Saturday, January23, 2021
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Marine Weather and Tides
Garden City, GA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 7:21AMSunset 5:51PM Saturday January 23, 2021 9:11 AM EST (14:11 UTC) Moonrise 1:34PMMoonset 2:54AM Illumination 77% Phase: Waxing Gibbous; Moon at 10 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- 746 Am Est Sat Jan 23 2021
Today..N winds 10 to 15 kt with gusts to 20 kt, becoming ne 15 to 20 kt this afternoon. Seas 2 ft, building to 3 to 4 ft this afternoon.
Tonight..NE winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Sun..NE winds 10 to 15 kt. Seas 2 to 3 ft.
Sun night..E winds 5 to 10 kt, becoming se after midnight. Seas 2 to 3 ft.
Mon..S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft, building to 3 to 4 ft in the afternoon.
Mon night..SW winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Tue..SW winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers.
Tue night..W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
Wed..NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
Wed night..SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers.
AMZ300 746 Am Est Sat Jan 23 2021
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail through the weekend. A cold front will impact the region Tuesday, followed by another storm system mid week. High pressure will return late 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 231251 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 751 AM EST Sat Jan 23 2021

SYNOPSIS. High pressure will prevail through the weekend. A cold front will impact the region Tuesday, followed by another storm system mid week. High pressure will return late week.

NEAR TERM /THROUGH TONIGHT/. As of 750 AM: Observations of fog across the Coastal Empire of GA have improved over the past half hour. The Dense Fog Advisory will expire at 8 AM. Patchy fog may linger over the area until 9 AM.

As of 650 AM: Based on the latest observations, I will remove another tier of counties on the west side of the Dense Fog Advisory. Areas across inland GA have cooled into the mid 30s, these areas may cool another degree or two before sunrise.

As of 540 AM: Satellite and observations indicated that the fog has improved considerable across portions of inland GA and SC. IR satellite continued to so some dense fog over the Savannah River and other mainstem rivers. I will remove a northern tier of counties from the Dense Fog Advisory. To the east, observations, web cams, and satellite indicated that dense fog continued across portions of the Coastal Empire and Jasper Co. In addition, inland areas have cooled a bit below the current forecast, I will adjust the forecast accordingly.

As of 4 AM: Sfc observations and web cams indicated dense fog across portions of GA and SC. The area of dense fog is detectable using the Nighttime Microphysics RGB from GOES-East. The fog should continue until upstream sfc trough passes across the area or mixing onset at sunrise. A Dense Fog Advisory has been issued for the area until 8 AM.

Rest of today, dry high pressure centered over the Mid West will ridge south across the forecast area. H5 heights are forecast to gradually increase from the west. Once the fog this morning dissipates, conditions should remain sunny to mostly sunny through the day. Favor a blend of the warmer MOS, high temperatures are forecast to range from the low 60s across SE GA to the upper 50s across the SC Lowcountry.

Tonight: Sfc pressures will continue to rise across the forecast area as the center of the high builds over middle NC. Light and steady NE winds should keep the llvl dry through tonight. However, a warm front is expected to lift across the Deep South after midnight, resulting in high clouds to increase from the SW. Guidance agrees that the onset of showers associated with WAA has trended later, the forecast for tonight will not feature any showers. Low temperatures should range from the mid 30s inland to around 40 near the coast.

SHORT TERM /SUNDAY THROUGH TUESDAY/. Surface high pressure centered to the north will ease into the Atlantic on Sunday, while a weak coastal trough lingers offshore. The day should be mostly dry although there will be a notable increase in cloud cover. Temperatures will be near normal, mainly in the upper 50s to low 60s. Lows Sunday night will range from the upper 40s inland to low/mid 50s closer to the coast.

Low pressure will eject out of the Southern Plains Sunday night, allowing a warm front to lift north through the area. This will place the forecast area solidly within the warm sector for Monday. Aloft, ridging will dominate. The best forcing will be to the north and west, so while a few showers can't be ruled out, a good majority of the area (especially Georgia zones) is expected to remain precip- free. Strengthening warm air advection will boost temperatures into the low to mid 70s across most locations away from the coast. Similarly, it will remain very mild Monday night with lows only falling to around 60/low 60s (for reference, this is near or slightly above climatological maximums for late January).

The aforementioned low will track across the mid-Atlantic states Tuesday, eventually dragging a cold front into the area. The front becomes parallel to the flow aloft, so it will lose its forward momentum and likely stall in the vicinity. Models continue to show precipitation associated with the front largely decreasing in intensity and coverage as it enters, so rainfall amounts will stay fairly light. However, late in the day, there could be some enhancement across southeast Georgia. Expect another day with temperatures well above climo. The current forecast features highs in the mid 70s, although some guidance indicates this could even be slightly underdone.

