Friday, August18, 2017 L-36.com


Marine Weather and Tides
Port Wentworth, GA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 6:50AMSunset 8:05PM Friday August 18, 2017 2:50 AM EDT (06:50 UTC) Moonrise 2:25AMMoonset 4:40PM Illumination 17% Phase: Waning Crescent; Moon at 26 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- 1239 Am Edt Fri Aug 18 2017
Rest of tonight..SW winds 15 kt. Seas 2 to 3 ft.
Fri..SW winds 5 to 10 kt, becoming S 15 kt in the afternoon. Seas 2 ft. A slight chance of tstms. A slight chance of showers.
Fri night..SW winds 15 kt. Seas 2 to 3 ft. A slight chance of showers and tstms in the evening, then a chance of showers and tstms after midnight.
Sat..SW winds 10 to 15 kt. Seas 3 ft. A slight chance of showers and tstms in the morning, then a chance of showers and tstms in the afternoon.
Sat night..SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Sun..S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Sun night..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms, mainly in the evening.
Mon..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Mon night..S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Tue..S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Tue night..S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 1239 Am Edt Fri Aug 18 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Atlantic high pressure will remain in control as troughing persists inland through late this week. A cold front will dissipate as it approaches the area this weekend. High pressure will return early next week. Another cold front will approach during the middle of next week.

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 180520
afdchs
area forecast discussion
national weather service charleston sc
120 am edt Fri aug 18 2017

Synopsis
Atlantic high pressure will remain in control as troughing
persists inland through late this week. A cold front will
dissipate as it approaches the area this weekend. High pressure
will return early next week. Another cold front will approach
during the middle of next week.

Near term until 6 am this morning
Although there could still be a stray shower in a couple of
spots, convection is over with for the rest of the night. It'll
remain very warm and humid, with many places not even falling
below 80f on the barrier islands, and no better than mid or
upper 70s elsewhere. Record high minimum temperatures are likely
to be challenged early Friday morning. For most of us skies will
stay mostly clear, but very weak isentropic ascent and low
level convergence will cause patchy stratocumulus over parts of
the coastal corridor.

Short term 6 am this morning through Sunday
The area will remain sandwiched between a ridge over the
northern gulf and a ridge over the western atlantic on Friday. A
weak upper trough will remain to our west though the greatest
shortwave energy will remain west of the area. Isolated to
scattered mainly afternoon convection is expected, focused along
the sea breeze. Highs will top out in the middle 90s though
dewpoints are expected to partially mix out during the afternoon
so heat indices are currently forecast in the 105-109f range.

Saturday the upper trough shifts slightly east, allowing some
shortwave energy to move into the area during the afternoon.

Ample instability will exist for scattered showers and tstms
late morning through early evening. Greater cloud coverage will
shave a degree or two off afternoon high temps as well as bump
maximum heat indices down a bit. Nevertheless, it will continue
to be quite hot and humid.

Sunday looks fairly similar to Saturday though the upper ridge
will gradually rebuild. Scattered daytime convection is
anticipated though coverage may be a bit lower than Saturday.

Highs again in the middle 90s.

Long term Sunday night through Thursday
Abnormally strong mid level ridging will prevail Monday and Tuesday
before a broad long wave trough develops over a good portion of
the eastern states during the middle of the week. Simultaneously
at the surface the sub-tropical ridge will persist as a lee
side trough redevelops for Monday and Tuesday, but with
diminishing heights aloft and the formation of the large scale
trough, a cold front will attempt to approach late in the
forecast period. Plenty of moisture and modest thermodynamics
will support at least scattered coverage of showers and t-storms
through the period. Temps will remain above august norms. There
are currently no strong indications that shower tstorm coverage
on Monday will be any greater than a typical summer day due to
the building upper ridge and fact that the approaching cold
front will dissipate before it approaches.

Aviation 06z Friday through Tuesday
Vfr through 06z Saturday, with very little coverage of shra tsra
Friday afternoon.

Extended aviation outlook: shower tstms possible each afternoon.

Marine
The low level ridge axis remains well off to the south and
southeast of the waters through tonight and a typical warm
season regime of south to southwest synoptic flow will persist
over the waters. Overnight surges should not amount to more
than 13-18 kt on average with seas still in the 2 to 3 ft range
overall.

