Wednesday, April1, 2020
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Marine Weather and Tides
Henderson, 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 7:11AMSunset 7:46PM Wednesday April 1, 2020 3:39 AM EDT (07:39 UTC) Moonrise 11:49AMMoonset 1:32AM Illumination 58% Phase: First Quarter Moon; Moon at 8 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- 315 Am Edt Wed Apr 1 2020
.small craft advisory in effect until 11 am edt this morning...
Today..NW winds 15 to 20 kt with gusts to 25 kt, diminishing to 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft, except 2 to 3 ft near the coast, subsiding to 1 to 2 ft throughout.
Tonight..N winds 10 kt. Seas 1 to 2 ft.
Thu..N winds 10 to 15 kt, becoming ne 5 to 10 kt in the afternoon. Seas 2 to 3 ft.
Thu night..SW winds 5 kt, becoming N after midnight. Seas 2 ft.
Fri..N winds 5 to 10 kt, becoming ne in the afternoon. Seas 2 ft.
Fri night..S winds 5 kt, becoming W after midnight. Seas 2 ft.
Sat..NE winds 5 to 10 kt. Seas 2 ft.
Sat night..SE 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.
AMZ300 315 Am Edt Wed Apr 1 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail into early next week. A weakening front will approach the region during the early to middle of next week.


7 Day Forecast for Marine Location Near Henderson, GA
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location: 32.03, -81.22     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 010726 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 326 AM EDT Wed Apr 1 2020

SYNOPSIS. High pressure will prevail into early next week. A weakening front will approach the region during the early to middle of next week.

NEAR TERM /THROUGH TODAY/. A broad, cyclonic flow will dominate the region today as deepening low pressure pushes farther out into the Atlantic and high pressure holds to the west. Although a few sprinkles could linger near the Savannah River for the next 1-2 hours, dry conditions will prevail as PWATS drop and low-level moisture scours out. Wrap around low-clouds will be slow to mix out this morning as pure downslope trajectories look to not take hold until this afternoon. A good bit of sun should gradually develop through the day, first near the Altamaha River, then gradually working north as 925-850 hPa winds slowly back to the northwest. Highs will range from the mid 60s across the Charleston Tri- County area (where clouds will be the slowest to mix out) to 70-71 degrees across the far south in the Hinesville-Ludowici- Darien corridor. Gusty winds will linger through at least late morning then begin to subside this afternoon as the pressure gradient between the low pressure well offshore and high pressure to the west begins to relax.

SHORT TERM /TONIGHT THROUGH SATURDAY/. Tonight: Quiet weather will dominate as upper-level ridging begins to take hold and surface high pressure prevails. Any lingering cloud cover will quickly dissipate after sunset with the loss of heating. There should be enough of lingering pressure gradient to keep winds slightly elevated during the early evening before slowly diminishing through the night (especially interior Southeast Georgia) as the surface high draws closer. Generally favored the cooler side of guidance with lows ranging from the lower-mid 40s inland to the upper 40s at the coast with lower 50s at the beaches.

Thursday through Saturday: High pressure will remain the dominant feature into the weekend. The N-S oriented ridge axis will be west of the area through Friday, then slowly begin to shift into the Atlantic on Saturday. Quiet and dry conditions will persist with large scale subsidence and little moisture in place. Plenty of sunshine is expected, although a bit more cloud cover is anticipated on Saturday. It will feel quite pleasant with temperatures within a few degrees of normal each afternoon and low humidity values. Low temperatures will be coolest Thursday night in the mid to upper 40s, then moderate to around 50/low 50s Friday night.

LONG TERM /SATURDAY NIGHT THROUGH TUESDAY/. Surface high pressure will remain in control through early next week. Models show a weak front approaching the region, however it appears to stall and/or dissipate before reaching the forecast area. Dry conditions are expected on Sunday and possibly Monday, then rain chances will return as moisture increases and shortwave energy passes through. Temperatures through the period will be above normal as heights build aloft.

AVIATION /07Z WEDNESDAY THROUGH SUNDAY/. Considerable wrap around moisture will remain over the terminals this morning. Cigs will largely remain MVFR through late morning at KCHS with a occasional IFR cigs occurring through about 09z. VFR cigs will prevail at KSAV, although bouts of MVFR can not be completely ruled over over the next few hours. Gusty winds will occur with gusts near 20 kt. The gustiness will begin to subside by late morning at both terminals as high pressure builds in and the pressure gradient begins to relax.

