Monday, March25, 2019 L-36.com


Marine Weather and Tides
Richmond Hill, 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 7:21AMSunset 7:40PM Monday March 25, 2019 2:13 AM EDT (06:13 UTC) Moonrise 11:48PMMoonset 9:43AM Illumination 81% Phase: Waning Gibbous; Moon at 19 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- 142 Am Edt Mon Mar 25 2019
Rest of tonight..S winds 5 to 10 kt. Seas 2 ft.
Mon..SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas 2 ft.
Mon night..S winds 10 to 15 kt, becoming sw after midnight. Seas 2 to 3 ft. A slight chance of tstms in the evening. A chance of showers.
Tue..NW winds 10 kt, becoming ne 20 to 25 kt with gusts to 30 kt in the afternoon. Seas 2 ft, building to 3 to 4 ft in the afternoon. A slight chance of showers in the morning, then a chance of showers in the afternoon.
Tue night..NE winds 25 kt with gusts to 35 kt. Seas 5 to 7 ft, building to 6 to 8 ft after midnight. A chance of showers.
Wed..NE winds 20 to 25 kt with gusts to 35 kt. Seas 6 to 8 ft, building to 7 to 9 ft in the afternoon. A chance of showers in the morning.
Wed night..NE winds 20 to 25 kt with gusts to 30 kt. Seas 6 to 8 ft, subsiding to 5 to 7 ft after midnight.
Thu..NE winds 15 to 20 kt. Seas 4 to 6 ft.
Thu night..NE winds 10 to 15 kt. Seas 4 to 6 ft.
Fri..NE winds 10 kt. Seas 4 to 5 ft.
Fri night..E winds 5 to 10 kt. Seas 3 to 4 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 142 Am Edt Mon Mar 25 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will persist through early Monday. Low pressure will cross the region Monday night followed by a strong cold front Tuesday. High pressure will build in from the north during mid week and then persist from late week into Saturday.


7 Day Forecast for Marine Location Near Richmond Hill, GA
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location: 31.95, -81.34     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 250546
afdchs
area forecast discussion
national weather service charleston sc
146 am edt Mon mar 25 2019

Synopsis
High pressure will persist through early Monday. Low pressure
will cross the region Monday night followed by a strong cold
front Tuesday. High pressure will build in from the north during
mid week and then persist from late week into Saturday.

Near term until 6 am this morning
Early this morning: quiet conditions will prevail through
sunrise. High clouds will stream in through the night from the
approaching trough, but the forecast is dry. Could see some
shallow ground fog, but it doesn't look as though it warrants a
mention in the forecast.

Short term 6 am this morning through Wednesday
Monday: high pressure offshore will continue to pump a SW to s
return flow into the forecast area. This should result in even
milder temps with surface dewpoints mostly in the lower to mid
50s. Most of the clouds early will be high level clouds with
moisture advection at 850 mb likely to result in scattered
cumulus fields into early-mid afternoon. Temps are expected to
warm to the mid and upper 70s with a few spots reaching 80
degrees inland. A few spotty showers may develop in the
afternoon along the sc resultant sea breeze but the GFS was an
outlier with it's amount of convective QPF across the chs tri-
county. Late in the day, an approaching upper wave will dig into
the southeast states with showers and isolated tstms developing
upstream. This activity is expected to reach our inland areas
closer to sunset.

Monday night and Tuesday: increasing deeper level moisture and
upper forcing is expected to result in scattered numerous
showers and perhaps a few tstms into our region Monday night.

Isolated to scattered showers may persist on Tuesday, especially
ga zones. Our highest pops in the 60 percent range are
along north of i-16. Overall instability is not impressive and
surface dew points in the 50s suggest our potential for strong
thunder is low, especially since much of convection will occur
after dusk. QPF amounts will also tend to be lower-end less than
1 4 inch.

Low pressure off the carolina coast early Tuesday will move
away, allowing a strong backdoor cold front to drop into the
area from the north. Cooler northeast flow will increase from n
to S across the region Tuesday with temps struggling to get into
the 60s if clouds tend to hang in all day which easily could
happen. Shower chances appear a bit higher across southern ga
where a secondary short wave will swing through late Tuesday and
Tuesday night.

Wednesday: another coastal low will develop offshore of the
florida coast and it appears wet weather will reside off our
coast and down over florida with this synoptic setup. Our region
will see a strong wedge of high pressure extending across ga
and the carolinas. Skies should become partly sunny by the
afternoon with highs only in the lower 60s north to mid 60s
inland south ga. Gusty northeast winds should persist along the
beaches and barrier islands most all day.

