Friday, August23, 2019 L-36.com


Marine Weather and Tides
Henderson, GA

Version 3.4
NOTICE
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 6:53AMSunset 8:01PM Friday August 23, 2019 3:37 PM EDT (19:37 UTC) Moonrise 11:55PMMoonset 1:03PM Illumination 43% Phase: Third Quarter Moon; Moon at 23 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- 135 Pm Edt Fri Aug 23 2019
This afternoon..SE winds 5 to 10 kt. Seas 2 ft.
Tonight..S winds 5 to 10 kt. Seas 2 ft.
Sat..SE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms in the afternoon.
Sat night..E winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Sun..NE winds 5 to 10 kt. Seas 2 ft, building to 3 ft in the afternoon. Showers likely with a chance of tstms.
Sun night..NE winds 10 kt. Seas 2 to 3 ft. A chance of showers. A chance of tstms, mainly in the evening.
Mon..NE winds 5 to 10 kt. Seas 2 ft. Showers and tstms likely.
Mon night..SE winds 5 to 10 kt. Seas 2 ft. A chance of showers with a slight chance of tstms.
Tue..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Tue night..SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 135 Pm Edt Fri Aug 23 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Atlantic high pressure will prevail today, before a cold front approaches from the north tonight. The front will cross through the area on Saturday then will stall offshore Sunday. Low pressure could develop along the front and track northeast and offshore through the first half of next week. Another cold front could impact the region late next week.


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 231745
afdchs
area forecast discussion
national weather service charleston sc
145 pm edt Fri aug 23 2019

Synopsis
Atlantic high pressure will prevail today, before a cold front
approaches from the north tonight. The front will cross through
the area on Saturday then will stall offshore Sunday. Low
pressure could develop along the front and track northeast and
offshore through the first half of next week. Another cold
front could impact the region late next week.

Near term through tonight
Rest of today: radar shows convection developing across our
inland zones. This is in areas near where mlcapes are ~2,000
j kg with dcapes ~800 j kg. Hence, a few marginally severe pulse
storms with damaging wind gusts cannot be ruled out, mainly far
inland. Closer to the coast, the sea breeze moving inland
should make convection more isolated. Cams have the convection
peaking in the upcoming hours, then decreasing in
intensity coverage around sunset. We made minor changes to the
pop weather grids to reflect this. Otherwise, mid-level ridging
will gradually dissipate along and just off the southeast coast
while the overall synoptic pattern remains persistent across the
region.

Tonight: deeper moisture ahead of a cold front will be sagging
into sc overnight. We maintained some slight chance overnight
pops to account for some nocturnal convection north of the
savannah river. Otherwise, it should be mainly dry in ga.

Models suggest some patchy inland fog is possible well inland
but confidence to include in the forecast was poor at this time.

Short term Saturday through Monday
A fairly unsettled period on tap as a cold front impacts the area.

The front is progged to drop south into the forecast area on
Saturday, then become stationary to the south and east through early
next week. A wave of low pressure could then develop along the
stalled front and lift northeast parallel to the coast. Regardless
of potential development of tropical characteristics, models at this
point are in consensus that this low will stay well offshore.

Given the deep moisture and forcing in play, rain chances will be
higher than normal, particularly Saturday into Sunday. Periods of
heavy rain are expected and some localized ponding flooding in poor
drainage areas will be possible especially with weak storm motions.

The time of greatest concern appears to be Saturday afternoon into
Saturday night. Otherwise, the severe weather threat appears low but
could not rule out a couple stronger storms with the front. On
Monday, there will be a decent gradient in pops with highest rain
chances across southeast georgia zones in proximity to enhanced
convergence and better moisture.

Seasonable temperatures on Saturday will drop a few degrees below
normal Sunday and Monday behind the front.

Long term Monday night through Friday
Models are in good agreement that low pressure will be lifting
northeast away from the area Monday night into Tuesday. Another cold
front could impact the region later in the period. There are some
discrepancies in regards to convective coverage but with elevated
moisture and shortwave energy, it looks to stay a bit unsettled.

Temperatures are expected to be near normal.

Aviation 18z Friday through Wednesday
18z tafs:VFR will prevail. Convection should remain inland of
the TAF sites this afternoon evening, so there is no mention in
the tafs.

