Thursday, June20, 2019 L-36.com


Marine Weather and Tides
Henderson, GA

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Sunrise 6:17AMSunset 8:35PM Thursday June 20, 2019 12:55 AM EDT (04:55 UTC) Moonrise 10:23PMMoonset 8:10AM Illumination 93% Phase: Waning Gibbous; Moon at 17 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- 1221 Am Edt Thu Jun 20 2019
.small craft advisory in effect until 8 am edt this morning...
Tonight..SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 5 ft.
Thu..SW winds 15 to 20 kt. Seas 3 to 4 ft. A slight chance of showers and tstms in the afternoon.
Thu night..SW winds 15 to 20 kt. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. A slight chance of showers and tstms.
Fri..W winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 ft in the afternoon. A slight chance of showers and tstms.
Fri night..SW winds 10 to 15 kt. Seas 2 ft. A slight chance of showers and tstms in the evening.
Sat..SW winds 5 to 10 kt. Seas 2 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 kt. Seas 2 ft. A chance of showers and tstms, mainly in the evening.
Sun..W winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Sun night..SW winds 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms.
Mon..SW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Mon night..SW winds 10 kt. Seas 2 ft. A slight chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 1221 Am Edt Thu Jun 20 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A trough of low pressure will generally prevail into early 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 200433
afdchs
area forecast discussion
national weather service charleston sc
1233 am edt Thu jun 20 2019

Synopsis
A trough of low pressure will generally prevail into early next
week.

Near term until 6 am this morning
Expect dry conditions to prevail for the overnight period. Mostly
clear to partly cloudy skies will give way to some stratus south
of i-16 prior to daybreak as it moves north of the altamaha
river. Lows will range from the mid 70s inland to around 80 at
the beaches and downtown charleston. A tight low level gradient
will result in light breezes to persist for much of the overnight,
even inland zones.

Short term 6 am this morning through Saturday
A warm and humid airmass will be in place Thursday ahead of a
potent upper shortwave moving into southern sc in the afternoon.

850 mb winds will be 35-40 kt by late in the afternoon and 0-6
km shear will be around 30 kt. A slightly more westerly
component to the low-level wind vector will translate to a
slightly later sea breeze development. This should allow more
time for airmass destabilization, providing 2000-2500 j kg cape
and LI values of -6 to -7c. Morning convection may be limited
due to a modest cap and the pinned sea breeze. Activity should
quickly increase during the mid to late afternoon as the
shortwave energy likely spurs somewhat organized convection
upstream that then pushes into our area. We should also
eventually see at least isolated activity developing along the
sea breeze. Severe thunderstorms with damaging winds and perhaps
some hail will be possible, mainly across southern sc and far
eastern ga north of i-16. The greatest risk will be mid
afternoon through early evening coincident with the greatest
instability and timing of the shortwave energy.

A pronounced shortwave ridge will build over the southeast
united states Friday and Friday night, suppressing any
convective potential to far southern ga. High temps pushing into
the mid 90s with dewpoints in the mid 70s far south could result
in a few hours of 105+f heat indices.

Saturday will also be quite warm due to the continuing influence
of the upper ridge, though there will be a better chance for
convection due to a shortwave dropping through in the afternoon.

We cannot rule out a few severe thunderstorms on Saturday given
fairly strong instability ahead of the shortwave. Heat indices
could top 105f in spots as well.

Long term Saturday night through Wednesday
Temperatures will remain above normal through the middle of next
week, and a surface trough of low pressure will persist over the
area. Aloft through early week, the region will remain between an
upper ridge centered to the southwest and a trough to the northeast.

A stronger ridge, more likely through early week, could limit
coverage of diurnal thunderstorms and could prompt heat advisories
for some areas. If the ridge is weaker, coverage of diurnal
convection could increase, and any organized upstream convection
could spill into the area from the northwest. After initial
disagreement through early week, guidance generally agrees that the
upper ridge will weaken retreat west through midweek,
supporting normal to above normal daily pops.

Aviation 06z Thursday through Monday
Vfr for much of the period. Likely to see some status work
north of the altamaha river by daybreak, possibly impacting
ksav. We will maintain tempo for MVFR CIGS nearing daybreak.

