Monday, July6, 2020
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Marine Weather and Tides
Riceboro, 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 6:25AMSunset 8:36PM Monday July 6, 2020 5:15 PM EDT (21:15 UTC) Moonrise 9:08PMMoonset 6:40AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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- 326 Pm Edt Mon Jul 6 2020
Tonight..S winds 10 to 15 kt. Seas 2 ft. Showers and tstms likely this evening, then a chance of showers with a slight chance of tstms after midnight.
Tue..S winds 10 kt. Seas 2 ft. A chance of showers and tstms in the morning, then showers and tstms likely in the afternoon.
Tue night..SW winds 10 to 15 kt. Seas 2 ft. Showers and tstms likely.
Wed..SW winds 10 kt. Seas 2 ft. A chance of showers and tstms in the morning, then showers and tstms likely in the afternoon.
Wed night..W winds 10 kt. Seas 2 ft. Showers and tstms likely, mainly in the evening.
Thu..W winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Thu night..SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Fri..SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Fri night..SW winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Sat..SW winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Sat night..SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 326 Pm Edt Mon Jul 6 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A stationary front will linger over the region through tonight. An area of low pressure is then expected to develop and slowly move across the southeast during the middle part of the week, before lifting north late week into the weekend.


7 Day Forecast for Marine Location Near Riceboro, GA
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location: 31.54, -81.26     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 062003 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 403 PM EDT Mon Jul 6 2020

SYNOPSIS. A stationary front will linger over the region through tonight. An area of low pressure is then expected to develop and slowly move across the Southeast during the middle part of the week, before lifting north late week into the weekend.

NEAR TERM /UNTIL 6 AM TUESDAY MORNING/. This evening and tonight: The band of showers and embedded thunderstorms currently working its way across southeast Georgia will continue to progress to the north and northeast into the evening hours, cross the Savannah River and impacting portions of southeast South Carolina. Overall, the severe threat remains low, though a few storms have produced measured wind gusts in the NWS Jacksonville area of 40-45 mph at times. We could need a few Special Weather Statements but unless updrafts get considerably stronger we don't anticipate much of a severe weather threat. Also, storm motion has been in the 10-15 knot range which is just enough to help keep excessive rain concerns low. The main concern will come from storms that train across the same areas. Overnight, the circulation currently near Albany, GA is expected to continue lifting to the northeast which will bring another band on its east side into the Charleston Tri-County region. This should produce an expansion of showers and embedded thunderstorms beginning in the early morning hours, feeding in from the adjacent coastal waters. After a brief lull in coverage this evening with the loss of diurnal heating, rain chances increase into the 60 percent range for much of the area. Locally heavy rainfall is possible, stretching from the Charleston County coast inland through Colleton and Allendale counties.

SHORT TERM /6 AM TUESDAY MORNING THROUGH THURSDAY/. Tuesday: A stationary front will linger across the region under troughing in the mid-lvls, providing a focus of shower/thunderstorm activity across the area, especially for locations inland across Southeast Georgia and Southeast South Carolina as the center of a low begins shifting north just inland. Deep moisture characterized by PWATs near 2.5 inches along with slow storm motion and modest instability should favor bouts of moderate/heavy rainfall during afternoon/evening hours when maximum diurnal heating is in place and deepest moisture interacts with the sfc low and front. Numerous to widespread showers/thunderstorms should peak in coverage late afternoon into early evening, but scattered to numerous showers/thunderstorms could persist during overnight hours, especially across Southeast South Carolina where lifting mechanisms are more notable through the night. Highs will range in the mid 80s. Lows should remain mild, ranging in the low/mid 70s.

Wednesday: The weather pattern will be quite similar to the previous day with the exception to the position/center of low pressure just inland that gains latitude during the day across Georgia and South Carolina. Deep moisture drawn around the eastern edge of the low center will likely prove to produce another day of numerous to widespread showers/thunderstorms across much of the area, but latest guidance suggests the low to track north, then northeast slightly quicker than previous guidance, suggesting the overall trend of greatest precip activity occurring across Southeast South Carolina and closer to the coast. Again, PWATs near 2.5 inches, slower storm motions and modest instability suggest moderate to heavy rainfall at times (greatest rainfall amounts across the Tri-County area where a few inches of rain are possible).

Wednesday Night through Thursday: A stationary front will remain draped across the region heading into the second half of the week, but the main issue will be associated with an area of low pressure shifting off the Carolina coast. The center of this low should shift off the SC/NC coast beginning Wednesday night and could potentially develop into a tropical cyclone north of the area. At this time, little to no impacts are expected from the low should it develop into a tropical cyclone given the location of development and projected path thereafter to the north-northeast. Precip chances should also be notably less in wake of the low as sfc winds turn more west-northwest across the area. However, scattered to numerous showers and thunderstorms remain in the forecast due to the vicinity of the stalled front, subtle mid-lvl energy aloft and PWATs near 2.25 inches. Precip coverage should follow the typical diurnal curve, peaking during daylight hours. The potential still exists for brief heavy rainfall Thursday afternoon into early evening, but the threat should be less than the previous day. Lows will remain mild Wednesday night, ranging in the low-mid 70s. Highs will be slightly warmer in the west flow Thursday, peaking in the upper 80s to lower 90s.

