Saturday, June23, 2018 L-36.com


Marine Weather and Tides
Henderson, 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 6:18AMSunset 8:36PM Saturday June 23, 2018 4:23 AM EDT (08:23 UTC) Moonrise 3:36PMMoonset 2:20AM Illumination 75% Phase: Waxing Gibbous; Moon at 10 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- 329 Am Edt Sat Jun 23 2018
Today..SW winds 10 to 15 kt with gusts to 20 kt late. Seas 2 to 3 ft.
Tonight..SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft.
Sun..W winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas 2 ft.
Sun night..SW winds 10 to 15 kt. Seas 2 to 3 ft.
Mon..SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas 2 ft. A chance of showers and tstms.
Mon night..S winds 10 to 15 kt, becoming sw 5 to 10 kt after midnight. Seas 3 ft, subsiding to 2 ft after midnight. A chance of showers. A chance of tstms, mainly in the evening.
Tue..SE winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Tue night..E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.
Wed..E winds 5 to 10 kt. Seas 3 ft. A chance of showers and tstms.
Wed night..SE winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 329 Am Edt Sat Jun 23 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Unusually hot temperatures will continue through Monday as high pressure generally prevails. A cold front will move south into the area Monday night and likely linger nearby through mid week bringing at least a short period of slightly cooler temperatures.

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 230819
afdchs
area forecast discussion
national weather service charleston sc
419 am edt Sat jun 23 2018

Synopsis
Unusually hot temperatures will continue through Monday as high
pressure generally prevails. A cold front will move south into
the area Monday night and likely linger nearby through mid week
bringing at least a short period of slightly cooler temperatures.

Near term through tonight
Pre-dawn: pockets of convection have mainly ran inland and
northwest of our forecast area overnight, a few showers
brushed our most northwest zones earlier on. Dry weather
and only a few clouds through dawn, temps in the mid to upper
70s overall.

Today: the pattern remains fairly persistent over our region
as subtropical high pressure extends from the southwest atlantic
to the lower gulf coast while mid level troughing begins to flatten
out to our north as the mid level cut-off low opens and lifts out
toward new england. The hot weather will persist with an offshore
boundary layer flow and plenty of insolation allowing temps to
warm back well into the 90s this afternoon as the sea breeze
remains pinned along coastal ga during much of the late afternoon
hours with a slow progression along the central sc coast. We have
issued another heat advisory for the eastern half of the forecast
area this afternoon since forecast soundings tend to mix the lower
levels out less efficiently than the past couple of days. We expect
heat indices in the 105-108 degree range for at least a couple hours
mid afternoon.

Convection: the overall pattern continues to suggest the warm
temps aloft combined with lack of broad scale low level moisture
convergence will keep mainly diurnal convection to a minimum
through tonight. This afternoon, the mid levels appear to be
most unstable over southeast ga while deep layered wind fields
are expected to only slowly diminish with time. There is some
indication from several cams that convection may make a late day
run somewhere down the savannah river or points south. Otherwise,
only isolated tstms at best are anticipated along the sea breeze.

We will be watching for any potential late day development of
small multicell convective clusters across the region as fairly
substantial dcapes could present a favorable environment for
cool pools and downburst strength. There is not enough agreement
on high resolution output and 00z model consensus to alter only
slight chance pops at this point.

Tonight: the NAM appeared to have some convective feedback and
we followed gfs ECMWF guidance and persistence to keep it
mainly dry overall. We did opt to carry some slight chance pops
ahead of a weak short wave across our north and northwest zones.

Temps will be warm again, similar to past mornings.

Short term Sunday through Tuesday
The area will remain under the influence of atlantic high pressure
centered offshore and an inland trough of low pressure through
Monday before a cold front is expected to push southward into the
area Monday night. The front will likely stall out over or near the
area through Tuesday while some upper shortwave energy rides
southeast on the east side of the mid-level ridge. This pattern will
mean very warm temperatures will remain in place through Monday
before a break in the heat comes for Tuesday, likely near record
levels (especially lows). Some inland spots could near the century
mark (100 degrees) Sunday and Monday. Moderate to occasionally high
levels of humidity, especially near the coast after the passage of
the sea breeze, should yield heat indices peaking above heat
advisory criteria (105 degrees) Sunday and Monday, possibly even
nearing excessive heat warning criteria (115 degrees). Rain chances
will be very low Sunday, then a bit higher Monday and especially
Tuesday. Some of the storms could become pretty strong given the
high dcape values (1000+ j kg) seen on model forecast soundings.

