Monday, October14, 2019 L-36.com


Marine Weather and Tides
Richmond Hill, GA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:26AMSunset 6:55PM Monday October 14, 2019 10:26 PM EDT (02:26 UTC) Moonrise 6:44PMMoonset 6:59AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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- 944 Pm Edt Mon Oct 14 2019
Tonight..SE winds 5 kt, becoming nw late. Seas 1 foot. A slight chance of showers after midnight.
Tue..N winds 5 to 10 kt, becoming E in the afternoon. Seas 1 foot. Showers likely in the morning, then showers with a slight chance of tstms in the afternoon.
Tue night..SE winds 5 to 10 kt, becoming S 15 to 20 kt after midnight. Seas 2 to 3 ft. Showers with a slight chance of tstms.
Wed..W winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft. A slight chance of tstms. Showers.
Wed night..NW winds 15 kt with gusts to 20 kt. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms in the evening.
Thu..N winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 ft.
Thu night..N winds 5 to 10 kt. Seas 2 ft in the evening, then seas 1 foot.
Fri..NE winds 5 to 10 kt. Seas 2 ft.
Fri night..E winds 10 kt. Seas 2 ft.
Sat..E winds 10 to 15 kt. Seas 2 ft. A slight chance of showers.
Sat night..E winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 944 Pm Edt Mon Oct 14 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A stationary front will remain over or near the area until a strong cold front moves through on Wednesday. High pressure returns for the second half of the week.


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 142326
afdchs
area forecast discussion
national weather service charleston sc
726 pm edt Mon oct 14 2019

Synopsis
A stationary front will remain over or near the area until a
strong cold front moves through on Wednesday. High pressure
returns for the second half of the week.

Near term until 6 am Tuesday morning
On the early evening update, minor tweaks to temps and sky cover
as dry weather continues over the region, although moisture was
increasing at a steady clip along the northeast gulf coast.

Tonight: a potent and stacked cyclone aloft near the southern
shores of hudson bay in canada will slowly move northeast, as
strong short wave drops through the northern plains. We're
within a zonal flow to the south of the cyclonic pattern of
these features, while an elongated and strong anticyclone
prevails over the gulf of mexico. At the surface, the
stationary front will descend into georgia late, stretching in
an east-west alignment near the i-16 corridor by morning as a
wedge of high pressure pushes out of the central appalachians.

Conditions will be rainfree for much of the night underneath the
surface high and lack of forcing aloft. But a mid level impulse
will ride through georgia after about 4 or 5 am and occurs in
tandem with strengthening isentropic ascent and moisture
advection from the gulf. It is after this time that we
anticipate light to perhaps moderate rains developing near and
south of i-16 as we approach daybreak. Our pops will range from
10% or less over the charleston quad-county area, 20-30% south
of there to i-16, and as high as 40-50% south to the altamaha
river basin. We have opted to remove thunder from the forecast
for late tonight lacking any instability, either surface or
aloft.

There looks to be good radiational cooling the first part of the
night over our northern zones, before increasing mid and high
level clouds overspreads the area with lowering ceilings
overnight. This will put a cap on how cool temps can get,
especially south, so we have a large range from the upper 50s
(and potentially cooler) in the francis marion national forest
and rural spots of dorchester and colleton county, to as high
as the upper 60s over some immediate coastal areas and many
places south of i-16 in georgia.

Short term 6 am Tuesday morning through Thursday
Tuesday and Wednesday: a wet period of weather is expected as a
stationary front over or near southern georgia begins to lift north
as a warm front Tuesday well in advance of a strong cold front
expected to sweep through the region Wednesday. A fair amount of
isentropic ascent associated with the warm front and deep moisture
return characterized by pwats near 2.00-2.25 inches will be more
than sufficient to support numerous to widespread showers across the
area, beginning across southern most areas Tuesday morning, then
spreading north into parts of southeast south carolina by Tuesday
afternoon. Extensive cloud cover should limit overall instability,
but temps should warm a few degrees each day as southerly flow
persists ahead of the approaching cold front. In general, high temps
should peak in the mid upper 70s Tuesday, then around 80 degrees on
Wednesday before cold fropa. Afternoon heating should be sufficient
for a few thunderstorms in addition to widespread showers given
substantial forcing arriving with the warm cold fronts and longwave
trough aloft. The main issue with the forecast will be how much
rainfall the area receives before the cold front pushes offshore
Wednesday. A zonal flow initially aloft and the development of sfc
low pressure near the warm front will play a large role in how much
rain locations see across the area. At this time, most areas should
experience 1-2 inches of rainfall accumulation, which could enhance
a shallow coastal flooding risk along the southeast south carolina
coast should precip occur during the morning high tide cycles
Tuesday and or Wednesday (see below).

Thursday: dry and noticeably cooler conditions will spread across
the area with high pressure building behind a departing cold front.

In general, high temps will struggle to approach the low mid 70s
despite a full day of Sun and westerly flow aloft.

Long term Thursday night through Monday
Models are in good agreement showing broad high pressure centered
over the tn valley Thursday night, moving eastward and offshore by
Saturday. The high will bring our area dry conditions through most
of Friday. Over the weekend moisture increases from the south and
that will lead to an increasing risk of showers. High temperatures
will gradually warm up in the long term.

