Sunday, June24, 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 Sunday June 24, 2018 12:21 PM EDT (16:21 UTC) Moonrise 4:32PMMoonset 2:55AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 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- 1211 Pm Edt Sun Jun 24 2018
This afternoon..SW winds 5 to 10 kt, becoming S 10 to 15 kt late. Seas 2 ft.
Tonight..S winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of showers and tstms.
Mon..SW winds 10 to 15 kt. Seas 2 ft. A slight chance of showers and tstms.
Mon night..SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.
Tue..W winds 5 to 10 kt, becoming E 10 to 15 kt in the afternoon. Seas 2 ft. Showers and tstms likely.
Tue night..E winds 10 to 15 kt, becoming se 5 to 10 kt after midnight. Seas 2 ft. Showers and tstms likely in the evening, then a chance of showers with a slight chance of tstms after midnight.
Wed..NE winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Wed night..S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Thu..SE winds 5 kt. Seas 2 ft. A chance of showers and tstms.
Thu night..S winds 5 to 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 1211 Pm Edt Sun Jun 24 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will extend across the region through Monday. A cold front will drop south into the area Monday and linger near or just south of the area through mid-week. Low pressure could develop off the southeast u.s. NExt 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 241453
afdchs
area forecast discussion
national weather service charleston sc
1053 am edt Sun jun 24 2018

Synopsis
High pressure will extend across the region through Monday. A
cold front will drop south into the area Monday and linger near
or just south of the area through mid-week. Low pressure could
develop off the southeast u.S. Next weekend.

Near term through tonight
10:45 am: minor changes were made to the forecast with this
update. Temperatures along the coast are running slightly higher
than what was forecasted in the hourlies and further inland they
are slightly lower. Dew points in general are slightly higher
than what was forecasted in the hourlies. Given the trends, we
raised high temperatures along the coast by about 2 degrees.

Overall, most locations should reach the upper 90s with the 100
degree mark being possible in a few spots. The beaches won't be
much cooler, reaching the 90s. The new forecast keeps us solidly
in heat advisory territory, with most locations having heat
indices in the 105 to 110 degree range. Though, heat indices for
charleston county now appear to top out ~114 degrees in some
spots. Also, adjusted to sky cover from this morning to match
the satellite trends and blended it into this afternoon with the
typical cumulus development.

Rest of today: sunshine and offshore flow in the boundary layer
this morning will pave the way for another hot and humid day
across the region. Dew points won't mix out as well as they have
the past few days, which combined with the high temperatures
will make it feel very humid outside. Even worse, localized brief
heat indices could possibly touch 115 degrees along the sea
breeze corridor. But it's not over a large enough area over a
large enough time period to justify an excessive heat warning.

Convection: forecast soundings continue to show warm mid levels
today with a subsidence inversion between 800 mb and 700 mb. We
maintained forecast persistence with only low end pops this
afternoon, mainly along and inland from the sea breeze corridor.

Just about all the models show weak mid level short wave energy
moving through the carolinas tonight and all show just a slight
cooling and destabilization of the mid layers during the evening
hours. Warm season convective parameters show a significant shift
to a more favorable mid level environment and the cap could certainly
break in a big way this evening since models also indicate steeper
mid level lapse rates in excess of -6.5c, resulting in scattered
tstms which would likely be strong to locally severe given the
untapped air mass available. The problem at this time was model
depictions of convective initiation ranging from very little
(the 00z runs of nam ECMWF gem), to the nssl WRF and GFS which
show significant convective initiation. We raised pops to 30
percent just about all areas this evening to account for these
latest trends. If storms do get going, we think there would be
some localized severe weather with potential for damaging wind
gusts and large hail. Until trends become more clear, we will
opt to leave out of the hazardous weather outlook for now.

Tonight: storms should sag south and diminish after midnight
with only slight chances for any additional convection overnight,
mainly north. No changes to low temps.

Short term Monday through Wednesday
A cold front will approach from the northwest Monday and then move
south into the area Monday night before stalling nearby through the
rest of the period. This will mean a more unsettled period with
decent rain chances is expected Monday night into at least Tuesday.

Some of the storms could be strong late Monday afternoon evening,
mainly across sc, given the high dcape values (1000+ j kg) and steep
low to mid-level lapse rates. Temperatures will remain above normal
Monday ahead of the front, possibly near 100 degrees inland ahead of
the sea breeze, with heat indices peaking into the heat advisory
range near 110 degrees.

