Thursday, April2, 2020
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Marine Weather and Tides
Dutch Island, GA

Version 3.4
NOTICE
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 7:08AMSunset 7:45PM Thursday April 2, 2020 6:33 AM EDT (10:33 UTC) Moonrise 12:48PMMoonset 2:24AM Illumination 69% Phase: Waxing Gibbous; Moon at 9 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- 600 Am Edt Thu Apr 2 2020
Today..N winds 10 kt, diminishing to 5 kt. Seas 1 to 2 ft.
Tonight..W winds 5 to 10 kt, becoming N after midnight. Seas 1 to 2 ft.
Fri..N winds 5 to 10 kt. Seas 1 to 2 ft.
Fri night..SW winds 5 to 10 kt, becoming W after midnight. Seas 1 to 2 ft.
Sat..NE winds 10 kt. Seas 1 to 2 ft.
Sat night..E winds 5 to 10 kt. Seas 2 to 3 ft.
Sun..SE winds 5 to 10 kt. Seas 2 to 3 ft.
Sun night..S winds 5 to 10 kt. Seas 2 to 3 ft.
Mon..S winds 5 to 10 kt. Seas 2 to 3 ft.
Mon night..S winds 10 kt. Seas 2 to 3 ft.
AMZ300 600 Am Edt Thu Apr 2 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail into early next week. A cold front will approach the region towards the middle of next week.


7 Day Forecast for Marine Location Near Dutch Island, GA
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location: 31.98, -81.01     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 021001 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 601 AM EDT Thu Apr 2 2020

SYNOPSIS. High pressure will prevail into early next week. A cold front will approach the region towards the middle of next week.

NEAR TERM /UNTIL 6 PM THIS EVENING/. No major changes were made for the sunrise update.

Elongated high pressure will hold its influence on the region today as a high amplitude upper ridge extending from the Gulf of Mexico north to near Hudson Bay slowly propagates east. The combination of strong insolation, downslope flow, and a modest rise in H8 temperatures to around 4-6C during peak heating will support highs within a degree or so of 70. This is well supported by modified forecast soundings, full sun low-level thickness schemes and the various 02/00z statistical guidance packages. Offshore winds will mostly preclude the formation of a sea breeze circulation this afternoon although several high resolution data sets suggest a very weak circulation may try and develop along parts of the Liberty County and McIntosh County coasts late. These offshore winds should bring relatively warm temperatures all the way the coast with only the immediate beach front likely to be more heavily influenced by the cooler Atlantic waters.

SHORT TERM /6 PM THIS EVENING THROUGH SUNDAY/. Tonight: The synoptic pattern will change little with high pressure remaining anchored over the area. The boundary layer will decouple by mid-evening result in a calm/light wind field. The combination of clear skies and calm/light winds will yield strong radiational cooling and low end of the guidance envelop was utilized to construct low temperatures Friday morning. Some high clouds associated with a west-east oriented jet streak propagating along the Gulf Coast could work into areas south of the I-16 corridor right around daybreak, but this should not have an influence on overnight lows. Lows will range from the lower-mid 40s inland with upper 40s/lower 50s at the coast with lower-mid 50s at the beaches. There could be a few lower 40s in some of the normally cooler more sheltered areas such as the Francis Marion National Forecast.

Friday through Sunday: High pressure will prevail through the period. The ridge axis will stay west of the area Friday into Saturday, before slowly shifting into the Atlantic later in the weekend. The weather will be quite pleasant with dry conditions and low humidity values. Developing return flow on Sunday will bring moisture levels up a bit, but will bring no more than an increase in cloud cover. Temperatures will be seasonable.

LONG TERM /SUNDAY NIGHT THROUGH WEDNESDAY/. Atlantic high pressure will be the dominant feature on Monday, with a dry forecast to continue. High pressure will then weaken as low pressure and an associated cold front moves into the eastern U.S. towards the middle of the week. Differences exist between model solutions regarding details, but moisture will increase and a stream of shortwave energy is progged to pass through, so rain chances will return. PoPs are held in the chance range. Temperatures will be above normal through the period.

AVIATION /10Z THURSDAY THROUGH MONDAY/. VFR. Winds could get a little gusty during peak heating, but no major impacts are expected.