LONG TERM /TUESDAY NIGHT THROUGH FRIDAY/. Active weather pattern in store for mid week. A potent mid level shortwave and associated surface reflection will track across the eastern CONUS Wednesday into Thursday. While there are still discrepancies between models regarding placement and strength of the low, the set-up appears favorable for a decent rainfall event. Drier and cooler conditions expected late week behind this system as high pressure returns.

AVIATION /13Z SATURDAY THROUGH WEDNESDAY/. Prior to the 12Z TAFs, VFR conditions were observed at KCHS with LIFR ceilings and vis with fog at KSAV. IR satellite indicated areas of fog and stratus upstream of KSAV. It appears that fog and stratus will linger early this morning, expected to clear by 1330Z. The rest of the TAF period will feature clear to mostly clear conditions with steady ENE winds.

Extended Aviation Outlook: VFR is expected over the weekend. Flight restrictions possible in low clouds and showers early to mid week.

MARINE. Today and tonight: Areas of fog, locally dense, will exist across the nearshore waters this morning. The lowest visibility is expected over the upriver areas of the Ports of Savannah and Charleston. The fog should dissipate with the first 1 to 2 hours of daylight this morning. Through the rest of the day, dry high pressure centered over the Mid West will ridge south across the marine zones. The sfc pattern will yield strengthening NE winds this morning, with gusts above 20 kts possible during the mid-day. In fact, AMZ350 may approach Small Craft Advisory levels briefly late this morning into early this afternoon. Steady NE winds will remain across the nearshore waters tonight. Seas are expected to gradually build through this evening, peaking between 2-5 ft.

Sunday through Thursday: Northeast/east winds on Sunday will veer to the south on Monday following the passage of a warm front. Winds and seas will then increase Monday night and Tuesday ahead of an approaching cold front, and Small Craft Advisories will be possible for portions of the waters. Improvement is expected for mid week, although it will be short-lived as conditions deteriorate Thursday behind a departing low pressure system. Another round of advisories are likely.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . None.



NEAR TERM . NED SHORT TERM . ETM LONG TERM . ETM AVIATION . NED MARINE . NED


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 11 mi53 min N 5.1 G 7 45°F 52°F1020.6 hPa
41033 40 mi63 min NNE 12 G 16 49°F 53°F1020.1 hPa
SAXG1 - Sapelo Island Reserve, GA 46 mi71 min N 5.1 50°F 1019 hPa (+2.0)50°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 48 mi81 min N 9.7 G 9.7 53°F 55°F1 ft1019.1 hPa (+1.9)51°F
ACXS1 - ACE Basin Reserve, SC 48 mi86 min Calm 40°F 1020 hPa40°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Savannah-Hilton Head International Airport, GA7 mi18 minNNE 610.00 miFair47°F44°F90%1020.8 hPa
Hilton Head Island, Hilton Head Airport, SC24 mi21 minNNE 810.00 miFair46°F46°F100%1021 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hrS6SE8S8S6S5CalmS3S5S3SW3SW3S4SW3SW6SW6W4W5W6W6W6W11W14
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SW4CalmW5CalmCalmCalmW4CalmCalmCalmCalmCalmCalmW3NW3CalmCalmCalmS4W5
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Tide / Current Tables for Savannah (Bull Street), Georgia
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Savannah (Bull Street)
Click for Map
Sat -- 02:54 AM EST     Moonset
Sat -- 04:03 AM EST     7.33 feet High Tide
Sat -- 07:22 AM EST     Sunrise
Sat -- 10:43 AM EST     1.29 feet Low Tide
Sat -- 01:33 PM EST     Moonrise
Sat -- 04:30 PM EST     6.63 feet High Tide
Sat -- 05:50 PM EST     Sunset
Sat -- 10:52 PM EST     0.50 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.44.15.76.97.376.14.73.32.21.51.323.24.65.96.56.65.94.631.70.80.5

Tide / Current Tables for Savannah River Entrance, Georgia Current (2) (expired 1999-12-31)
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Savannah River Entrance
Click for Map
Sat -- 01:21 AM EST     1.18 knots Max Flood
Sat -- 02:53 AM EST     Moonset
Sat -- 04:36 AM EST     -0.00 knots Slack
Sat -- 07:21 AM EST     Sunrise
Sat -- 08:19 AM EST     -2.01 knots Max Ebb
Sat -- 11:58 AM EST     0.00 knots Slack
Sat -- 01:32 PM EST     Moonrise
Sat -- 01:48 PM EST     0.79 knots Max Flood
Sat -- 04:27 PM EST     -0.00 knots Slack
Sat -- 05:49 PM EST     Sunset
Sat -- 08:32 PM EST     -1.93 knots Max Ebb
Sat -- 11:56 PM EST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.71.11.10.70.3-0.2-0.9-1.6-2-1.9-1.5-0.800.60.80.50.2-0.2-0.7-1.4-1.9-1.9-1.5-0.8

Weather Map
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wmap_A
GEOS 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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Ground Weather Radar Station




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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 numerous 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.