Monday, May21, 2018 L-36.com


Marine Weather and Tides
Port Wentworth, GA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 6:21AMSunset 8:20PM Monday May 21, 2018 11:06 AM EDT (15:06 UTC) Moonrise 11:40AMMoonset 12:34AM Illumination 42% Phase: First Quarter Moon; Moon at 7 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- 914 Am Edt Mon May 21 2018
Rest of today..NE winds 5 kt, becoming se 10 kt. Seas 2 to 4 ft. A slight chance of showers late this morning.
Tonight..SE winds 5 to 10 kt. Seas 3 to 4 ft.
Tue..S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms.
Tue night..S winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms.
Wed..S winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms.
Wed night..S winds 5 to 10 kt. Seas 3 ft. A slight chance of showers and tstms.
Thu..S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Thu night..SE winds 5 to 10 kt. Seas 2 ft. A chance of showers with a slight chance of tstms.
Fri..SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Fri night..S winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 914 Am Edt Mon May 21 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. The region will remain between atlantic high pressure and broad low pressure to the west. This pattern should support south winds through most of the week, yielding warm and moist conditions.

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 211346
afdchs
area forecast discussion
national weather service charleston sc
946 am edt Mon may 21 2018

Synopsis
The region will remain between atlantic high pressure and broad
low pressure to the west. This pattern should support south
winds through most of the week, yielding warm and moist
conditions.

Near term until 6 pm this evening
Subtropical ridging from the east will hold form today as weak
shortwave energy meanders along the eastern gulf coast. Modified
forecast soundings are not overly unstable today with a well
defined h7 theta-e minimum centered right over southeast south
carolina and southeast georgia. This will essentially cap off
the atmosphere and the potential for deep convection despite
highs warming into the lower-mid 80s. The various cams are
consistent in developing isolated, low-topped showers ahead of
the sea breeze and with sufficiently deep low-level moisture in
place, this can not be completely discounted. A few coastal
showers could move inland this morning, but activity over the
atlantic should diminish as low-level convergence shifts west
to ahead of the sea breeze. Plan to drop mentionable pops for
the coastal counties and just include 20-30% pops across the
interior. 30% pops along with a mention of a slight chance of
tstms were clustered across the far southwest georgia zones
where guidance shows deeper moisture and weaker mid-level
capping.

Short term 6 pm this evening through Thursday
Tonight: sfc high pressure centered over bermuda will build across
the forecast area tonight. In addition, slight increases in h5
heights are expected as mid level low drifts west across the deep
south. Forecast sounding across the CWA indicate that a significant
subsidence inversion will build around h850. Given little to no sfc
instability and forcing, I will indicate decreasing values of schc
pops overnight. Low temperatures should verify well in the upper 60s
to around 70 degrees.

Tuesday through Thursday: the area will remain between atlantic
high pressure to the east and low pressure to the west. A cold
front will approach from the north Wednesday night before
stalling out just north of the area. This pattern will maintain
the tropical air mass in place and lead to higher than normal
rain chances, especially each afternoon and evening. In general
we think the highest chances will be inland near the better
moisture, instability and forcing. Some spots could pick up over
an inch. No significant flooding or severe weather is
anticipated at this time. Temperatures will generally be near to
above normal, especially lows.

Long term Thursday night through Sunday
High pressure pushing southeast from the ohio valley mid-atlantic
region will combine with atlantic high pressure as surface low
pressure tries to organize slightly in the central gulf of mexico.

The low should move toward the north-central gulf coast and this
will continue to feed tropical moisture into the local area leading
to high rain chances especially each afternoon evening. We continue
to discount the GFS which indicates a secondary low move north along
the southeast u.S. Coast as it remains an outlier. Temperatures
should stay near to above normal.

Aviation 14z Monday through Friday
Vfr conditions expected across kchs and ksav through the 12z
taf period. It is possible that ground fog or few to sct stratus
may develop over ksav through 13z, highlighted with a tempo.