Long term Wednesday night through Saturday
The latest medium range model guidance suggests the stalled cold
front will dissipate as an offshore high pressure inland trough
pattern likely sets up. Interestingly the latest GFS and ecmwf
models indicate low pressure will develop off the sc coast mid week
with the ECMWF showing the potential of the system strengthening
late in the week and moving back toward the nc coast late in the
weekend so will need to keep an eye on this potential. Given the
uncertainty this period we generally kept rain chances near to
slightly above normal. Temperatures will likely remain at or above
normal through the period, especially later in the week when heat
advisories will again be possible.

Aviation 15z Sunday through Thursday
12z tafs:VFR is expected to prevail at kchs and ksav. There is
the potential for isolated thunderstorms this afternoon and
again overnight, but the probabilities of direct impacts to the
airports are too low to include mention in the tafs at this time.

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
Today and tonight: an inland surface trough and high pressure
in the atlantic will drive the weather pattern. South to
southwest winds will peak from the mid afternoon through early
evening along the coast due to the sea breeze. Local gusts up to
25 kt are possible along the sc coastline. Winds should ease
along the coastline a few kt overnight, then veer slightly
towards the west around daybreak as the land breeze develops.

Seas will average 2-3 ft, except 3-4 ft across the charleston
waters during the peak winds. There is a slight chance strong
thunderstorms may develop inland this evening and push offshore
tonight, producing hazardous weather to mariners.

Monday through Friday: 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
Monday, with winds near the charleston county coast gusting 15-20 kt
at times. Winds should shift out of the northeast east behind a cold
front Monday night into Tuesday. Advisory conditions are not
anticipated through the period as seas are mainly 3 ft or less.

Chs watches warnings advisories
Ga... Heat advisory until 8 pm edt this evening for gaz087-088-
099>101-114>119-137>141.

Sc... Heat advisory until 8 pm edt this evening for scz040-042>045-
047>052.

Marine... None.

Near term...

short term...

long term... Rjb
aviation...

marine...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 17 mi58 min WNW 8 G 9.9 88°F 82°F1017.7 hPa
SAXG1 - Sapelo Island Reserve, GA 42 mi82 min SW 1.9 87°F 1018 hPa (+1.0)77°F
41033 46 mi74 min SW 7.8 G 9.7 84°F 84°F1017 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 47 mi92 min WSW 7.8 G 9.7 82°F 83°F2 ft1017.5 hPa (+1.1)

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 mi86 minWNW 910.00 miFair91°F75°F62%1016.8 hPa
Savannah-Hilton Head International Airport, GA8 mi29 minW 910.00 miA Few Clouds93°F73°F54%1017 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA21 mi86 minWSW 510.00 miFair89°F75°F65%1017.2 hPa

Wind History from SVN (wind in knots)
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NW5CalmS6SE8S5SW4S7S5S5S4SW3SW3SW4W7W7W6W9W8
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2 days agoNW9NW5NW6W10
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Tide / Current Tables for Highway bridge, Ogeechee River, Georgia
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Highway bridge
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Sun -- 03:55 AM EDT     Moonset
Sun -- 04:35 AM EDT     0.05 feet Low Tide
Sun -- 06:20 AM EDT     Sunrise
Sun -- 09:07 AM EDT     0.99 feet High Tide
Sun -- 04:40 PM EDT     -0.00 feet Low Tide
Sun -- 05:32 PM EDT     Moonrise
Sun -- 08:34 PM EDT     Sunset
Sun -- 09:51 PM EDT     1.13 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.60.40.20.10.10.30.60.9110.90.70.50.30.1000.20.50.81.11.11.1

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Sun -- 01:05 AM EDT     0.00 knots Slack
Sun -- 03:38 AM EDT     1.84 knots Max Flood
Sun -- 03:54 AM EDT     Moonset
Sun -- 06:18 AM EDT     Sunrise
Sun -- 07:05 AM EDT     -0.00 knots Slack
Sun -- 10:42 AM EDT     -1.96 knots Max Ebb
Sun -- 01:08 PM EDT     0.00 knots Slack
Sun -- 03:59 PM EDT     2.09 knots Max Flood
Sun -- 05:30 PM EDT     Moonrise
Sun -- 07:47 PM EDT     -0.00 knots Slack
Sun -- 08:33 PM EDT     Sunset
Sun -- 11:22 PM EDT     -2.37 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.5-0.11.11.71.81.61.10.1-0.9-1.5-1.8-1.9-1.4-0.21.11.92.121.60.9-0.2-1.2-1.9-2.3

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (12,3,4,5)
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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.