Long term Tuesday night through Friday
The latest medium range model guidance suggests the stalled cold
front will linger through mid week before dissipating as an offshore
high pressure inland trough pattern sets up. Temperatures will
likely remain at or above normal through the period, especially
later in the week. Rain chances should generally be near normal
through the period.

Aviation 08z Saturday through Wednesday
Vfr conditions will prevail through 06z Sunday. Chances for
thunderstorms this afternoon remain too low to include in the
tafs at this point.

Extended aviation outlook: generallyVFR through Monday except for
mainly afternoon showers thunderstorms. Better chance for
restrictions Monday night into Tuesday as a cold front moves
through.

Marine
The familiar pattern of late persists through tonight with high
pressure offshore and south to southwest synoptic flow peaking
in the mid afternoon to early evening hours along the coast and
during the evening hours over near shore waters. The flow will
likely be just a tad stronger today with 15-20 kt flow likely
during surge times and seas remaining in the 2-3 ft range overall.

Sunday through Thursday: high pressure will persist to the east
through Monday while a pronounced surface trough lingers inland. The
resulting pressure gradient will maintain considerable southwest
flow over the waters. A robust afternoon sea breeze is expected each
day through Monday, with winds near the charleston county coast
occasionally gusting near 15-20 kt. Winds should shift out of the
northeast east behind a cold front Monday night into Tuesday.

Advisory conditions are not anticipated through the period.

Chs watches warnings advisories
Ga... Heat advisory from noon today to 7 pm edt this evening for
gaz101-116>119-137>141.

Sc... Heat advisory from noon today to 7 pm edt this evening for
scz043>045-047>052.

Marine... None.

Near term...

short term... Rjb
long term... Rjb
aviation... Rjb
marine... Rjb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 17 mi60 min SW 5.1 G 7 81°F 82°F1012.4 hPa
SAXG1 - Sapelo Island Reserve, GA 42 mi84 min SSW 8 79°F 1012 hPa (-1.0)75°F
41033 46 mi76 min SW 12 G 18 82°F 81°F1011.5 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 47 mi94 min SSW 14 G 16 84°F 83°F2 ft1012.1 hPa (-0.9)

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 mi28 minSW 710.00 miFair78°F73°F85%1011.4 hPa
Savannah-Hilton Head International Airport, GA8 mi31 minSSW 710.00 miFair78°F73°F87%1012 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA21 mi88 minN 010.00 miFair77°F72°F87%1011.8 hPa

Wind History from SVN (wind in knots)
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Last 24hrSW5W4W6W7W7W7W6SW6SW8W9
G15
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1 day agoSW3CalmCalmW4W5W5W7W7NW9NW5NW6W10
G16
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2 days agoCalmCalmW4CalmCalmCalmSW3CalmS6SE6SE9W13
G22
E4S3CalmS6SW5N5W3SW3CalmSW3CalmCalm

Tide / Current Tables for Highway bridge, Ogeechee River, Georgia
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Highway bridge
Click for Map
Sat -- 03:20 AM EDT     Moonset
Sat -- 03:42 AM EDT     0.06 feet Low Tide
Sat -- 06:20 AM EDT     Sunrise
Sat -- 08:16 AM EDT     1.01 feet High Tide
Sat -- 03:52 PM EDT     -0.01 feet Low Tide
Sat -- 04:35 PM EDT     Moonrise
Sat -- 08:34 PM EDT     Sunset
Sat -- 09:02 PM EDT     1.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.20.10.10.20.60.8110.90.70.60.40.20-00.10.40.811.11.11

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
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Sat -- 12:10 AM EDT     0.01 knots Slack
Sat -- 02:46 AM EDT     1.91 knots Max Flood
Sat -- 03:18 AM EDT     Moonset
Sat -- 06:12 AM EDT     -0.00 knots Slack
Sat -- 06:18 AM EDT     Sunrise
Sat -- 09:48 AM EDT     -2.02 knots Max Ebb
Sat -- 12:18 PM EDT     0.00 knots Slack
Sat -- 03:09 PM EDT     2.14 knots Max Flood
Sat -- 04:34 PM EDT     Moonrise
Sat -- 06:54 PM EDT     -0.00 knots Slack
Sat -- 08:32 PM EDT     Sunset
Sat -- 10:31 PM EDT     -2.39 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.211.81.91.71.20.2-0.8-1.5-1.9-2-1.5-0.40.91.82.121.71-0.1-1.1-1.8-2.3-2.3

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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (4,6,7,8)
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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.