Thursday, April2, 2020
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Marine Weather and Tides
Tybee 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 3:00 PM EDT (19:00 UTC) Moonrise 12:47PMMoonset 2:24AM Illumination 73% 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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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 131 Pm Edt Thu Apr 2 2020
This afternoon..N winds 10 kt. Seas 2 ft.
Tonight..NW winds 5 to 10 kt. Seas 2 ft.
Fri..N winds 10 to 15 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 ft.
Fri night..W winds 5 to 10 kt, becoming nw after midnight. Seas 2 ft in the evening, then seas 1 foot.
Sat..NE winds 10 to 15 kt. Seas 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 to 15 kt. Seas 2 to 3 ft. A slight chance of showers.
AMZ300 131 Pm 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 Tybee Island city, GA
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location: 32.03, -80.85     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 021733 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 133 PM 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 /THROUGH TONIGHT/. Early this afternoon: No change to the going forecast. Previous discussion continues below.

Late this morning: A very quiet quiet and comfortable day on tap across southeast South Carolina and southeast Georgia. North to south oriented high pressure centered north of the Great Lakes will continue to extend into the forecast area. This setup will continue to drive north to northwest flow across the forecast area, but the gradient will be much more relaxed so overall wind speeds will be less than yesterday. More importantly, we have lost the plentiful low level moisture and the influence of the trough aloft so we are currently under clear skies. With unabated insolation, temperatures will be warmer than Wednesday. The KCHS 12z sounding recorded a 1000-850 mb thickness of 1335 which would give a high around 68. With weak downslope flow, we continue to think we will overperform this a bit. The forecast features 68-70 around the Tri-County, and roughly 70-73 across southeast Georgia.

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.

SHORT TERM /FRIDAY THROUGH SUNDAY/. 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 THURSDAY/. 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 /18Z THURSDAY THROUGH TUESDAY/. VFR conditions will prevail at KCHS and KSAV through 18z Friday.

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.



NEAR TERM . BSH/ST SHORT TERM . ETM LONG TERM . ETM AVIATION . BSH/ETM MARINE . ST/ETM TIDES/COASTAL FLOODING .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 3 mi252 min NE 7 G 9.9 58°F 65°F1019.1 hPa
41033 29 mi232 min N 9.7 G 16 57°F 65°F1018.1 hPa
ACXS1 - ACE Basin Reserve, SC 42 mi315 min N 4.1 56°F 1019 hPa42°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 44 mi250 min NNE 14 G 16 60°F 67°F3 ft1017.8 hPa (+1.4)50°F
SAXG1 - Sapelo Island Reserve, GA 48 mi300 min NNE 7 64°F 1018 hPa (+2.0)51°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilton Head Island, Hilton Head Airport, SC15 mi70 minNNE 1210.00 miA Few Clouds64°F41°F43%1017.3 hPa
Hunter U. S. Army Airfield, GA16 mi2.1 hrsNW 610.00 miFair67°F41°F40%1016.9 hPa
Savannah-Hilton Head International Airport, GA20 mi67 minNW 6 G 1410.00 miA Few Clouds68°F41°F38%1016.8 hPa

Link to 5 minute data for KHXD

Wind History from HXD (wind in knots)
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N9N8N4NE4CalmNE6NE5Calm----CalmCalm--N10N12N12N12NE10N7NE9NE12
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2 days agoW8S10SE4S4SW7SW7S55CalmCalm3CalmCalmE3Calm--CalmCalmCalmCalmCalmCalmSE4SE4

Tide / Current Tables for Tybee Light, Savannah River, Georgia
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Tybee Light
Click for Map
Thu -- 03:02 AM EDT     6.80 feet High Tide
Thu -- 03:24 AM EDT     Moonset
Thu -- 07:09 AM EDT     Sunrise
Thu -- 09:37 AM EDT     0.99 feet Low Tide
Thu -- 01:47 PM EDT     Moonrise
Thu -- 03:40 PM EDT     5.95 feet High Tide
Thu -- 07:44 PM EDT     Sunset
Thu -- 10:01 PM EDT     0.61 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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45.46.46.86.55.54.231.91.111.72.845.15.85.95.44.43.2210.61

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 (15,3,4,5)
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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.