Long term Wednesday night through Sunday
Dry high pressure will gradually move offshore, bringing a
return to the warm temperatures. Next weekend looks particularly
warm with highs reaching 80f or higher in many spots. The next
front could approach late in the weekend.

Aviation 06z Monday through Friday
Vfr conditions are expected to prevail at kchs and ksav through
06z Tuesday. Could see some shallow ground fog around sunrise,
but no flight restrictions expected. A cold front and associated
band of showers and isolated thunderstorms will approach the
terminals late this evening. The showers will diminish with time
and there is still low confidence regarding coverage.

Introduced prevailing showers at both sites in the 01-02z time
period.

Extended aviation outlook: flight restrictions possible Monday
night through Tuesday night.

Marine
Tonight: E SE winds to start will turn toward the S SW at 5-15
kt later on as high pressure retreats offshore and low pressure
approaches from the west. Seas of 2-3 feet are expected.

Monday, s-sw flow could become gusty in the chs harbor during
the afternoon with gusts to 20 kt. The main marine concern with
a strong backdoor cold front moving south through the waters
with significant northeast surging and building seas in it's
wake. A secondary low moving to the south Tuesday night through
Wednesday will enhance the gradient even further. Gale
watches warnings may be required for some of our waters given
the potential for enhanced gradients and periods of 40-50 kt low
level geostrophic flow. We expect scas and or possible gale
watches to go up sometime on Monday as this event unfolds.

Rip currents: there will be enhanced risk for rip currents
beginning Tuesday as elevated northeast winds and swell impact
the beaches.

Tides coastal flooding
Between strong high pressure building from the north and low
pressure developing off the coast, strong northeast winds will
create elevated tide levels along the coast Tuesday through
Thursday. While astronomical factors do not favor tidal
flooding, probabilistic guidance depicts a low chance for minor
salt water flooding, especially Wednesday. We will continue to
assess this scenario during the next several days.

Equipment
The kclx radar remains out of service. Repairs are expected to
be completed Monday.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term... Bsh
short term...

long term... Jrl
aviation... Bsh
marine... Spr
tides coastal flooding...

equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 24 mi43 min SSE 1 G 1.9 62°F 61°F1021.9 hPa
SAXG1 - Sapelo Island Reserve, GA 37 mi73 min SSE 6 64°F 1021 hPa (-1.0)60°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 45 mi83 min SSE 5.8 G 7.8 65°F 63°F2 ft1021.9 hPa (-0.0)62°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, GA11 mi77 minN 010.00 miFair58°F54°F89%1021.3 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA13 mi17 minN 010.00 miFair55°F53°F97%1020.9 hPa
Savannah-Hilton Head International Airport, GA15 mi20 minN 010.00 miFair55°F53°F93%1021.5 hPa

Wind History from SVN (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmE8E10SE9SE10E8E6
G15
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--SE8SE7SE5--SE3CalmCalm
1 day agoW8W6W5W7W6NW4N3N9NE9E12E15E11E12E9E11E6SE8E8SE6E4CalmCalmCalmCalm
2 days agoW7W8W8W10W7W7W6NW10NW10NW8NW7W6
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Tide / Current Tables for Highway bridge, Ogeechee River, Georgia
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Highway bridge
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Mon -- 03:23 AM EDT     1.16 feet High Tide
Mon -- 07:22 AM EDT     Sunrise
Mon -- 10:42 AM EDT     Moonset
Mon -- 10:49 AM EDT     -0.05 feet Low Tide
Mon -- 03:42 PM EDT     1.03 feet High Tide
Mon -- 07:39 PM EDT     Sunset
Mon -- 10:55 PM EDT     -0.01 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.711.11.110.90.60.40.2-0-00.10.40.81110.80.60.40.20-0

Tide / Current Tables for Fort McAllister, Ogeechee River, Georgia
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Fort McAllister
Click for Map
Mon -- 12:52 AM EDT     7.71 feet High Tide
Mon -- 07:22 AM EDT     Sunrise
Mon -- 07:40 AM EDT     -0.37 feet Low Tide
Mon -- 10:42 AM EDT     Moonset
Mon -- 01:11 PM EDT     6.86 feet High Tide
Mon -- 07:39 PM EDT     Sunset
Mon -- 07:46 PM EDT     -0.10 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.37.77.26.24.62.71-0.1-0.30.82.74.66.16.86.65.74.42.81.30.2-0.10.82.54.3

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.
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Wind Forecast for Charleston, SC (2,6,7,8)
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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.