Aviation 23z Monday through Saturday
Kchs:VFR conditions are expected through at least midday Tuesday,
then over-running rains moving in from the southwest with a
warm front after 18z will tend to lower CIGS and perhaps vsbys
late. MVFR CIGS are likely by the end of the day.

Ksav:VFR into later tonight, with lowering ceilings and
eventually light to moderate rains developing early Tuesday in
advance of a warm front. We have introduced MVFR CIGS and vsbys
with rains becoming more convective in nature after mid
afternoon. Ifr are certainly possible during the last 2-4 hours
of the 00z cycle.

Extended aviation outlook: periods of showers along with a few
thunderstorms will likely impact both chs and sav terminals Tuesday
night into Wednesday morning until a strong cold front sweeps
through the region. Flight restrictions are expected at either
terminal along with gusty winds. Dry high pressure will then
result inVFR conditions at both terminals Thursday through
Saturday.

Marine
Tonight: a stationary front will sag south into the waters as a
wedge of high pressure builds inland from the central appalachians.

The gradient is slack initially, but there will be a small
increase in winds to the n-ne over the charleston county waters
late as pressures rise in sync with subtle cool advection. On
average, winds will be no more than about 10 kt and seas just
1-3 ft.

Tuesday through Saturday: a stationary front near the area will
slowly lift north as a warm front with numerous to widespread
showers and a few thunderstorms. A relatively weak pressure
gradient will result across coastal waters Tuesday until a
strong cold front approaches the waters Tuesday night into
Wednesday morning. Winds will quickly increase along near the
front, gusting as high as 25-30 kt by daybreak Wednesday,
highest across offshore georgia waters. Seas will also build up
5-7 ft, highest across northern south carolina waters and
offshore georgia waters. Small craft advisories will likely be
needed for much of the coastal waters late Tuesday night into
Wednesday. Even the charleston harbor could need an advisory for
a short time period with gusts approaching 25 kt. Winds seas
will then decrease subside before the departing cold front
Wednesday evening night, ending any small craft advisory across
the coastal waters. Conditions will then remain well below small
craft advisory levels Thursday and Friday as high pressure
builds across coastal waters, then moves east on Saturday.

Tides coastal flooding
Although tides remain elevated and there is a weak onshore flow,
this evening's high tide is forecast to stay just below any
advisory level threshold in downtown charleston. A coastal flood
advisory is currently not anticipated for the 9:00 to 9:30 pm
high tide.

Elevated tides will continue into Thursday, resulting in the
possibility of shallow coastal flooding around the times of the
morning high tide, mainly for downtown charleston and nearby areas.

Additional coastal flood advisories are possible.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term...

short term...

long term...

aviation...

marine...

tides coastal flooding...

climate...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 24 mi57 min SSE 1 G 1.9 77°F 77°F1018.6 hPa
SAXG1 - Sapelo Island Reserve, GA 37 mi87 min S 2.9 76°F 1018 hPa (+1.0)71°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 45 mi37 min S 7.8 G 7.8 79°F 80°F2 ft1018 hPa (+0.9)72°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 mi31 minN 08.00 miFair72°F65°F80%1017.9 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA13 mi31 minN 010.00 miA Few Clouds72°F66°F85%1018.5 hPa
Savannah-Hilton Head International Airport, GA15 mi34 minN 010.00 miPartly Cloudy73°F66°F81%1018.4 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hrS4S6S5NW3W3CalmCalmS4SW4SW3W3W6NW5W7W6CalmW7CalmNW3W3CalmCalmCalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW5SW11SW8SW10SW9SE8SE7S6SE6SE5S8S7S5S5
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm--NW3CalmCalmCalmCalmCalmCalmSE7SE6S5CalmSE3Calm

Tide / Current Tables for Highway bridge, Ogeechee River, Georgia
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Highway bridge
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Mon -- 12:05 AM EDT     1.13 feet High Tide
Mon -- 07:26 AM EDT     0.07 feet Low Tide
Mon -- 07:27 AM EDT     Sunrise
Mon -- 07:59 AM EDT     Moonset
Mon -- 12:18 PM EDT     1.18 feet High Tide
Mon -- 06:54 PM EDT     Sunset
Mon -- 07:43 PM EDT     Moonrise
Mon -- 07:48 PM EDT     0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.11.110.80.60.40.20.10.10.40.711.21.21.10.90.70.50.30.10.10.30.60.9

Tide / Current Tables for Fort McAllister, Ogeechee River, Georgia
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Fort McAllister
Click for Map
Mon -- 04:17 AM EDT     0.50 feet Low Tide
Mon -- 07:27 AM EDT     Sunrise
Mon -- 07:58 AM EDT     Moonset
Mon -- 09:47 AM EDT     7.88 feet High Tide
Mon -- 04:39 PM EDT     0.77 feet Low Tide
Mon -- 06:53 PM EDT     Sunset
Mon -- 07:43 PM EDT     Moonrise
Mon -- 10:09 PM EDT     7.43 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.74.22.61.30.50.82.34.36.37.67.97.36.24.83.31.910.81.83.65.46.87.47.2

Weather Map
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wmap_A
GEOS 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 (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.