Winds over the coastal waters will be stronger Friday through
Saturday, especially across the nearshore waters due to a
tighter gradient along the western periphery of the atlantic
high. The afternoon sea breeze could see winds gusting to 20 kt
along the sc coast. Seas will briefly build to as high as 4 ft
over the waters.

Sunday through Tuesday we expect winds seas to decrease in
response to expanding atlantic high pressure.

Tides coastal flooding
Astronomical influences will lead to a round of elevated tides
this weekend into early next week. Only small tidal departures
are necessary and we could approach shallow coastal flooding
levels, especially over parts of the sc coast, including
downtown charleston.

Climate
Record high minimums for 17 august...

kchs 78 2010 <--- low 80, record preliminarily broken.

Kcxm 82 2010
ksav 78 1995 <--- low 78, record preliminarily tied.

Record high minimums for 18 august...

kchs 78 2010
kcxm 82 1998
ksav 78 2010
record high minimums for 19 august...

kchs 79 2010
kcxm 81 2009
ksav 79 1878

Equipment
The temperature sensor at the downtown charleston observation site
(kcxm) has failed. Technicians are working to resolve the problem.

Temperature and dewpoint data will not be available until the sensor
is replaced.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term...

short term...

long term...

aviation...

marine...

tides coastal flooding...

climate...

equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 15 mi50 min SW 6 G 8.9 83°F 86°F1015.5 hPa (-1.0)
41033 39 mi42 min SW 14 G 18 85°F 1014.3 hPa
ACXS1 - ACE Basin Reserve, SC 45 mi65 min Calm 82°F 1015 hPa79°F
SAXG1 - Sapelo Island Reserve, GA 53 mi50 min SSW 8 82°F 1016 hPa (-1.0)78°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Savannah-Hilton Head International Airport, GA4 mi57 minS 510.00 miFair80°F75°F87%1015.4 hPa
Hunter U. S. Army Airfield, GA10 mi1.7 hrsSSW 310.00 miFair81°F75°F84%1015.1 hPa
Hilton Head Island, Hilton Head Airport, SC23 mi55 minSW 610.00 miFair82°F78°F89%1015.6 hPa

Wind History from SAV (wind in knots)
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Last 24hrSW3SW3CalmSW3CalmCalmW53W65NW5SW13
G17
SW6W8W6S7S11S10S8SW6SW5SW6S5S5
1 day agoSW5W4W5W5W4W8W5W4NW64W7SW6SW6SW6NW6W6W4W3SE5S5SW6SW6SW4W5
2 days agoCalmSW3SW5SW4SW4W5W9W7NW7NW6W11W9W8W6W11W10W7SW5SW5W4W4SW5SW7SW6

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
Fri -- 01:15 AM EDT     0.57 feet Low Tide
Fri -- 03:25 AM EDT     Moonrise
Fri -- 06:49 AM EDT     7.58 feet High Tide
Fri -- 06:50 AM EDT     Sunrise
Fri -- 01:29 PM EDT     -0.30 feet Low Tide
Fri -- 05:39 PM EDT     Moonset
Fri -- 07:23 PM EDT     8.86 feet High Tide
Fri -- 08:04 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.50.60.92.44.46.27.37.67.164.32.61-0.1-0.11.43.76.188.88.77.96.54.7

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Fri -- 12:47 AM EDT     0.00 knots Slack
Fri -- 03:11 AM EDT     1.63 knots Max Flood
Fri -- 03:24 AM EDT     Moonrise
Fri -- 06:50 AM EDT     Sunrise
Fri -- 06:51 AM EDT     -0.00 knots Slack
Fri -- 10:23 AM EDT     -1.97 knots Max Ebb
Fri -- 12:51 PM EDT     0.01 knots Slack
Fri -- 03:34 PM EDT     2.37 knots Max Flood
Fri -- 05:38 PM EDT     Moonset
Fri -- 07:28 PM EDT     -0.00 knots Slack
Fri -- 08:03 PM EDT     Sunset
Fri -- 11:03 PM EDT     -2.28 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-10.31.21.61.51.20.7-0.2-1.1-1.7-1.9-1.9-1.10.21.52.32.321.50.6-0.6-1.5-2-2.3

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 (2,6,7,8)
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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.