Tuesday, December1, 2020
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Marine Weather and Tides
Midway, 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 7:07AMSunset 5:23PM Tuesday December 1, 2020 3:32 AM EST (08:32 UTC) Moonrise 6:27PMMoonset 8:11AM Illumination 99% 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- 317 Am Est Tue Dec 1 2020
.small craft advisory in effect through this afternoon...
Today..W winds 20 to 25 kt with gusts to 30 kt, diminishing to 15 to 20 kt with gusts to 25 kt this afternoon. Seas 3 to 5 ft, subsiding to 2 to 3 ft this afternoon.
Tonight..NW winds 15 to 20 kt. Seas 3 ft.
Wed..NW winds 10 to 15 kt with gusts to 20 kt, becoming N 5 to 10 kt in the afternoon. Seas 2 ft.
Wed night..NE winds 5 to 10 kt. Seas 1 to 2 ft.
Thu..E winds 10 kt. Seas 2 ft.
Thu night..SE winds 5 to 10 kt. Seas 2 to 3 ft.
Fri..S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
Fri night..SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers.
Sat..W winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers.
Sat night..W winds 15 to 20 kt. Seas 2 to 3 ft. A slight chance of showers.
AMZ300 317 Am Est Tue Dec 1 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Cold high pressure will slowly build in and persist through Thursday. A coastal trough develops Friday prior to low pressure developing over the florida panhandle. A cold front will then push through the area Saturday. High pressure gradually builds thereafter.


7 Day Forecast for Marine Location Near Midway, GA
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location: 31.73, -81.21     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 010541 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1241 AM EST Tue Dec 1 2020

SYNOPSIS. Cold high pressure will slowly build in tonight and persist through the rest of the week. A cold front will then push through the area Friday.

NEAR TERM /UNTIL 6 AM THIS MORNING/. No significant changes with the latest update. Earlier rains have ended but some low clouds linger due to low-level moisture and upper lifting. The tight pressure gradient and cold advection will lead to elevated westerly winds gusting to near 30 mph at times. Temperatures should fall to their lowest levels of the season so far for most places, down to near freezing well inland and near 40 at the coast. Minimum wind chills generally near 20 degrees well inland ranging to near freezing along the coast.

Lake Winds: The Lake Wind Advisory will remain in effect.

SHORT TERM /6 AM THIS MORNING THROUGH THURSDAY/. Surface high pressure will expand over the area and remain the dominant feature through Thursday. Aloft, a deep mid level trough over the eastern U.S. will slowly lift northeast through the period, giving way to weak ridging over the Southeast by Thursday. The air mass is extremely dry (PWats generally less than a quarter of an inch), so there is no threat for rainfall. Expect plenty of sun, although there will be an increase in high clouds on Thursday.

The most notable aspect of the forecast is the significantly colder temperatures on tap. Tuesday will be the coldest day of the season thus far as highs top out in the upper 40s. A widespread freeze is expected Tuesday night with lows dropping into the upper 20s across most locations inland of the coast. As a reminder, the local frost/freeze program ends today, so no products will be issued. Thereafter, temperatures will remain below normal but will slowly moderate.

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 /06Z TUESDAY THROUGH SATURDAY/. KCHS/KSAV: No concerns during the 06Z/01 TAF period other than 20-25 kt gusts most of the time until about through about 22-23Z.

Extended Aviation Outlook: VFR.

MARINE. Overnight: Winds will remain strong over the marine area in response to large and steady isallobaric pressure rises and strengthening cold advection. As a result we have extended the Gale Warnings for the South Carolina Atlantic waters out 20 nm until 4 am, and for the Georgia waters beyond 20 nm until 7 am. W winds will reach as high as 25-30 kt with gusts around 35 kt for several hours. The Charleston Harbor and the Georgia waters within 20 nm will experience solid Small Craft Advisories, with any gusts of gale force to be too infrequent to justify raising a Gale Warning. Seas will range from 3 to 4 feet near the immediate coast to as large as 6 to 8 feet out near 50 to 60 nm off the Georgia shoreline.

Tuesday through Saturday: Small Craft Advisories will be ongoing for all waters, including the Charleston Harbor, at the start of the period. Conditions will stay fairly elevated through much of the day, before vastly improving Wednesday and Thursday as the high pressure axis drifts overhead and cold advection wanes. On 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 this morning for SCZ045. MARINE . Gale Warning until 4 AM EST early this morning for AMZ350-352. Small Craft Advisory until 1 PM EST this afternoon for AMZ330- 354. Gale Warning until 7 AM EST this morning for AMZ374.



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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAXG1 - Sapelo Island Reserve, GA 22 mi92 min W 13 44°F 1016 hPa (+1.0)27°F
FPKG1 - 8670870 - Fort Pulaski, GA 27 mi44 min W 16 G 21 42°F 62°F1015.8 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 29 mi42 min WNW 27 G 33 48°F 68°F6 ft1015 hPa (+1.0)33°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, GA21 mi36 minW 14 G 2110.00 miFair39°F27°F63%1015.2 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA22 mi36 minW 1010.00 miMostly Cloudy40°F28°F62%1015.9 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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1 day agoNE5N5NE3N6N5N7NE5N5NW5N5N4NW4NE4CalmN4CalmCalmSE4CalmSE3S5S10S13S10
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2 days agoCalmCalmN6NE6N3NE5E8NE5NE7NE5NE5E9NE5N5N5N6N4N6N7NE4N3N4N4NE6

Tide / Current Tables for Walburg Creek entrance, Georgia
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Walburg Creek entrance
Click for Map
Tue -- 02:37 AM EST     0.22 feet Low Tide
Tue -- 07:06 AM EST     Sunrise
Tue -- 08:10 AM EST     Moonset
Tue -- 08:35 AM EST     8.00 feet High Tide
Tue -- 03:12 PM EST     0.59 feet Low Tide
Tue -- 05:20 PM EST     Sunset
Tue -- 06:26 PM EST     Moonrise
Tue -- 08:57 PM EST     6.70 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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31.50.40.31.33.15.26.97.87.97.25.94.32.71.30.60.92.13.85.36.36.76.35.3

Tide / Current Tables for Thomas Landing, S. Newport River, Georgia
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Thomas Landing
Click for Map
Tue -- 03:02 AM EST     0.21 feet Low Tide
Tue -- 07:07 AM EST     Sunrise
Tue -- 08:11 AM EST     Moonset
Tue -- 09:16 AM EST     8.24 feet High Tide
Tue -- 03:37 PM EST     0.56 feet Low Tide
Tue -- 05:21 PM EST     Sunset
Tue -- 06:26 PM EST     Moonrise
Tue -- 09:38 PM EST     6.89 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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42.30.80.20.72.24.26.17.58.286.95.43.61.90.80.61.534.65.96.76.86.2

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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weather_mapweather_map weather_map


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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.