Wednesday, July15, 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 6:28AMSunset 8:33PM Wednesday July 15, 2020 10:04 PM EDT (02:04 UTC) Moonrise 1:23AMMoonset 3:05PM Illumination 19% Phase: Waning Crescent; Moon at 25 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- 951 Pm Edt Wed Jul 15 2020
Rest of tonight..SE winds 5 to 10 kt. Seas 2 ft.
Thu..E winds 5 to 10 kt. Seas 2 ft.
Thu night..E 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 in the evening.
Sat..SE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Sat night..S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms in the evening.
Sun..S winds 5 to 10 kt. Seas 2 ft.
Sun night..S winds 5 to 10 kt. Seas 2 ft.
Mon..S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Mon night..S winds 10 to 15 kt. Seas 2 ft. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 951 Pm Edt Wed Jul 15 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Atlantic high pressure should prevail through early 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 152252 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 652 PM EDT Wed Jul 15 2020

SYNOPSIS. Atlantic high pressure should prevail through early next week.

NEAR TERM /UNTIL 6 AM THURSDAY MORNING/. Evening Update: Overall, the outflow boundaries are moving out of the area and the SPC mesoanalysis shows CIN values of -25 to -75 across the forecast area. As a result, visible satellite shows a lack of cumulus clouds, deep convection is no longer expected in these areas. Only minor changes were made to the forecast. Initialized temps/dewpoints and adjusted to current trends, lowering temps a degree or two in places that saw more showers.

Previous Discussion: Surface high pressure will expand southward from New England tonight. Aloft, mid level ridging will persist. Lingering convection will diminish this evening with loss of solar insolation, with a dry forecast in place for the overnight. Could not rule out some shallow ground fog across interior Georgia counties late tonight/towards daybreak, but no impacts are expected. Low temperatures are expected to range from the low 70s inland to upper 70s/near 80 at the immediate coast.

SHORT TERM /6 AM THURSDAY MORNING THROUGH SATURDAY/. Moderate to high confidence this period. Deep high pressure will generally prevail with mainly hot and humid conditions continuing. The onshore flow will limit high temperatures closer to the coast but inland areas should still reach the mid to possibly even upper 90s. Rain chances look minimal, mainly confined to the afternoon/early evening each day as the sea breeze progresses inland. Temperatures should be at or above normal through the period.

LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/. A mid/upper level ridge of high pressure will persist across the Southeast through at least the weekend with the bulk of shortwave energy passing north of the area within a broad zonal flow. A more typical summertime pattern is anticipated with few to scattered showers/thunderstorms possible Sunday afternoon/evening. Precip coverage should then slightly increase early next week as weak h5 shortwave energy enters the area while an onshore sfc flow persists between sfc high pressure extending across the western Atlantic and lee trough inland. Greatest precip coverage should occur during the middle of next week as h5 shortwave energy persists along a base of a broad trough of low pressure. High temps will be a few degrees above normal to start off the week (low/mid 90s), but should be a degree or two cooler heading into the middle of 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 /00Z THURSDAY THROUGH MONDAY/. VFR is expected to prevail through 00Z Thursday. For the overnight, there is some hint at fog coverage, but impacts are expected to be limited at this time. The chance for a direct impact from any shower/thunderstorm is too low to include mention in the TAF.

Extended Aviation Outlook: Moderate to high confidence in mostly VFR conditions at KCHS/KSAV through Sunday with a small risk of mainly brief restrictions each day mainly from afternoon/evening showers and thunderstorms and early morning fog/stratus. On Monday there could be a higher threat for showers/storms as the upper ridge tries to weaken.

MARINE. Tonight: Rather benign marine conditions expected tonight. East to southeast winds will prevail with speeds averaging 10 knots or less. Seas will be around 2 feet.

Thursday through Monday: Moderate to high confidence in a fairly typical summertime pattern as Atlantic high pressure prevails. Winds will mostly be 15 kt or less with seas mostly 3 ft or less.

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

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 17 mi94 min 86°F
SAXG1 - Sapelo Island Reserve, GA 42 mi64 min SSE 5.1 84°F 1018 hPa (+1.0)78°F
41033 46 mi56 min S 9.7 G 16 86°F 85°F1017.6 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 47 mi74 min SSE 12 G 14 85°F 86°F2 ft1017.5 hPa (+1.0)77°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 mi68 minSE 710.00 miFair84°F77°F80%1017.3 hPa
Savannah-Hilton Head International Airport, GA8 mi71 minS 710.00 miPartly Cloudy85°F79°F82%1018 hPa
Wright Army Airfield (Fort Stewart)/Midcoast Regional Airport, GA21 mi2.1 hrsESE 510.00 miMostly Cloudy84°F77°F82%1017.2 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hrS6S5S3CalmS4S4CalmCalmCalmCalmCalmS5CalmE8S3E8E6E8S8
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1 day agoCalmCalmCalmCalmW6W4W5CalmCalmW3W6NW6NW7NW8W7W6CalmNW8W9
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2 days agoS5S6S5S6S4S4S5SW5S3SW4W5W7W7SW5SW9S10S11
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Tide / Current Tables for Highway bridge, Ogeechee River, Georgia
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Highway bridge
Click for Map
Wed -- 02:22 AM EDT     Moonrise
Wed -- 02:51 AM EDT     0.21 feet Low Tide
Wed -- 06:30 AM EDT     Sunrise
Wed -- 07:41 AM EDT     0.88 feet High Tide
Wed -- 03:01 PM EDT     0.09 feet Low Tide
Wed -- 04:04 PM EDT     Moonset
Wed -- 08:09 PM EDT     1.02 feet High Tide
Wed -- 08:31 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.30.20.20.30.50.70.80.90.80.70.60.40.20.10.10.20.40.70.9110.90.8

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Wed -- 02:00 AM EDT     1.42 knots Max Flood
Wed -- 02:21 AM EDT     Moonrise
Wed -- 05:30 AM EDT     -0.00 knots Slack
Wed -- 06:28 AM EDT     Sunrise
Wed -- 08:14 AM EDT     -1.40 knots Max Ebb
Wed -- 11:36 AM EDT     0.00 knots Slack
Wed -- 02:18 PM EDT     1.95 knots Max Flood
Wed -- 04:03 PM EDT     Moonset
Wed -- 05:55 PM EDT     -0.00 knots Slack
Wed -- 08:30 PM EDT     Sunset
Wed -- 08:48 PM EDT     -1.59 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.41.21.41.20.90.4-0.4-1.1-1.4-1.4-1.2-0.60.41.41.91.81.30.7-0.1-1-1.5-1.6-1.5-1.2

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 (22,6,7,8)
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Ground Weather Radar Station Charleston, SC
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weather_mapweather_map weather_map

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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.