Saturday, August8, 2020
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Marine Weather and Tides
Port Wentworth, 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 6:43AMSunset 8:16PM Saturday August 8, 2020 8:14 AM EDT (12:14 UTC) Moonrise 10:23PMMoonset 10:11AM Illumination 80% Phase: Waning Gibbous; Moon at 19 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- 708 Am Edt Sat Aug 8 2020
Today..SW winds 5 kt, becoming S 10 to 15 kt. Seas 2 ft. A slight chance of showers and tstms.
Tonight..S winds 10 to 15 kt. Seas 2 ft. A slight chance of showers and tstms.
Sun..SW winds 5 to 10 kt, becoming S in the afternoon. Seas 2 ft. A chance of showers and tstms.
Sun night..SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Mon..SW winds 5 kt. Seas 2 ft. A chance of showers and tstms.
Mon night..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Tue..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Tue night..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Wed..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Wed night..S winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 708 Am Edt Sat Aug 8 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A stationary front will linger to the west through the weekend before dissipating. The region will then be positioned between atlantic high pressure centered offshore and an inland area of broad low pressure.


7 Day Forecast for Marine Location Near Port Wentworth, GA
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location: 32.17, -81.13     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 081104 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 704 AM EDT Sat Aug 8 2020

SYNOPSIS. A stationary front will linger to the west through the weekend before dissipating. The region will then be positioned between Atlantic high pressure centered offshore and an inland area of broad low pressure.

NEAR TERM /UNTIL 6 PM THIS EVENING/. This morning, isolated showers/thunderstorms could develop/dissipate along mesoscale boundaries just about anywhere across the region, especially along/east of I-95. However, guidance suggests that most diurnal showers/thunderstorms could hold off until mid to late afternoon, as the sea breeze pushes inland and subsequent outflow boundaries develop. Capped maximum PoPS at 40-50 percent inland, but locally greater PoPs could eventually be required. PWAT values around 2 inches, light steering flow and typically strong instability could support locally heavy rainfall and isolated/pulse episodes of damaging wind gusts this afternoon.

Outside thunderstorms, high temperatures in the lower/middle 90s will be common away from the beaches, and heat index values will once again push into the 100-108F range at many locations.

SHORT TERM /6 PM THIS EVENING THROUGH TUESDAY/. Tonight: Guidance suggests that showers/thunderstorms with locally heavy rainfall and even an isolated threat for brief damaging wind gusts could persist well into the evening. Overnight, the focus for convection should once again shift from inland counties toward the coast, especially the SC coast and adjacent coastal waters. Low temperatures should again range from the lower to middle 70s inland to the upper 70s/lower 80s at the coast.

All models show that the region will remain between Atlantic high pressure well to the east-southeast and deep layer troughing well inland. Expect a rather typical diurnal pattern of scattered to numerous mainly afternoon and evening showers and thunderstorms each day, driven mostly by the afternoon sea breeze, and then outflow boundaries later in the afternoon and evening. Have kept high end chance to low end likely PoPs. Relatively light, unidirectional winds and PWs near 2 inches, could produce some training of convection, providing the potential for locally heavy rainfall each day. Highs near to slightly above normal in the lower to mid 90s, warmest well inland. Lows in the lower 70s well inland and mid to upper 70s else where.

LONG TERM /TUESDAY NIGHT THROUGH FRIDAY/. Little change in the large scale pattern, with a deep layer Atlantic ridge situated to the east and deep layer trough of low pressure well to the west. Global models show that an upper trough may try to sharpen well to the west during this period, as well as an increase in deep layer moisture. With this combination, guidance continues to show likely afternoon/early evening PoPs each day. A little uncomfortable going with such high PoPs this far out, but blended PoPs have been consistently high, and those PoPs collaborate well with surrounding offices. Highs will continue near normal, around 90 to the lower 90s. Lows in the lower to mid 70s.

AVIATION /12Z SATURDAY THROUGH WEDNESDAY/. Until 13-14z, stratus will occasionally produce cigs at or below 500 ft agl at KSAV. Also, brief MVFR cigs are possible at KCHS this morning. Also, isolated showers could develop around the terminals this morning, but latest guidance suggests a better chance for thunderstorms at both terminals between 20-21z and 02-04z. Thus, included VCTS/CBs during that period. Occasional MVFR/IFR ceilings are possible late tonight night/early Sunday.

