Tuesday, July14, 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 6:27AMSunset 8:32PM Tuesday July 14, 2020 3:44 AM EDT (07:44 UTC) Moonrise 12:51AMMoonset 2:07PM Illumination 36% Phase: Waning Crescent; Moon at 24 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- 337 Am Edt Tue Jul 14 2020
Today..W winds 5 kt, becoming S 10 kt this afternoon. Seas 2 ft.
Tonight..SW winds 5 to 10 kt. Seas 2 ft.
Wed..W winds 5 kt, becoming se in the afternoon. Seas 2 ft.
Wed night..SE winds 5 to 10 kt. Seas 2 ft.
Thu..E winds 5 to 10 kt. Seas 2 ft.
Thu night..SE winds 5 to 10 kt. Seas 2 ft.
Fri..E winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Fri night..SE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Sat..SE winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Sat night..S winds 5 to 10 kt. Seas 2 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 337 Am Edt Tue Jul 14 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A weak front linger in the vicinity through Wednesday. The front is expected to dissipate by Thursday, before high pressure prevails across the southeast into early 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 140518 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 118 AM EDT Tue Jul 14 2020

SYNOPSIS. A weak front will drift into the area tonight and linger in the vicinity through Wednesday. The front is expected to dissipate by Thursday and high pressure will persist across the Southeast into early next week.

NEAR TERM /UNTIL 6 AM THIS MORNING/. Removed all POPs on this update and adjusted for cool outflow air over the Charleston Tri-County area, both for hourly trends and lows. Made a few other minor adjustments downward of dewpoints in the rain cooled air. Otherwise previous forecast maintained.

There could be some fog where it rained earlier, but no signals for anything significant. Thus we have not included in the forecast.Lows from the lower 70s in the north and west to the upper 70s along the coast from Charleston southward.

SHORT TERM /6 AM THIS MORNING THROUGH THURSDAY/. Tuesday through Thursday: Overall, the pattern looks very summerlike across the forecast area. Aloft, a weak mid and upper level disturbance is expected to drift southward to the Florida panhandle on Tuesday. Then by Wednesday and Thursday a ridge aloft will take hold and strengthen across Georgia and the Carolinas. A very weak front will drift into the area on Tuesday, linger through Wednesday, and then dissipate by Thursday. Thunderstorm coverage is forecast to be isolated on Tuesday as model soundings show dewpoints mixing out inland in the afternoon. Wednesday will perhaps see the best coverage as the weak front lingers in the area, but still just isolated to scattered. By Thursday, thunderstorms will likely struggle as the ridge continues to build aloft and the surface high becomes more prominent. The forecast features mid to upper 90s for Tuesday and Wednesday, then just a touch cooler for Thursday as onshore flow prevails in the low levels. The severe risk is quite low, but we can never completely discount a strong to marginally severe thunderstorm this time of year.

LONG TERM /THURSDAY NIGHT THROUGH MONDAY/. A mid/upper level ridge of high pressure will extend across the Southeast through much of the week with the bulk of shortwave energy passing north of the area with a series of longwave troughs. A more typical summertime pattern is anticipated with few to scattered showers/thunderstorms possible each afternoon/evening through Friday. Precip coverage should slightly increase late weekend as weak h5 shortwave energy enters the area while onshore sfc flow persists between high pressure extending across the western Atlantic and lee trough inland. High temps will be a few degrees above normal through the week, generally ranging in low/mid 90s each day (warmest inland), but could be a degree or two cooler late week and into early next week as onshore sfc flow remains in place and precip coverage increases. Overnight lows should remain mild, ranging in the mid/upper 70s away from the immediate coast.

AVIATION /06Z TUESDAY THROUGH SATURDAY/. VFR will prevail, although isolated SHRA/TSRA will be around after 18-19Z Tuesday, with the greatest threat of activity at/near KCHS. No need to include any mention at this time due to significant uncertainty.

Extended Aviation Outlook: Low probabilities of direct impacts from thunderstorms at the terminals each day.

MARINE. Tonight: A weak cold front will slip toward the coast of the southeast, as the Atlantic ridge is suppressed over southern Florida. Winds over the Charleston County waters were altered due to earlier convection, but a SW flow has already mostly re- establish itself. As land breeze influences develop late, winds will turn more toward the W. Winds will be no more than 10 or 15 kt throughout. Seas will hold around 2-4 ft, highest north and east waters.

Tuesday through Saturday: South to southwest winds will prevail Tuesday and Wednesday. Then as high pressure takes hold, winds will be more south to southeast into the weekend. Wind speeds will generally top out in the 10-15 knot range with seas no higher than 2 to 3 feet.

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

NEAR TERM . MTE SHORT TERM . BSH LONG TERM . DPB AVIATION . MTE MARINE . MTE


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 7 mi56 min 84°F1013.2 hPa
41033 38 mi36 min W 7.8 G 12 84°F 84°F1012 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 41 mi54 min W 14 G 16 85°F 84°F3 ft1012.1 hPa (-0.6)78°F
SAXG1 - Sapelo Island Reserve, GA 42 mi44 min W 9.9 83°F 1013 hPa (+0.0)76°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 mi48 minW 410.00 miFair76°F70°F83%1012.5 hPa
Savannah-Hilton Head International Airport, GA15 mi51 minWSW 310.00 miFair78°F71°F79%1012.8 hPa
Hilton Head Island, Hilton Head Airport, SC23 mi49 minWNW 49.00 miFair81°F73°F79%1012.9 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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W7W10W9W4W3CalmCalmCalmCalmW6W4
1 day agoW4W3W5CalmCalmCalmS3S3W6NW6SW9W7SW5W6SW6SW8SW4SW4S5S6S5S6S4S4
2 days agoSW3SW4W5W5W6W7NW4W4W5W8NW5W3CalmNW3NW5S10S7S3S6SW4SW3CalmCalmW3

Tide / Current Tables for Savannah Sheraton Resort Hotel, Wilmington River, Georgia
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Savannah Sheraton Resort Hotel
Click for Map
Tue -- 01:50 AM EDT     Moonrise
Tue -- 03:46 AM EDT     6.71 feet High Tide
Tue -- 06:28 AM EDT     Sunrise
Tue -- 09:51 AM EDT     0.87 feet Low Tide
Tue -- 03:07 PM EDT     Moonset
Tue -- 04:15 PM EDT     7.46 feet High Tide
Tue -- 08:31 PM EDT     Sunset
Tue -- 10:32 PM EDT     1.69 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.44.65.76.56.76.14.93.52.21.20.91.42.64.15.66.87.47.26.353.72.51.81.8

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Tue -- 01:10 AM EDT     1.39 knots Max Flood
Tue -- 01:49 AM EDT     Moonrise
Tue -- 04:41 AM EDT     -0.00 knots Slack
Tue -- 06:27 AM EDT     Sunrise
Tue -- 07:23 AM EDT     -1.40 knots Max Ebb
Tue -- 10:48 AM EDT     0.00 knots Slack
Tue -- 01:29 PM EDT     1.88 knots Max Flood
Tue -- 03:06 PM EDT     Moonset
Tue -- 05:05 PM EDT     -0.00 knots Slack
Tue -- 07:49 PM EDT     -1.51 knots Max Ebb
Tue -- 08:30 PM EDT     Sunset
Tue -- 11:34 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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11.41.30.90.5-0.3-1-1.4-1.4-1.2-0.70.21.21.81.81.40.80.1-0.8-1.4-1.5-1.4-1.2-0.5

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 (3,6,7,8)
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Ground Weather Radar Station Charleston, SC
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Disclaimer:
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.