Extended aviation outlook: periodic flight restrictions expected in
showers thunderstorms at kchs ksav through early next week.

Marine
Through tonight: persistence forecast once again with S to sw
flow below 15 kt and seas 1 to 3 ft, highest well offshore.

Saturday through Wednesday: a cold front will approach from the
north on Saturday and stall in the vicinity through early next week.

An area of low pressure is progged to develop on the front then lift
northeast along it. This set-up will result in a predominantly
northeast flow Sunday into Monday. Conditions at this point look to
remain below small craft advisory criteria, however should the
pressure gradient tighten a bit more between inland high pressure
and the offshore low, wind speeds could come close. No marine
concerns are expected thereafter.

Rip currents: increasing east northeast winds could contribute to an
enhanced risk of rip currents on area beaches late this weekend into
early next week, especially if offshore low pressure develops and
intensifies.

Tides coastal flooding
Astronomical tides will be running close to minor coastal flood
advisory levels next week and onshore winds could lead to even
higher tides, mainly during the evening high tide cycles starting
Monday. In addition, there is the potential for some heavy rain
around the times of high tide which could exacerbate any flooding
issues.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term...

short term... Etm
long term... Etm
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 17 mi55 min S 7 G 11 87°F 85°F1016.9 hPa
SAXG1 - Sapelo Island Reserve, GA 42 mi97 min ESE 7 90°F 1017 hPa (-1.0)75°F
41033 46 mi29 min S 7.8 G 12 84°F 87°F1016.2 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 47 mi47 min SE 3.9 G 5.8 84°F 86°F2 ft1016.2 hPa (-1.8)76°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 mi1.7 hrsSSE 710.00 miA Few Clouds91°F74°F58%1015.8 hPa
Savannah-Hilton Head International Airport, GA8 mi1.7 hrsESE 810.00 miPartly Cloudy93°F75°F56%1016.2 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA21 mi1.7 hrsSSE 510.00 miFair92°F73°F54%1015.8 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hrSE11NE11
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E3SE8SE6S5S4S7S4S4S3S3W3W3W3CalmCalmS5S4SW5E3W4SE7S9
1 day agoSE11S10S5S4S6S5S6S4S6S3S3W3CalmCalmSW3W3CalmSW4SW7SW7SW6SE4SE8SE10
2 days agoSE9SE7SE10S8SE6SE6S4S6S5S4CalmCalmCalmCalmCalmCalmCalmSW5W5SW6SW6CalmS8SE8

Tide / Current Tables for Highway bridge, Ogeechee River, Georgia
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Highway bridge
Click for Map
Fri -- 12:01 AM EDT     0.20 feet Low Tide
Fri -- 12:15 AM EDT     Moonrise
Fri -- 05:05 AM EDT     0.94 feet High Tide
Fri -- 06:54 AM EDT     Sunrise
Fri -- 10:58 AM EDT     Last Quarter
Fri -- 12:24 PM EDT     0.12 feet Low Tide
Fri -- 02:03 PM EDT     Moonset
Fri -- 05:36 PM EDT     1.06 feet High Tide
Fri -- 08:00 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.30.50.70.90.90.90.80.70.50.30.20.10.10.30.60.911.110.80.70.50.4

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Fri -- 12:13 AM EDT     Moonrise
Fri -- 03:08 AM EDT     -0.00 knots Slack
Fri -- 05:47 AM EDT     -1.46 knots Max Ebb
Fri -- 06:52 AM EDT     Sunrise
Fri -- 09:14 AM EDT     0.00 knots Slack
Fri -- 10:58 AM EDT     Last Quarter
Fri -- 12:02 PM EDT     1.83 knots Max Flood
Fri -- 02:01 PM EDT     Moonset
Fri -- 03:38 PM EDT     -0.00 knots Slack
Fri -- 06:16 PM EDT     -1.60 knots Max Ebb
Fri -- 07:58 PM EDT     Sunset
Fri -- 10:05 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.410.50.1-0.6-1.3-1.5-1.2-0.8-0.20.71.51.81.610.4-0.3-1.1-1.6-1.5-1.2-0.8-0.10.7

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 (15,3,4,5)
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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.