Monday, November30, 2020
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L-36.com

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 7:05AMSunset 5:21PM Monday November 30, 2020 12:19 PM EST (17:19 UTC) Moonrise 5:41PMMoonset 7:14AM Illumination 100% Phase: Full Moon; Moon at 15 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- 1200 Pm Est Mon Nov 30 2020
.gale warning in effect until 3 pm est this afternoon...
This afternoon..W winds 20 to 25 kt with gusts to 30 kt. Seas 4 to 6 ft, subsiding to 4 to 5 ft.
Tonight..W winds 20 to 25 kt with gusts to 30 kt. Seas 3 to 4 ft.
Tue..W winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the afternoon.
Tue night..NW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft.
Wed..NW winds 10 to 15 kt, becoming N 5 to 10 kt in the afternoon. Seas 2 ft.
Wed night..NE winds 5 to 10 kt. Seas 2 ft in the evening, then seas 1 foot.
Thu..E winds 5 to 10 kt. Seas 2 ft.
Thu night..SE winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers.
Fri..SW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers.
Fri night..NW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers.
AMZ300 1200 Pm Est Mon Nov 30 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A strong storm system will affect the region this morning. Cold high pressure will slowly build in its wake and persist through the rest of the week. A cold front will then push through the area Friday.


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 301701 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1201 PM EST Mon Nov 30 2020

SYNOPSIS. A strong storm system will affect the region this morning. Cold high pressure will slowly build in its wake and persist through the rest of the week. A cold front will then push through the area Friday.

NEAR TERM /THROUGH TONIGHT/. As of Noon: I will issue a quick update to remove headlines to the coastal Wind Advisory.

As of 11 AM: Latest KCLX images indicated that the line of showers and thunderstorms associated with the cold front have pushed east of the marine zones. The updated forecast will feature no mentionable PoPs through the rest of the day. Winds have settled down from the daybreak surge that developed around the cold front passage. However, Lake Wind Advisory wind gusts will continue until mid Tuesday morning, the Lake Wind Advisory has been extended. Temperatures have likely peaked earlier this morning, temperatures should slowly cool through the rest of today.

Previous Discussion: Today: No big changes with the latest update. Cold front is pushing quickly through inland areas and will push offshore in the next several hours. Still a small concern for an isolated severe storm near the SC coast with damaging winds and/or a tornado. Otherwise, winds will remain elevated even outside the showers and storms, likely strongest near the SC coast where a Wind Advisory is in effect. Still may need to expand it a bit farther inland into the Lowcountry as per high-res model wind gust progs. Cooler and drier air will move in behind the front. High temperatures should occur near daybreak and then generally fall through the day.

Tonight: The broad upper low/trough will shift toward the East Coast as low-level high pressure builds from the southwest. After a lull in winds early in the evening we should see another surge overnight as much colder air moves into the area. Lows should fall back to near freezing well inland and closer to 40 near the coast, although wind chills will likely make it feel like the mid to upper 20s inland and near freezing even at the coast. As a reminder, our local frost/freeze program ends today (based on climatology) so we will not be issuing any Frost Advisories or Freeze Warnings for tomorrow morning.

Lake Moultrie: A Lake Wind Advisory remains in effect for Lake Moultrie into this afternoon for gusty southwest to west winds up to 30 kt. We may need to extend the Advisory into tonight as gusts could stay near 25 kt.

SHORT TERM /TUESDAY THROUGH THURSDAY/. A dry and cold air mass will build in the wake of the front, with the center of high pressure gradually shifting over the region by Wednesday and prevailing through the period. Strong CAA will continue through Tuesday as WNW winds at H85 remain elevated over a sharp temperature gradient. Gusty winds over land will continue through Tuesday and are expected to subside overnight. Highs will only reach the upper 40s inland and near 50F along the coast. A hard freeze is likely Tuesday night over the interior counties with low temps dropping to the mid 20s inland and low 30s along the coast. A gradual warming trend will occur over the next couple of days with high temperatures in the mid 50s on Wednesday and low/mid 60s Thursday, with min temps increasing gradually as well.

LONG TERM /THURSDAY NIGHT THROUGH MONDAY/. High pressure will dominate the region through the week. This weekend, expect a slight change in the overall pattern as the sfc high moves offshore over the Central Atlantic and a deep upper-level trough/H5 closed low located over the Tennessee Valley helps push a cold front through the area Friday. In response to the upper-level system, a sfc low eventually develops along the East Coast by Saturday. There is somewhat large model discrepancy in terms of where this system will spawn; however it is likely to develop to our north. A system that forms offshore the Mid-Atlantic states, will likely trend toward a drier forecast for our area; however, a system developing offshore the Carolina Coast could in turn bring sufficient moisture. That combined with upper-level forcing would allow scattered showers to develop over the area Friday night into Saturday. Thereafter, rain-free conditions are expected through the remainder of the period as high pressure returns.