Extended Aviation Outlook: VFR is expected to prevail into early next week.

MARINE. Through Tonight: There are no concerns. A northwest wind regime will dominate with high pressure centered to the west. There are signs that an ill-defined sea breeze circulation could form along the middle and southern Georgia coast later this afternoon resulting in a weak, somewhat chaotic wind field over the Georgia nearshore leg. Otherwise, winds will average 10 kt or less today with 10-15 kt tonight. Seas will range from 1-2 ft nearshore waters and 2-4 ft over the Georgia offshore waters through tonight. A period of 4-5 ft seas are expected to impact the far eastern portions of the Georgia offshore leg (mainly 50-60 NM) through this afternoon.

Friday through Tuesday: High pressure will prevail into early next week. Winds will gradually become more onshore through the weekend as the ridge axis slides into the Atlantic. Conditions are expected to stay below Small Craft Advisory criteria, although 6 foot seas could enter the far outer portions of the Outer Georgia waters late weekend.

TIDES/COASTAL FLOODING. Elevated tide levels are expected next week due to astronomical influences from the upcoming full moon and lunar perigee. Minor saltwater flooding will be possible around the times of high tide, especially each evening.

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




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 7 mi64 min N 8.9 G 11 56°F 65°F1016 hPa
41033 38 mi86 min N 7.8 G 9.7 60°F 65°F1014.6 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 41 mi44 min N 3.9 G 3.9 62°F 67°F3 ft1015 hPa (+0.4)45°F
SAXG1 - Sapelo Island Reserve, GA 42 mi94 min NNW 4.1 56°F 1015 hPa (+0.0)52°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, GA8 mi38 minN 610.00 miFair51°F47°F86%1015.5 hPa
Savannah-Hilton Head International Airport, GA15 mi41 minN 710.00 miPartly Cloudy50°F46°F86%1016.3 hPa
Hilton Head Island, Hilton Head Airport, SC23 mi59 minN 310.00 miFair48°F46°F94%1016.3 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hrNW9NW9NW10NW11N14
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N11NW11NW8N10NW9N10N5CalmCalmCalmCalmCalmCalmCalmCalmNW3N6
1 day agoN4W4W3CalmSE6S5S9SW8S5SE7SW7S10SW8--NW12NW11
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2 days agoCalmW3NW5NW9NW8NW7NW4NW5W3NW10W6W6NW7W3W3CalmCalmW4S3CalmCalmCalmCalmNW4

Tide / Current Tables for Savannah Sheraton Resort Hotel, Wilmington River, Georgia
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Savannah Sheraton Resort Hotel
Click for Map
Thu -- 03:24 AM EDT     Moonset
Thu -- 03:26 AM EDT     7.76 feet High Tide
Thu -- 07:10 AM EDT     Sunrise
Thu -- 09:56 AM EDT     1.14 feet Low Tide
Thu -- 01:47 PM EDT     Moonrise
Thu -- 04:04 PM EDT     6.79 feet High Tide
Thu -- 07:44 PM EDT     Sunset
Thu -- 10:19 PM EDT     0.70 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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45.777.77.66.85.43.92.51.51.11.62.74.15.46.46.86.55.54.12.71.50.80.9

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Thu -- 01:07 AM EDT     1.91 knots Max Flood
Thu -- 03:24 AM EDT     Moonset
Thu -- 04:49 AM EDT     -0.00 knots Slack
Thu -- 07:09 AM EDT     Sunrise
Thu -- 07:35 AM EDT     -1.67 knots Max Ebb
Thu -- 11:18 AM EDT     0.00 knots Slack
Thu -- 01:41 PM EDT     1.41 knots Max Flood
Thu -- 01:47 PM EDT     Moonrise
Thu -- 05:16 PM EDT     -0.00 knots Slack
Thu -- 07:44 PM EDT     Sunset
Thu -- 08:01 PM EDT     -1.45 knots Max Ebb
Thu -- 11:21 PM EDT     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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1.51.91.71.20.6-0.2-1.1-1.6-1.6-1.5-1.1-0.30.61.31.41.10.70.2-0.6-1.2-1.5-1.4-1.1-0.4

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (6,6,7,8)
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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.