The potential for convection will remain below levels to
mention in the tafs, but isolated showers will develop across
the region this afternoon. Winds are forecast to remain from the
south-southeast between 5-10 kts, between 10-15 kts during the
heat of the afternoon.

Extended aviation outlook: a persistent tropical air mass will lead
to higher than normal rain chances through the period, mainly each
afternoon. Thunder chances will be low however given the limited
instability.

Marine
Today: large high pressure centered over bermuda will gradually
build west over the region through tonight. Southeast winds
will continue through today and tonight, speeds remaining
between 10 kt or less. Wave heights are forecast to range from
2-4 ft within 20 nm to 4-5 ft beyond 20 nm.

Tuesday through Saturday: the area will remain between low pressure
to the west and high pressure to the east. No significant wind
concerns, however seas will be elevated near small craft
advisory levels close to the gulf stream into Tuesday and again
starting Friday night.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 15 mi54 min E 12 G 13 77°F 78°F1022.1 hPa
41033 39 mi58 min ENE 7.8 G 9.7 76°F 76°F1021.8 hPa
ACXS1 - ACE Basin Reserve, SC 45 mi81 min NE 1.9 77°F 1022 hPa73°F
SAXG1 - Sapelo Island Reserve, GA 53 mi66 min ESE 7 81°F 1021 hPa (+2.0)74°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 mi13 minESE 910.00 miMostly Cloudy81°F71°F72%1021.4 hPa
Hunter U. S. Army Airfield, GA10 mi10 minE 810.00 miMostly Cloudy80°F75°F88%1020.9 hPa
Hilton Head Island, Hilton Head Airport, SC23 mi16 minE 38.00 miMostly Cloudy79°F73°F84%1022 hPa

Wind History from SAV (wind in knots)
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Last 24hrS4SW6SW5SE5SW6S9S6W3SW3CalmCalmCalmCalmNE3CalmCalmCalmCalmN6NE5NE5NE5E7SE9
1 day agoCalmCalmNE5SE10
G18
E15E13SE11SE12SE7SE6S5S4S6SW6S6S6S3S3SW3SW4SW6S6S54
2 days agoSE8S5SE6SE7S13SE14S11S10SE10SE6SE3S5SE3S3CalmE4CalmCalmCalmCalmCalmCalm3Calm

Tide / Current Tables for Little Back River, Hwy. 17, Back River., Savannah River, South Carolina
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Little Back River
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Mon -- 01:33 AM EDT     Moonset
Mon -- 03:03 AM EDT     8.38 feet High Tide
Mon -- 06:23 AM EDT     Sunrise
Mon -- 09:41 AM EDT     0.00 feet Low Tide
Mon -- 12:39 PM EDT     Moonrise
Mon -- 03:52 PM EDT     7.53 feet High Tide
Mon -- 08:19 PM EDT     Sunset
Mon -- 10:01 PM EDT     0.19 feet Low Tide
Mon -- 11:50 PM EDT     First Quarter
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.86.788.48.175.33.31.60.30.11.12.84.76.37.37.57.15.842.20.80.20.8

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Mon -- 01:32 AM EDT     Moonset
Mon -- 02:54 AM EDT     -0.00 knots Slack
Mon -- 06:07 AM EDT     -2.29 knots Max Ebb
Mon -- 06:22 AM EDT     Sunrise
Mon -- 09:08 AM EDT     0.01 knots Slack
Mon -- 11:42 AM EDT     1.90 knots Max Flood
Mon -- 12:38 PM EDT     Moonrise
Mon -- 03:27 PM EDT     -0.00 knots Slack
Mon -- 06:44 PM EDT     -2.07 knots Max Ebb
Mon -- 08:17 PM EDT     Sunset
Mon -- 09:27 PM EDT     0.01 knots Slack
Mon -- 11:50 PM EDT     First Quarter
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.21.71-0.1-1.3-2.1-2.3-2.1-1.4-0.211.81.91.61.30.5-0.6-1.5-2-2.1-1.7-0.60.71.8

Weather Map and Satellite Images
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wmap_A
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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (11,2,3,4)
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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.