Monday, May29, 2017 L-36.com


Marine Weather and Tides
Henderson, 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 6:18AMSunset 8:26PM Monday May 29, 2017 1:11 PM EDT (17:11 UTC) Moonrise 9:22AMMoonset 11:21PM Illumination 18% Phase: Waxing Crescent; Moon at 4 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- 1214 Pm Edt Mon May 29 2017
Today..W winds 10 kt...becoming S 15 kt this afternoon. Seas 2 ft.
Tonight..S winds 15 kt...becoming sw 5 to 10 kt after midnight. Seas 2 ft.
Tue..W winds 5 to 10 kt...becoming sw in the afternoon. Seas 2 ft. A slight chance of showers and Thunderstorms in the afternoon.
Tue night..S winds 5 to 10 kt...becoming sw after midnight. Seas 2 ft in the evening...then seas 1 foot. A chance of showers and Thunderstorms...mainly in the evening.
Wed..W winds around 5 kt...becoming E in the afternoon. Seas 1 foot. A slight chance of showers and Thunderstorms.
Wed night..S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and Thunderstorms in the evening...then a chance of showers and Thunderstorms after midnight.
Thu..S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and Thunderstorms.
Thu night..S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and Thunderstorms.
Fri..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and Thunderstorms.
Fri night..S 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 1214 Pm Edt Mon May 29 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will linger over the region today before a weak cold front gradually sags south into the area. Atlantic high pressure will extend west over the region late week into the upcoming weekend.

7 Day Forecast for Marine Location Near Henderson, GA
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location: 32.03, -81.22     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 291656
afdchs
area forecast discussion
national weather service charleston sc
1256 pm edt Mon may 29 2017

Synopsis
High pressure will linger over the region today before a weak
cold front gradually sags south into the area. Atlantic high
pressure will extend west over the region late week into the
upcoming weekend.

Near term through tonight
Early afternoon update: sunny skies prevail over the forecast
area with hot temps lingering into late day. We maintained
highs in the mid 90s. Subsidence aloft keeping the weather dry
and the west winds in the low level were resulting in very few
cumulus, especially through 21z.

Later this afternoon, the cap weakens and shortwave energy
embedded within the west-southwest flow aloft begins to impact
the area. Model consensus is that an area of convection will
develop within the surface trough over central and north georgia
and then push to the east.

Tonight: the big question during this time is what upstream
convection develops and what is it's state as it moves closer to
the forecast area. It appears we will be dependent on convection
moving in for rain chances, as there will not be any real
initiating features across the forecast area. Therefore,
confidence is low in coverage and intensity for the evening and
early overnight hours. Pop's have been limited to the 20-30
percent chance range. The overall near storm environment isn't
overly impressive, especially when considering that any impacts
would likely be after sunset in the absence of surface heating.

Mid-level lapse rates should be between -6 and -7 c with li's of
-5 to -6. Dcape values will likely be in excess of 1000 j kg,
but instability will probably not be rooted in the surface. The
marginal risk in place by SPC seems quite reasonable given that
the overall coverage will be isolated to scattered at best. But,
we could still see a couple of strong to marginally severe
storms capable of damaging wind gusts and hail. The main time
period would be roughly 7-11 pm. Pop's shift to the east and
diminish through the night. Lows are only expected to fall into
the low 70s.

Short term Tuesday through Thursday
Tuesday should be more active than prior days due to increasing
shortwave energy affecting the area and a weak front sagging
southeast into the area. High temps around 90 and dewpoints
close to 70 will contribute to moderate capes of 1500-2000 j kg
in the afternoon. Mid-level lapse rates will be decent and some
dry air will exist aloft, supporting decent cold pools. 0-6 km
shear will be around 25 kt which is marginal but could support
some storm organization. The best severe weather potential looks
to be inland closer to the better upper level energy.

Wednesday will be fairly similar to Tuesday though mid-level
flow will be veering, potentially resulting in more capping that
could limit convective development. Instability parameters are
also expected to be weaker. Isolated to scattered tstms expected
to develop in the afternoon. Severe weather potential looks
relatively low though an isolated severe storm will be possible.

Subtle shortwave ridging may produce some NVA on Thursday and
the surface front may push just southeast of the region.

However, decent low-level moisture and warm temps will produce
at least some surface-based instability. Convection potential is
somewhat nebulous for Thursday though we trended pops downward
a bit.