AVIATION /17Z MONDAY THROUGH FRIDAY/. KCHS/KSAV: MVFR conds possible for the next few hours with showers and possible tstms ahead of a cold front which will pass through late morning, initially at KSAV and then at KCHS. Some low- level moisture will linger into tonight but we should stay mostly VFR.

Extended Aviation Outlook: VFR. Gusty winds will persist through Tuesday evening.

MARINE. Today/Tonight: Dangerous marine conditions expected much of the period as a strong cold front moves through this morning followed by strong cold advection. Gales are likely for all waters into this afternoon, persisting into early evening at least for the Charleston County nearshore waters. With a lull anticipated early this evening and then another surge overnight we could see more gales so the warnings may eventually need to be extended for all or part of the area. Also, a few strong to severe storms with gusts over 50 kt and waterspouts are possible through the morning.

Tuesday through Saturday: In the wake of the front, wind will shift from the west and speeds will gradually decrease. Gale Warnings will likely end by Monday evening. Small Craft Advisory winds and seas should remain through Tuesday. Marine conditions will begin to improve Tuesday night with gusty northwest winds decreasing to less than 15 knots and becoming northeast by Wednesday. Seas will follow, dropping to 2-3 feet or less across all waters by Wednesday and continuing through Thursday. Friday, winds will shift from out of the south and will increase slightly with gusts near 20 knots. Seas will gradually build up to 4 feet in the nearshore waters out 20 nm and 4-5 feet in the outer GA leg.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . Lake Wind Advisory until 10 AM EST Tuesday for SCZ045. MARINE . Gale Warning until 3 PM EST this afternoon for AMZ330-352-354- 374. Gale Warning until 7 PM EST this evening for AMZ350.



NEAR TERM . NED SHORT TERM . BRM LONG TERM . BRM AVIATION . BRM/RJB MARINE . BRM/RJB


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 11 mi50 min W 19 G 25 60°F 65°F1008.1 hPa
41033 40 mi72 min W 23 G 33 62°F 66°F1006.4 hPa
SAXG1 - Sapelo Island Reserve, GA 46 mi80 min W 18 63°F 1009 hPa (+3.0)53°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 48 mi30 min W 23 G 27 62°F 70°F6 ft1007.8 hPa (+1.9)53°F
ACXS1 - ACE Basin Reserve, SC 48 mi95 min SW 7 64°F 1006 hPa55°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 mi24 minW 23 G 2610.00 miMostly Cloudy and Windy62°F47°F59%1007.1 hPa
Savannah-Hilton Head International Airport, GA7 mi27 minW 15 G 2410.00 miMostly Cloudy59°F48°F67%1007.8 hPa
Hilton Head Island, Hilton Head Airport, SC24 mi30 minW 14 G 259.00 miMostly Cloudy63°F51°F68%1007.1 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hrN5N4NW4NE4CalmN4CalmCalmSE4CalmSE3S5S10S13S10
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1 day agoNE5NE5E9NE5N5N5N6N4N6N7NE4N3N4N4NE6NE5N5NE3N6N5N7NE5N5NW5
2 days agoN5NW6W7W5W3W3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN6NE6N3NE5E8NE5NE7

Tide / Current Tables for Savannah (Bull Street), Georgia
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Savannah (Bull Street)
Click for Map
Mon -- 02:22 AM EST     0.18 feet Low Tide
Mon -- 04:32 AM EST     Full Moon
Mon -- 07:06 AM EST     Sunrise
Mon -- 07:14 AM EST     Moonset
Mon -- 08:13 AM EST     8.75 feet High Tide
Mon -- 02:57 PM EST     0.63 feet Low Tide
Mon -- 05:19 PM EST     Sunset
Mon -- 05:40 PM EST     Moonrise
Mon -- 08:33 PM EST     7.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.71.20.30.51.94.16.488.78.57.55.94.12.41.20.61.334.96.67.57.66.95.6

Tide / Current Tables for Savannah River Entrance, Georgia Current (2) (expired 1999-12-31)
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Savannah River Entrance
Click for Map
Mon -- 03:11 AM EST     0.00 knots Slack
Mon -- 04:32 AM EST     Full Moon
Mon -- 05:36 AM EST     1.63 knots Max Flood
Mon -- 07:05 AM EST     Sunrise
Mon -- 07:13 AM EST     Moonset
Mon -- 08:45 AM EST     -0.00 knots Slack
Mon -- 12:25 PM EST     -2.53 knots Max Ebb
Mon -- 03:57 PM EST     0.00 knots Slack
Mon -- 05:18 PM EST     Sunset
Mon -- 05:39 PM EST     Moonrise
Mon -- 06:02 PM EST     1.25 knots Max Flood
Mon -- 08:49 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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-2.3-1.9-1.2-0.20.81.51.61.10.5-0.2-1.1-1.9-2.5-2.4-1.9-100.91.210.5-0.1-0.8-1.6

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Charleston, SC
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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.