Thursday, October18, 2018 L-36.com


Marine Weather and Tides
Riceboro, GA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:31AMSunset 6:51PM Thursday October 18, 2018 10:08 PM EDT (02:08 UTC) Moonrise 2:42PMMoonset 12:45AM Illumination 71% Phase: Waxing Gibbous; Moon at 9 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- 939 Pm Edt Thu Oct 18 2018
.small craft advisory in effect until 11 pm edt this evening...
Overnight..NE winds 15 to 20 kt . Seas 4 to 6 ft, subsiding to 3 to 5 ft.
Fri..NE winds 10 to 15 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft in the afternoon. A chance of showers.
Fri night..E winds 5 to 10 kt, becoming W after midnight. Seas 3 ft. A chance of showers, mainly in the evening.
Sat..W winds 5 to 10 kt. Seas 3 ft. A slight chance of showers in the morning, then a chance of showers in the afternoon.
Sat night..W winds 10 to 15 kt, becoming nw 20 to 25 kt after midnight. Seas 3 to 4 ft. A chance of showers, mainly in the evening.
Sun..N winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 4 to 5 ft.
Sun night..NE winds 15 to 20 kt. Seas 4 to 5 ft.
Mon..NE winds 15 kt. Seas 3 to 4 ft.
Mon night..E winds 10 to 15 kt. Seas 3 ft. A slight chance of showers.
Tue..NE winds 10 kt. Seas 3 ft. A slight chance of showers.
Tue night..NE winds 10 kt. Seas 3 ft. A slight chance of showers.
AMZ300 939 Pm Edt Thu Oct 18 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Cool high pressure will build over the region into Friday before shifting offshore Saturday. A cold front will move through the area Saturday night, followed by high pressure through the middle of next week.


7 Day Forecast for Marine Location Near Riceboro, GA
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location: 31.54, -81.26     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 190136
afdchs
area forecast discussion
national weather service charleston sc
936 pm edt Thu oct 18 2018

Synopsis
Cool high pressure will build over the region into Friday
before shifting offshore Saturday. A cold front will move
through the area Saturday night, followed by high pressure
through the middle of next week.

Near term until 6 am Friday morning
No major changes were made for the late evening update.

A cool, high pressure wedge will remain in place tonight. A
weak coastal through will try and develop offshore closer to
daybreak, but no direct impacts are expected. There is an
outside shot for a few showers to make a run for the middle
georgia coast after midnight, but latest high resolution
guidance supports a mainly dry night over land. The blanket of
stratocumulus that is in place along the georgia coast and
extending inland by a few counties is expected to gradually
breakup later this evening with the loss of insolation only to
reform closer to daybreak as subtle isentropic assent develops
atop the inland wedge, mainly along the 395-305k surfaces.

Despite a weakening of the pressure gradient overnight, light
winds coupled with varying degrees of cloud cover will limit the
radiational cooling potential somewhat. Latest guidance has come
in a bit warmer than previous runs, so opted to nudge overnight
lows up a degree or two for most areas. Still expect a cool,
fall night with lows ranging from the lower 50s across northern
parts of dorchester and berkeley counties away from the santee-
cooper lakes to around 70 along the georgia beaches where
onshore winds will moderate temperatures.

Short term 6 am Friday morning through Sunday
Friday: the mid-levels will consist of high pressure off the
southeast coast of fl in the morning. As time progresses the high
will weaken and move southward while broad troughing develops from
the great lakes region throughout the day as a trough move over the
great lakes region. At the surface, high pressure will be off the
east coast. The high is forecasted to move out to sea as time
progresses. Models hint at some showers along the immediate coast
during the day and this is where we have the highest pops. During
the evening and overnight, pops should trend downward, but showers
could linger far offshore. High temperatures will be near normal
while low temperatures will be several degrees above normal.

Saturday: the mid-levels will consist of high pressure centered off
the southeast coast of fl in the morning and a trough stretching
across the great lakes region. As time progresses the trough will
become more amplified, causing the high to weaken and move further
southward. At the surface, weak troughing will be just off our coast
in the morning while a cold front approaches from the northwest. The
front is forecasted to move through the area during the overnight
hours. Moisture is forecasted to increase ahead of the front. But
models keep trending drier. We trended this way with pops, generally
keeping them in the chance range during the afternoon. But it's
possible they are still overdone as total QPF may only be a
hundredth or two. Any precipitation that moves through will quickly
dissipate behind the front late at night. High temperatures will be
well above normal ahead of the front. Temperatures will drop behind
the front, with the coolest temperatures not arriving until around
daybreak.

