miOvercast70°F64°F82%1001.5 hPa
Hunter U. S. Army Airfield, GA10 mi74 minSW 510.00 miMostly Cloudy68°F67°F100%1000.6 hPa
Hilton Head Island, Hilton Head Airport, SC23 mi17 minSSW 610.00 miFair72°F66°F83%1002 hPa

Wind History from SAV (wind in knots)
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Last 24hrS6S8SW9SW8SW9SW6SW10SW9S7SW8SW10S11S10S10S23
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1 day agoCalmCalmS7SW8S9S7SW7SW7SW5S4SW7SW8SW9SW9SW8SW6S8S6W10SW4S4CalmS9Calm
2 days agoS4S5S5SW5SW4SW5SW5S4SW6S5SW83S5SW5NE11NE7E11--NW4SE4N9NE7N4E3

Tide / Current Tables for Little Back River, Hwy. 17, Back River., Savannah River, South Carolina
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Little Back River
Click for Map
Wed -- 03:13 AM EDT     -0.21 feet Low Tide
Wed -- 05:36 AM EDT     Moonrise
Wed -- 06:21 AM EDT     Sunrise
Wed -- 08:50 AM EDT     7.84 feet High Tide
Wed -- 03:29 PM EDT     -0.84 feet Low Tide
Wed -- 07:09 PM EDT     Moonset
Wed -- 08:21 PM EDT     Sunset
Wed -- 09:14 PM EDT     9.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.22.30.7-0.20.21.94.26.27.57.87.36.14.32.30.5-0.7-0.613.76.48.39.298

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Wed -- 02:29 AM EDT     0.01 knots Slack
Wed -- 05:00 AM EDT     2.20 knots Max Flood
Wed -- 05:35 AM EDT     Moonrise
Wed -- 06:20 AM EDT     Sunrise
Wed -- 08:39 AM EDT     -0.00 knots Slack
Wed -- 11:42 AM EDT     -2.24 knots Max Ebb
Wed -- 02:38 PM EDT     0.00 knots Slack
Wed -- 05:21 PM EDT     2.79 knots Max Flood
Wed -- 07:07 PM EDT     Moonset
Wed -- 08:19 PM EDT     Sunset
Wed -- 09:02 PM EDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.3-1.8-0.70.71.82.21.91.40.7-0.4-1.5-2.1-2.2-1.9-0.90.622.72.621.20.1-1.3-2.2

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Charleston, SC (23,6,7,8)
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Ground Weather Radar Station Charleston, SC
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weather_mapweather_map weather_map

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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.