Long term Thursday night through Sunday
Friday through Sunday may feature higher coverage of showers
and tstms mainly in the afternoon and evening as a series of
shortwaves moves through the southeast and a lee surface trough
exists inland. A more pronounced cold front could affect the
area Sunday or Monday, though the front may not end up making it
this far south.

Aviation 18z Monday through Saturday
Vfr will prevail at both kchs and ksav through 18z Tuesday.

Thunderstorms could develop late this evening and impact the
area, but confidence in direct impacts at either terminals
remain quite low.

Extended aviation outlook: mainlyVFR conditions. Brief flight
restrictions possible in mainly afternoon evening showers tstms.

Marine
Today through tonight: northwest to west flow early on will
shift to south and southwesterly through the day and remain
southwesterly through the overnight. Wind speeds may increase
into the 15 knot range this afternoon, highest along the
land sea interface and in the charleston harbor where winds will
likely be 15-20 knots. Overnight, winds will mainly be in the
10-15 knot range. Seas will generally be in the 2-3 ft range.

Fairly weak winds and small seas are expected to persist over
the atlantic waters and charleston harbor Tuesday through
Saturday. Weak atlantic high pressure will linger off the coast
with a subtle front stalled just inland. The sea breeze will be
fairly weak Tuesday through Thursday, then potentially a bit
stronger Friday into Saturday as the atlantic ridge strengthens.

Equipment
The temperature sensor at ksav is running high during the
daytime hours. Use this data with caution, especially during
peak heating. The high temperature has been set to missing for
today. Technicians have been notified.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term...

short term... Jrl
long term... Jrl
aviation...

marine...

equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 17 mi42 min WNW 6 G 7 84°F 1016.9 hPa
SAXG1 - Sapelo Island Reserve, GA 42 mi72 min Calm 87°F 1017 hPa (+1.0)70°F
41033 46 mi64 min SW 9.7 G 12 80°F 79°F1016.2 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 47 mi82 min SW 5.8 G 5.8 79°F 79°F2 ft1017 hPa (+1.3)72°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, GA4 mi74 minN 010.00 miFair87°F73°F64%1016.2 hPa
Savannah, Savannah International Airport, GA8 mi79 minNW 510.00 miA Few Clouds89°F66°F47%1016.4 hPa
Ft. Stewart, GA21 mi74 minSW 410.00 miFair88°F68°F52%1016.5 hPa

Wind History from SVN (wind in knots)
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Last 24hrSW11W10
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SW5CalmCalmCalmCalmCalmW4W7W5W4CalmCalmW4W5W6W8CalmW5
1 day agoW7W8W9
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W10SW8W5SW5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW5W8W8W12
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2 days agoW6W8W10W5W5W6Calm----CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW6W4W6SW6

Tide / Current Tables for Highway bridge, Ogeechee River, Georgia
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Highway bridge
Click for Map
Mon -- 02:42 AM EDT     1.27 feet High Tide
Mon -- 06:20 AM EDT     Sunrise
Mon -- 10:22 AM EDT     -0.10 feet Low Tide
Mon -- 10:22 AM EDT     Moonrise
Mon -- 03:21 PM EDT     1.06 feet High Tide
Mon -- 08:24 PM EDT     Sunset
Mon -- 10:36 PM EDT     -0.08 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.611.21.31.210.80.50.30-0.1-00.20.60.9110.90.80.60.30.1-0.1-0.1

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Mon -- 12:38 AM EDT     -0.01 knots Slack
Mon -- 03:58 AM EDT     -2.69 knots Max Ebb
Mon -- 06:18 AM EDT     Sunrise
Mon -- 06:52 AM EDT     0.01 knots Slack
Mon -- 09:20 AM EDT     2.24 knots Max Flood
Mon -- 10:20 AM EDT     Moonrise
Mon -- 01:05 PM EDT     -0.01 knots Slack
Mon -- 04:21 PM EDT     -2.40 knots Max Ebb
Mon -- 07:03 PM EDT     0.00 knots Slack
Mon -- 08:22 PM EDT     Sunset
Mon -- 09:44 PM EDT     2.68 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.8-0.5-1.8-2.5-2.7-2.4-1.30.21.62.22.11.71.10.1-1.1-2-2.4-2.3-1.5-0.11.52.52.72.3

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 (13,3,4,5)
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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.