Tuesday, January23, 2018 L-36.com


Marine Weather and Tides
Garden City, GA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:21AMSunset 5:51PM Tuesday January 23, 2018 2:52 AM EST (07:52 UTC) Moonrise 11:21AMMoonset 12:00AM Illumination 40% Phase: Waxing Crescent; Moon at 6 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- 1209 Am Est Tue Jan 23 2018
Rest of tonight..S winds 15 kt. Seas 2 to 3 ft. Showers likely with a slight chance of tstms. Patchy dense fog with vsbys 1 nm or less.
Tue..SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Showers likely with a slight chance of tstms in the morning, then a slight chance of showers in the afternoon.
Tue night..NW winds 10 to 15 kt. Seas 2 to 3 ft.
Wed..NW winds 5 to 10 kt. Seas 2 ft.
Wed night..NW winds 10 to 15 kt, becoming N with gusts to 20 kt after midnight. Seas 2 to 3 ft.
Thu..NE winds 10 to 15 kt. Seas 2 to 3 ft.
Thu night..NE winds 10 to 15 kt. Seas 2 to 3 ft.
Fri..NE winds 10 to 15 kt. Seas 2 to 3 ft.
Fri night..E winds 10 to 15 kt. Seas 2 to 3 ft.
Sat..E winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers.
Sat night..SE winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 1209 Am Est Tue Jan 23 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail today as a weak coastal trough moves inland. A cold front will move through the region Tuesday morning, followed by high pressure through the end of the week. Another cold front will likely impact the area early next week.

7 Day Forecast for Marine Location Near Garden City, GA
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location: 32.07, -81.11     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 230525
afdchs
area forecast discussion
national weather service charleston sc
1225 am est Tue jan 23 2018

Synopsis
High pressure will prevail today as a weak coastal trough moves
inland. A cold front will move through the region Tuesday
morning, followed by high pressure through the end of the week.

Another cold front will likely impact the area early next week.

Near term until 6 am this morning
Kcae kjgx radar shows showers slowly filling in as upper forcing
increases ahead of a powerful upper-level low. Likely pops were
maintained for all areas through daybreak. Temperatures have
been slowly climbing over the past few hours with some upper 60s
recently reported. Do expect temperatures to fall as rain fills
in, but still expect lows no lower than the lower 60s.

Some of our observations and webcams have shown reduced vsbys
and low stratus from coastal chatham to beaufort and charleston
counties. Low level wind fields will continue to build and this
should ensure that the fog along the beaches and barrier islands
will be transient and mainly patchy in nature. Very mild temps
will continue overnight with readings above 60 degrees most
areas away from the land sea interface.

Tybee webcams still show patches of sea fog occasionally moving
onshore. This trend will continue for the next few hours and may
spread up into the lower south carolina coast.

Short term 6 am this morning through Thursday
Tuesday: a cold front will shift offshore during late morning hours
with dry high pressure building in its wake. FROPA will put an end
to precip generally from west to east by noon. Temps will remain
mild until FROPA occurs, peaking in the upper 60s to around 70
degrees before going through a cooling trend during mid-late
afternoon. Cold air advection behind the front should also support
deep mixing in the low-lvls, creating gusty winds around 15-20 mph
for much of the day. A lake wind advisory could be needed Tuesday
afternoon. Skies should clear out by the evening, setting up a fair
radiational cooling night as high pressure settles over the region.

In general, low temps should dip into the upper 30s away from the
immediate coast.

Wednesday and Thursday: dry high pressure will dominate the pattern
during the second half of the week over southeast south carolina or
southeast georgia. Despite sunny skies, weak cold air advection to
the region will keep temps cooler than experienced early week. In
general, high temps will peak in the upper 50s lower 60s on
Wednesday under a zonal flow aloft, then peak a degree or two cooler
on Thursday behind a h5 shortwave shifting offshore. Wednesday night
lows should dip in the mid 30s away from the immediate coast.

Long term Thursday night through Monday
High pressure will prevail Thursday night into Friday, bringing dry
conditions and above normal temperatures. Models are in excellent
agreement showing a strong cold front approaching from the west
Saturday, then moving through the region on Sunday. Given the great
agreement, we have pops gradually increasing on Saturday, then rain
highlighted on Sunday. Periods of heavy rain and thunderstorms are
not out of the question, but we're still several days out.

Aviation 06z Tuesday through Saturday
Primary concern:
* rain timing with MVFR cigs
MVFR CIGS have been reluctant to develop this morning. Do expect
cigs to lower as rain fills in, but should only drop to MVFR
thresholds at times. Rains will push across ksav roughly 08-12z
and 09-13z at kchs. Cold front will not reach the terminals
until early afternoon, after which, winds will turn west and
become gusty. Gusts 20-25 kt possible. Winds remain too
elevated through FROPA for low-level wind shear despite
increasing winds aloft.

Extended aviation outlook:VFR conditions are expected at both chs
and sav terminals through late week. Gusty winds around 15-20 mph
are possible at both terminals Tuesday afternoon behind a cold
front.

