Monday, July6, 2020
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Marine Weather and Tides
Talahi 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 6:23AMSunset 8:35PM Monday July 6, 2020 4:16 AM EDT (08:16 UTC) Moonrise 9:08PMMoonset 6:37AM Illumination 99% 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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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 321 Am Edt Mon Jul 6 2020
Today..SE winds 10 kt. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.
Tonight..S winds 10 kt. Seas 2 to 3 ft. A chance of showers. A slight chance of tstms in the evening, then a chance of tstms after midnight.
Tue..S winds 5 to 10 kt. Seas 2 to 3 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 to 3 ft. Showers and tstms likely.
Wed..SW winds 10 to 15 kt. Seas 2 to 3 ft. Showers and tstms likely.
Wed night..W winds 10 to 15 kt. Seas 2 to 3 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 to 3 ft. A chance of showers and tstms.
Fri..SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Fri night..SW winds 10 to 15 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 321 Am 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 Talahi Island, GA
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location: 32.12, -80.99     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 060530 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 130 AM EDT Mon Jul 6 2020

SYNOPSIS. A weak stationary front will lift northward into Monday. An area of low pressure is then expected to develop and slowly move across the Southeast through the latter part of the week, bringing a prolonged period of unsettled weather to the region.

NEAR TERM /UNTIL 6 AM THIS MORNING/. The synoptic pattern features a stationary front lifting slowly north toward the area, with high pressure off the North Carolina coast. A weak short wave off the southeast Georgia coast is also moving north, and will help to generate isolated to scattered showers and a few t-storms over the Atlantic and coastal corridor. As isentropic ascent strengthens and coastal convergence intensifies, we look for an increase in convection, mainly in the scattered range before dawn. The best chances in the 50% range appears to be over Charleston County intro parts of Berkeley, Dorchester and maybe Beaufort County where some of the higher instability will occur in tandem with the short wave moving in. We have QPF up to 1/4 or 1/3 inch in these locations, but with locally higher amounts to occur. Temps won't change much given plenty of cloud cover and a southerly synoptic flow.

SHORT TERM /6 AM THIS MORNING THROUGH WEDNESDAY/. Monday through Wednesday: Overall, the pattern looks quite active through the middle of the week. Aloft, broad and baggy troughing will prevail with a well defined embedded disturbance progged to track eastward across Georgia and the Carolinas Tuesday through Wednesday. At the surface, a weak stationary front will start off draped across the area from west to east on Monday. Models are then in good agreement that a weak area of low pressure will develop along the front somewhere across Georgia and South Carolina on Tuesday and track eastward through Wednesday. As the weak front lifts into the area on Monday, the environment will be able to tap into a deep reservoir of moisture with precipitable water values in excess of 2 inches. In fact, the deepest moisture is progged to arrive just ahead of and with the weak surface low Tuesday and Tuesday night when precipitable water increases to nearly 2.5 inches across the forecast area. This deep moisture along with the approaching disturbance is expected to combine to produce numerous rounds of showers and thunderstorms through the period. Forecast rainfall amounts are in the 2-4 inch range, with some locally higher amounts possible. Temperatures are expected to top out in the mid to upper 80s each day thanks to widespread cloud cover, showers and thunderstorms.

LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/. Surface low pressure will likely be located off the Carolina coast at the start of the period. Large differences regarding the timing and evolution of the low exist between models, leading to a lower confidence forecast. The low should gradually lift northward through late week, although surface troughing will linger over the local area. Kept rain chances fairly middle of the road, with PoPs no higher than 50%. Temperatures will be seasonable.

AVIATION /06Z MONDAY THROUGH FRIDAY/. A nearby stationary front, energy aloft, sufficient instability and considerable moisture will lead to the potential for at least occasional impacts from SHRA/TSRA at both terminals through 06Z Tuesday.

One band of convection will impact KCHS this morning, most likely between 10Z and 14Z, leading to temporary MVFR conditions during that time. Otherwise, mainly VFR will prevail.

KSAV has their best chance of SHRA/TSRA during the afternoon into the mid evening. In fact there could be a stronger band of convection possibly impacting that site from about 20Z to 01Z in response to low pressure moving into Alabama, the sea breeze and significant moisture and instability pooling over the area. For now we have VCTS, but MVFR or even IFR is likely in heavy rains and potential gusty winds. We will address this concern in more detail with the 12Z and subsequent updates.

Extended Aviation Outlook: Flight restrictions likely at times through at least mid week due to showers/thunderstorms.

MARINE. Overnight: A weak stationary front located just to our south will lift north, orienting itself across the coastal waters by daybreak Monday. With high pressure centered off the North Carolina coast, there will be enough of a gradient to produce S winds of 10-15 kt throughout, before dropping about 5 kt or so late as the front draws closer. Seas will average 2-3 ft all waters.

Monday through Friday: Modest southerly flow will prevail Monday and Tuesday with speeds generally topping out in the 10-15 knot range. An area of low pressure is then expected to pass by just inland through Wednesday and then move off the North Carolina coast by late in the week. Behind the low, winds should turn more westerly or even northwesterly for a time. Overall, conditions should stay below Small Craft Advisory thresholds though we will have to watch trends regarding the track and timing of the low and any potential impacts on winds and wind speeds.

TIDES/COASTAL FLOODING. Astronomical influences will maintain higher than normal tide levels through Monday. Minor coastal flooding will be possible around the time of the evening high tide, primarily along the South Carolina coast. In addition, the risk for heavy rain will only add to any tidal flooding.

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

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 7 mi47 min S 1.9 G 4.1 79°F 84°F1015.2 hPa
41033 33 mi69 min SSW 9.7 G 14 80°F 82°F1014.7 hPa
ACXS1 - ACE Basin Reserve, SC 42 mi92 min Calm 77°F 1015 hPa75°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 50 mi27 min SSW 16 G 18 81°F 82°F3 ft1014.2 hPa (-1.2)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, GA11 mi21 minN 010.00 miOvercast77°F74°F92%1014.2 hPa
Savannah-Hilton Head International Airport, GA11 mi24 minN 010.00 miFair76°F73°F94%1014.6 hPa
Hilton Head Island, Hilton Head Airport, SC17 mi22 minSSW 410.00 miMostly Cloudy79°F73°F84%1015.2 hPa

Link to 5 minute data for KSVN

Wind History from SVN (wind in knots)
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Last 24hrCalmCalmCalmE4SE5SE6E10E8E13E11E9E16SE11
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1 day agoCalmCalmCalmCalmCalmE5E6E6SE7SE10SE10E8
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2 days agoW3CalmCalmCalmNE8E5E8E9SE11
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Tide / Current Tables for Turnbridge Landing, Salt Water Creek, South Carolina
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Mon -- 02:19 AM EDT     -2.50 knots Max Ebb
Mon -- 04:56 AM EDT     0.01 knots Slack
Mon -- 06:23 AM EDT     Sunrise
Mon -- 07:22 AM EDT     1.89 knots Max Flood
Mon -- 07:37 AM EDT     Moonset
Mon -- 10:54 AM EDT     -0.00 knots Slack
Mon -- 02:24 PM EDT     -1.98 knots Max Ebb
Mon -- 04:55 PM EDT     0.01 knots Slack
Mon -- 07:41 PM EDT     2.24 knots Max Flood
Mon -- 08:32 PM EDT     Sunset
Mon -- 10:06 PM EDT     Moonrise
Mon -- 11:33 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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-1.3-2-2.5-2.3-1.30.11.31.91.81.50.9-0.1-1.1-1.7-1.9-1.9-1.20.11.42.12.221.50.6

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (4,6,7,8)
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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.