LONG TERM /THURSDAY NIGHT THROUGH MONDAY/. Mid level troughing will persist over the Eastern CONUS late week into the weekend, becoming more amplified with time. At the surface, pesky low pressure will slowly lift northward, eventually consolidating with another system moving into the Northeast. Over the local area, troughing will prevail. Showers and thunderstorms will be possible each day, although it appears conditions will trend drier late in the period. Temperatures will be seasonable.

AVIATION /20Z MONDAY THROUGH SATURDAY/. At KCHS: VFR conditions should prevail through the evening and the first part of the overnight. Models are increasingly showing a band of showers and thunderstorms moving into the area in the early morning hours. Added in a mention of VCSH starting at 06z, with a TEMPO for MVFR visibility in showers from 07-11z. This activity should move out by around sunrise. Thereafter, MVFR ceilings will likely linger for much of the morning.

At KSAV: Showers and thunderstorms recently lifted north of the terminal but an additional band is approaching from the southwest. This activity should reach the terminal around 20z and could bring periodic IFR visibility through around 00z. There should be a lull through the late evening before another round of showers and thunderstorms approach in the early morning hours. Not confident enough to introduce anything other than VCSH for the overnight at this point. Similar to KCHS, MVFR ceilings are expected to develop closer to sunrise and linger for at least a portion of the morning.

Extended Aviation Outlook: Flight restrictions are likely at both CHS and SAV terminals Tuesday afternoon and Wednesday afternoon due to showers and thunderstorms occurring as an area of low pressure passes just inland. Tempo flight restrictions are possible Thursday and Friday due to general showers/thunderstorms that peak in coverage during afternoon/evening hours.

MARINE. Tonight: Modest southerly flow will prevail for much of the period with wind speeds generally topping out in the 10-15 knot range. Late tonight, winds across the Georgia waters will turn more southwesterly while winds along the Charleston County coast will remain south or southeasterly. Seas will average 2-3 feet.

Tuesday through Saturday: A stalled front will linger in the vicinity on Tuesday, before low pressure slowly drifts across the region Wednesday, then offshore north of the area by Thursday. The coastal waters are generally expected to stay on the south side of the front and low, favoring southwest to south winds through late week. Winds/seas are expected to remain below Small Craft Advisory levels through the week.

TIDES/COASTAL FLOODING. High tide will occur around 10 pm and the astronomical tide is 6.16 ft MLLW. Therefore, we will need a tidal departure of almost 0.9 ft to reach 7 ft MLLW. Over the last few hours, the tidal departure has been around 0.7-0.8 ft, and is expected to be similar at high tide. Therefore, the tide is expected to peak around 6.9-7.0 ft MLLW. Will hold off on a Coastal Flood Advisory with this package.

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



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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAXG1 - Sapelo Island Reserve, GA 9 mi75 min S 8.9 79°F 1016 hPa (-1.0)77°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 23 mi25 min SSW 14 G 16 79°F 83°F3 ft1016.3 hPa (+0.0)74°F
FPKG1 - 8670870 - Fort Pulaski, GA 39 mi45 min SSE 5.1 G 9.9 82°F 84°F1017 hPa

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Brunswick / Glynco, GA22 mi20 minSSW 510.00 miLight Rain77°F74°F92%1016.3 hPa

Link to 5 minute data for KBQK

Wind History from BQK (wind in knots)
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Last 24hrW8W3CalmS3CalmCalmCalmW5CalmS3SW4S3S5S5SW4S5S5S5SE10S10SE9S10S4S6
1 day agoSE10SE10SE9SE9SW5SE3CalmCalmCalmCalmCalmCalmNW3CalmCalmCalmCalmE6E8E8W6CalmE4SE9
2 days agoE11E9E7SE5NE3CalmCalmCalmCalmCalmCalmNW3N3CalmCalmNE5E7NE7E8E10
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Tide / Current Tables for Dog Hammock, Sapelo River, Georgia
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Dog Hammock
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Mon -- 04:14 AM EDT     -0.31 feet Low Tide
Mon -- 06:26 AM EDT     Sunrise
Mon -- 07:40 AM EDT     Moonset
Mon -- 10:08 AM EDT     7.03 feet High Tide
Mon -- 04:14 PM EDT     -0.20 feet Low Tide
Mon -- 08:33 PM EDT     Sunset
Mon -- 10:07 PM EDT     Moonrise
Mon -- 10:40 PM EDT     8.24 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.74.82.60.7-0.301.43.25.16.576.75.64.12.30.7-0.20.11.43.45.47.18.18.2

Tide / Current Tables for Harris Neck, Barbour Island River, Georgia
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Harris Neck
Click for Map
Mon -- 04:24 AM EDT     -0.34 feet Low Tide
Mon -- 06:25 AM EDT     Sunrise
Mon -- 07:40 AM EDT     Moonset
Mon -- 10:29 AM EDT     7.30 feet High Tide
Mon -- 04:24 PM EDT     -0.22 feet Low Tide
Mon -- 08:33 PM EDT     Sunset
Mon -- 10:07 PM EDT     Moonrise
Mon -- 11:01 PM EDT     8.56 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.45.53.31.1-0.2-0.112.84.86.37.27.26.24.72.81-0.1-01.135.16.98.18.6

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.
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Wind Forecast for Charleston, SC (17,4,5,8)
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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.