Extended Aviation Outlook: VFR is expected to prevail through the weekend.

MARINE. Today: Gusty northwest winds will gradually diminish today as low pressure pulls away from the region and high pressure builds east. Frequent gusts to 25 kt will occur across all waters this morning and a Small Craft Advisory continues, including Charleston Harbor. By this afternoon, winds will average 10-15 kt. Seas 2-4 ft nearshore waters and 4-6 ft offshore waters will subside to 1-3 ft nearshore waters and 3-4 ft offshore waters this afternoon.

Tonight: There are no concerns with high pressure holding to the west. North winds will average 10-15 kt with seas 1-3 ft nearshore waters and 3-4 ft offshore waters.

Thursday through Monday: High pressure will be the primary feature late week into early next week. There will be a brief wind surge Thursday night across the Charleston county waters, but conditions will remain below Small Craft Advisory criteria. The only other time period of concern will be Saturday night into Sunday when 6 foot seas could build into the outer Georgia waters.

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 time of the evening high tides, starting as early as Tuesday.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . Small Craft Advisory until 11 AM EDT this morning for AMZ330- 352-354. Small Craft Advisory until 2 PM EDT this afternoon for AMZ350- 374.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 17 mi51 min NW 22 G 29 59°F 66°F1005 hPa
SAXG1 - Sapelo Island Reserve, GA 42 mi39 min NW 18 59°F 1006 hPa (+2.0)49°F
41033 46 mi31 min WNW 19 G 25 59°F 1003.2 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 47 mi49 min WNW 25 G 31 62°F 67°F4 ft1003.7 hPa (+0.4)54°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, GA4 mi43 minNW 14 G 2110.00 miLight Rain59°F50°F75%1004.7 hPa
Savannah-Hilton Head International Airport, GA8 mi46 minNW 18 G 2710.00 miOvercast and Breezy59°F50°F72%1005.3 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA21 mi43 minWNW 12 G 174.00 miOvercast with Haze56°F46°F70%1005.7 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hrCalmCalmNW4N4W4W3CalmSE6S5S9SW8S5SE7SW7S10SW8--NW12NW11
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1 day agoW4W3W3CalmW3NW5NW9NW8NW7NW4NW5W3NW10W6W6NW7W3W3CalmCalmW4S3CalmCalm
2 days agoS5SW3SW3SW4SW3SW5W9W8S9SW6SW9SW10SW10SW9SW8SW6SW4S6SW5SW5SW3SW5SW6W6

Tide / Current Tables for Highway bridge, Ogeechee River, Georgia
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Highway bridge
Click for Map
Wed -- 12:19 AM EDT     0.12 feet Low Tide
Wed -- 02:31 AM EDT     Moonset
Wed -- 05:29 AM EDT     1.02 feet High Tide
Wed -- 06:21 AM EDT     First Quarter
Wed -- 07:12 AM EDT     Sunrise
Wed -- 12:48 PM EDT     Moonrise
Wed -- 01:04 PM EDT     0.16 feet Low Tide
Wed -- 06:05 PM EDT     0.87 feet High Tide
Wed -- 07:45 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.20.30.60.9110.90.80.60.40.30.20.20.20.40.60.80.90.80.70.60.50.3

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Wed -- 12:06 AM EDT     1.83 knots Max Flood
Wed -- 02:30 AM EDT     Moonset
Wed -- 03:47 AM EDT     -0.00 knots Slack
Wed -- 06:21 AM EDT     First Quarter
Wed -- 06:27 AM EDT     -1.61 knots Max Ebb
Wed -- 07:11 AM EDT     Sunrise
Wed -- 10:17 AM EDT     0.00 knots Slack
Wed -- 12:40 PM EDT     1.29 knots Max Flood
Wed -- 12:47 PM EDT     Moonrise
Wed -- 04:14 PM EDT     -0.00 knots Slack
Wed -- 06:50 PM EDT     -1.36 knots Max Ebb
Wed -- 07:43 PM EDT     Sunset
Wed -- 10:17 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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1.81.61.10.5-0.2-1-1.6-1.6-1.3-0.9-0.30.61.21.310.60.1-0.5-1.2-1.4-1.2-0.9-0.30.7

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
Wind Forecast for Charleston, SC (3,6,7,8)
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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.