Risk for tstms will increase at both kchs and ksav late this
afternoon and evening. Timing and coverage are uncertain enough
to preclude any mentions just yet.

Extended aviation outlook: the main concern will be brief flight
restrictions in showers tstms, mainly during the afternoon and
evening this weekend.

Marine
Overnight: surging was fairly impressive and we hoisted a sca
for near shore ga waters through 12z to account for expected
frequent 25 kt gusts beyond 10-15 miles offshore. Otherwise,
few changes with SCA for all waters except the chs harbor for
the remainder of the night. Seas 3-5 ft, highest offshore.

Thursday through Monday: the gradient will remain relatively
tight through Thursday night due to a persistent trough inland
with high pressure offshore. Mainly due to the potential for 25
kt gusts, we continued the small craft advisory for the
charleston nearshore waters through Thursday evening and the ga
offshore waters through Thursday night. A weak front will drape
across the area from the northwest Friday and linger through the
weekend, resulting in relatively weak wind fields over the
waters.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 8 am edt this morning for amz352-
354.

Small craft advisory until 6 am edt Friday for amz374.

Small craft advisory until midnight edt tonight for amz350.

Near term...

short term...

long term...

aviation...

marine...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 17 mi62 min SW 8.9 G 14 80°F 83°F1011.5 hPa
SAXG1 - Sapelo Island Reserve, GA 42 mi56 min SW 15 79°F 1012 hPa (-0.0)75°F
41033 46 mi48 min WSW 19 G 25 81°F 82°F1010.5 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 47 mi66 min SW 21 G 25 80°F 82°F4 ft1011.3 hPa (+0.0)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 mi60 minSSW 910.00 miFair78°F73°F87%1010.7 hPa
Savannah-Hilton Head International Airport, GA8 mi63 minSSW 1010.00 miFair78°F73°F87%1011.2 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA21 mi60 minSSW 510.00 miFair78°F72°F85%1010.8 hPa

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1 day agoSE3CalmS3CalmCalmCalmCalmCalmE7E3CalmS3N3CalmSE5SE5SE10SE7
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2 days agoS3CalmCalmCalmCalmCalmS4CalmSW6SW8SW7S7SW7SE12SE9S12S10SE13
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--S8S6SE4SE3

Tide / Current Tables for Highway bridge, Ogeechee River, Georgia
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Highway bridge
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Thu -- 01:55 AM EDT     1.12 feet High Tide
Thu -- 06:19 AM EDT     Sunrise
Thu -- 09:10 AM EDT     Moonset
Thu -- 09:32 AM EDT     0.03 feet Low Tide
Thu -- 02:12 PM EDT     0.94 feet High Tide
Thu -- 08:33 PM EDT     Sunset
Thu -- 09:27 PM EDT     0.07 feet Low Tide
Thu -- 11:23 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.811.11.110.80.60.40.200.10.30.60.80.90.90.80.70.50.30.20.10.10.3

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
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Thu -- 12:06 AM EDT     -0.00 knots Slack
Thu -- 03:42 AM EDT     -2.10 knots Max Ebb
Thu -- 06:15 AM EDT     0.01 knots Slack
Thu -- 06:17 AM EDT     Sunrise
Thu -- 08:35 AM EDT     1.77 knots Max Flood
Thu -- 09:08 AM EDT     Moonset
Thu -- 12:14 PM EDT     -0.00 knots Slack
Thu -- 03:35 PM EDT     -1.58 knots Max Ebb
Thu -- 06:14 PM EDT     0.00 knots Slack
Thu -- 08:32 PM EDT     Sunset
Thu -- 08:49 PM EDT     1.88 knots Max Flood
Thu -- 11:21 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.1-0.9-1.6-2-2.1-1.5-0.30.91.71.71.40.90.2-0.7-1.3-1.6-1.6-1.2-0.30.91.71.91.61.2

Weather Map and Satellite Images
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wmap_A
GOES Local Image of    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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Wind Forecast for Charleston, SC (0,6,7,8)
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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.