Sunday: the mid-levels will consist of a trough along the east
coast. The trough is forecasted to move offshore and deamplify with
time. At the surface, a cold front will be quickly moving offshore
in the morning while high pressure builds from the central u.S. Much
drier air will move into the area, setting the stage for a mostly
sunny day. A cool airmass and northeast winds will keep temperatures
well below normal.

Long term Sunday night through Thursday
Mostly dry conditions and moderating temperatures are expected
heading into early next week as surface high pressure builds in
behind the cold front. The GFS and ECMWF indicate development of a
coastal trough as high pressure pushes offshore Monday night into
Tuesday, and slight chance pops remain for southeastern-most
zones. Forecast uncertainty increases after Tuesday with
possible pressure falls near the south-central plains.

Aviation 02z Friday through Tuesday
Vfr. Low risk for marginal MVFR CIGS just before daybreak,
mainly at ksav.

Extended aviation outlook:VFR Friday. A cold front could bring
brief flight restrictions Saturday into Saturday night.VFR Sunday
through Tuesday.

Marine
Tonight: will cancel the small craft advisory for the edisto to
savannah leg has seas have dropped below 6 ft. Seas were still
at 6.2 ft at 41008 per latest observation. Might have to extend
the georgia nearshore leg another 1-2 hours if this continues.

Will not extend at this time and revisit within the hour. The
advisory remains for the georgia offshore waters.

Friday through Tuesday: high pressure centered off the east
coast will move further out to sea on Friday. A small craft
advisory for the offshore ga waters (amz374) will initially be
in effect Friday morning due to seas around 6 ft. As the seas
subside into Friday afternoon, the advisory will be allowed to
expire. Winds will gradually transition to the west by Friday
night as the high moves further away. Saturday a cold front will
approach from the west, allowing winds to start trending
upwards. The front will move through Saturday night. Winds will
quickly rise behind the front and seas will respond by building.

Wind gusts could reach near gale. Small craft advisories will
be needed for all of the waters Saturday night. By Sunday
afternoon the pressure gradient will decrease as the front moves
away from our area and high pressure builds from the west. This
will allow winds and seas to start trending downward. NE flow
will generally persist early next week.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until noon edt Friday for amz374.

Small craft advisory until 11 pm edt this evening for amz354.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAXG1 - Sapelo Island Reserve, GA 9 mi68 min NE 8.9 73°F 1025 hPa (+0.0)64°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 23 mi78 min ENE 19 G 25 76°F 81°F6 ft1024.8 hPa (+0.8)67°F
FPKG1 - 8670870 - Fort Pulaski, GA 39 mi38 min NE 13 G 16 70°F 78°F1027.1 hPa

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Brunswick / Glynco, GA22 mi73 minNE 10 G 1510.00 miOvercast72°F62°F73%1025.7 hPa

Wind History from BQK (wind in knots)
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Last 24hrCalmCalmCalmN3N3CalmCalmN3N3N4N4N6NE9
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1 day agoS4S5S4S5S5SW7SW5SW5SW6SW5SW5SW9W7SW4SW5SW4NW6NW5NW3CalmSE4SE4CalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3SW7SW6SW4W3W4SE4SE7SE8SE8CalmSE4SE6

Tide / Current Tables for Dog Hammock, Sapelo River, Georgia
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Dog Hammock
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Thu -- 01:45 AM EDT     Moonset
Thu -- 04:11 AM EDT     6.60 feet High Tide
Thu -- 07:30 AM EDT     Sunrise
Thu -- 10:11 AM EDT     1.60 feet Low Tide
Thu -- 03:41 PM EDT     Moonrise
Thu -- 04:45 PM EDT     7.17 feet High Tide
Thu -- 06:49 PM EDT     Sunset
Thu -- 11:02 PM EDT     1.43 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.63.85.16.16.66.35.44.232.11.61.82.63.756.277.26.65.64.32.91.91.4

Tide / Current Tables for Pine Harbor, Sapelo River, Georgia
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Pine Harbor
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Thu -- 01:46 AM EDT     Moonset
Thu -- 04:41 AM EDT     6.67 feet High Tide
Thu -- 07:30 AM EDT     Sunrise
Thu -- 10:53 AM EDT     1.85 feet Low Tide
Thu -- 03:42 PM EDT     Moonrise
Thu -- 05:15 PM EDT     7.24 feet High Tide
Thu -- 06:49 PM EDT     Sunset
Thu -- 11:44 PM EDT     1.65 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.33.24.55.76.56.66.15.13.92.92.11.82.23.14.45.66.77.27.16.35.23.92.71.9

Weather Map and Satellite Images
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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 (22,6,7,8)
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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.