Extended Aviation Outlook: Expect Scattered to possibly numerous showers and thunderstorms, mainly afternoon and evening each day, which may cause brief flight restrictions. There is still a chance for late night Atlantic based stratocu, mainly at KCHS.

MARINE. Today and tonight: While and isolated waterspout cannot be ruled out near the coast this morning, lack of a well-defined surface boundary should limit this potential. Otherwise, light W/SW winds this morning will become S/SE at 10 to 15 knots as the sea breeze develops midday and persist into early evening. Then, S/SW winds will average 5-15 kt tonight, perhaps turning offshore at less than 10 kt if the land breeze again pushes into nearshore waters late. Farther offshore, S/SW winds will average 10-15 kt through tonight. seas will average around 2 feet.

No highlights expected through the period. A very persistent summer- time pattern is expected to remain in place with an Atlantic ridge to the east and lower pressure well inland. This will result in light southerly winds of 15 knots or less and seas 1 to 3 feet, highest offshore. Winds will likely become onshore each afternoon near the coast. Scattered mainly night time and morning showers and thunderstorms.

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

NEAR TERM . SPR SHORT TERM . RFM LONG TERM . RFM AVIATION . RFM/SPR MARINE . RFM/SPR


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 15 mi57 min SW 2.9 G 4.1 76°F 85°F1021 hPa
41033 39 mi67 min W 5.8 G 7.8 82°F 85°F1020 hPa
ACXS1 - ACE Basin Reserve, SC 45 mi90 min Calm 75°F 1020 hPa74°F
SAXG1 - Sapelo Island Reserve, GA 53 mi75 min WSW 6 76°F 1020 hPa (+1.0)72°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Savannah-Hilton Head International Airport, GA4 mi22 minN 010.00 miOvercast75°F73°F96%1021 hPa
Hunter U. S. Army Airfield, GA10 mi19 minWSW 410.00 miA Few Clouds75°F71°F90%1020.3 hPa
Hilton Head Island, Hilton Head Airport, SC23 mi25 minN 010.00 miFair77°F73°F89%1021 hPa

Link to 5 minute data for KSAV

Wind History from SAV (wind in knots)
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Last 24hrW5W3CalmSE43SW5SE10S11S7SW6SW8S5SE4SE4CalmSW5W4W6S3SW5S4SW4W3Calm
1 day agoSW43CalmW36SW7SW7S13NE10N12
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SE11W9CalmSE3N4CalmNE3CalmCalmCalmCalmCalmCalm
2 days agoCalmCalmSW4SE5S6S7S7S11S11SE10SE11SE7S6CalmN3CalmS7S5CalmCalmSW3SW4S4S5

Tide / Current Tables for Little Back River, Hwy. 17, Back River., Savannah River, South Carolina
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Little Back River
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Sat -- 01:04 AM EDT     7.60 feet High Tide
Sat -- 06:44 AM EDT     Sunrise
Sat -- 07:37 AM EDT     0.55 feet Low Tide
Sat -- 11:10 AM EDT     Moonset
Sat -- 01:20 PM EDT     7.29 feet High Tide
Sat -- 07:46 PM EDT     1.32 feet Low Tide
Sat -- 08:14 PM EDT     Sunset
Sat -- 11:22 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.27.67.46.65.13.41.80.80.61.73.55.36.67.37.26.55.33.82.51.61.32.13.55.1

Tide / Current Tables for Savannah River Entrance, Georgia Current (2) (expired 1999-12-31)
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Savannah River Entrance
Click for Map
Sat -- 12:28 AM EDT     -0.00 knots Slack
Sat -- 04:18 AM EDT     -2.44 knots Max Ebb
Sat -- 06:43 AM EDT     Sunrise
Sat -- 07:46 AM EDT     0.00 knots Slack
Sat -- 10:00 AM EDT     1.40 knots Max Flood
Sat -- 11:09 AM EDT     Moonset
Sat -- 12:57 PM EDT     -0.00 knots Slack
Sat -- 04:40 PM EDT     -2.20 knots Max Ebb
Sat -- 08:03 PM EDT     0.00 knots Slack
Sat -- 08:13 PM EDT     Sunset
Sat -- 10:16 PM EDT     1.34 knots Max Flood
Sat -- 11:21 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.3-0.4-1.2-2-2.4-2.3-1.7-0.80.21.11.41.10.6-0-0.7-1.5-2.1-2.2-1.8-1-00.81.31.2

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (8,2,3,4)
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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.