Marine
Overnight: sea fog is a cause for concern, but overall conditions
for more than patchy dense fog is mainly low. A marine weather
statement was issued earlier this evening and we may need some
additional statements overnight as periodic bouts of sea fog
brush up along the coast across chilly and stable shelf waters.

The sub-tropical atlantic ridge will pull further east as a
cold front travels quickly through the tn valley and northern
gulf coast region into the SE states before daybreak. Warm
advection will negate a good chunk of the 35-40 kt low level
winds from mixing down, but we still expect conditions to reach
marginal sca's on the amz350 and amz374 waters prior to sunrise.

Thus we have advisory flags for these bodies of water starting
at 5 am Tuesday due to frequent gusts of 25 kt or higher and
some 6 foot seas (especially on the outer ga waters). Isolated
t-storms are also expected in advance of the cold front after
midnight.

Tuesday and Tuesday night: a cold front will push through the
coastal waters late morning with dry high pressure building in its
wake. A somewhat enhanced pressure gradient along FROPA and cold air
advection behind it will support marginal small craft advisory level
conditions in northern south carolina waters and offshore georgia
waters Tuesday morning into Tuesday afternoon. Thus, a small craft
advisory will be ongoing until 5 pm Tuesday. A small craft advisory
could also be needed for the chs harbor Tuesday morning, but
confidence remains lower. Conditions will improve over all waters
Tuesday night as the pressure gradient weakens while high pressure
settles over the region.

Wednesday through Friday: sfc high pressure will dominate the
coastal waters during the second half of the week, but there could
be a period of enhanced winds Wednesday night when an h5 shortwave
shifts offshore. A small craft advisory could eventually be needed
for some of the waters. Conditions are then expected to remain below
small craft advisory levels late week with winds at or below 20 kt
and seas as high as 4-5 ft.

Climate
Record high minimums for 23 january:
kchs: 62 1999
kcxm: 66 1937
ksav: 65 1937

Equipment
The kclx radar remains out of service until further notice.

Repairs are ongoing. Adjacent radars include: kltx, kcae, kjgx,
kvax and kjax.

The downtown charleston observation site (chls1 kcxm) remains
out of service until further notice.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory from 5 am early this morning to 5 pm est
this afternoon for amz350-374.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 11 mi52 min SSW 9.9 G 14 58°F 47°F1014.9 hPa (-2.0)
41033 40 mi44 min S 7.8 G 9.7 52°F 49°F1014.2 hPa
SAXG1 - Sapelo Island Reserve, GA 46 mi52 min S 8 59°F 1015 hPa (-2.0)59°F
ACXS1 - ACE Basin Reserve, SC 48 mi67 min S 1.9 63°F 1014 hPa61°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 48 mi62 min S 9.7 G 9.7 57°F 52°F2 ft1015.1 hPa (-1.8)56°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, GA3 mi56 minS 9 G 1710.00 miMostly Cloudy65°F62°F91%1013.8 hPa
Savannah-Hilton Head International Airport, GA7 mi59 minS 15 G 2510.00 miMostly Cloudy68°F64°F87%1014.3 hPa
Hilton Head Island, Hilton Head Airport, SC24 mi57 minS 9 G 1510.00 miOvercast63°F60°F94%1014.9 hPa

Wind History from SVN (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmE4E7E5E5SE6SE7S9SE9SE9SE6E5SE8SE6S6S8S12S9
G15
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1 day agoCalmCalmSW3S3CalmCalmCalmCalmNW3CalmCalmSW4SE8S5S9S3SE5SE5CalmCalmCalmCalmCalmCalm
2 days agoCalmCalmW5CalmCalmCalmCalmNW5W4W8NW8W10SW7SW7SW3S4S6S4S3CalmS3CalmSW3W5

Tide / Current Tables for Savannah (Bull Street), Georgia
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Savannah (Bull Street)
Click for Map
Tue -- 06:31 AM EST     0.19 feet Low Tide
Tue -- 07:22 AM EST     Sunrise
Tue -- 11:20 AM EST     Moonrise
Tue -- 12:25 PM EST     7.51 feet High Tide
Tue -- 05:49 PM EST     Sunset
Tue -- 07:08 PM EST     -0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.57.16.14.62.81.20.30.31.33.15.16.77.47.46.75.53.81.90.5-0.10.31.83.95.9

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Tue -- 01:10 AM EST     -0.00 knots Slack
Tue -- 03:51 AM EST     -1.79 knots Max Ebb
Tue -- 07:21 AM EST     0.00 knots Slack
Tue -- 07:21 AM EST     Sunrise
Tue -- 09:58 AM EST     1.70 knots Max Flood
Tue -- 11:19 AM EST     Moonrise
Tue -- 01:37 PM EST     -0.00 knots Slack
Tue -- 04:23 PM EST     -1.76 knots Max Ebb
Tue -- 05:49 PM EST     Sunset
Tue -- 07:47 PM EST     0.00 knots Slack
Tue -- 10:28 PM EST     1.98 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.1-0.7-1.5-1.8-1.5-1-0.30.61.41.71.40.90.4-0.3-1.2-1.7-1.7-1.3-0.70.21.31.91.9

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Charleston, SC (2,6,7,8)
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Ground Weather Radar Station Charleston, SC
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weather_mapweather_map weather_map

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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.