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Old 03-06-2021, 03:25   #1
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Tybee Island to Gulf Stream

Heading to Chesapeake from mouth of Savannah River. Coming in here we experienced 2-2.5 knots of southerly counter current for 75miles or more before reaching coast. Want southerly wind to head north in Gulf Stream but wanted to know what crossing that counter current will be like in 20knots of opposing southerly breeze to reach GS.
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Old 03-06-2021, 04:39   #2
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Re: Tybee Island to Gulf Stream

I've measured the counter current off St. Catherine's Island, south of you, several times. It is variable, at least year to year, and usually less than 2-2.5 knots. I don't thimk of hitting it going north as anywhere near the problem of hitting the Gulf Stream going south. With a 20 knot wind, I'd expect you to cut right through it. That said, do get out to the GS as soon as possible.
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Old 03-06-2021, 05:22   #3
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Re: Tybee Island to Gulf Stream

Thanks. Perhaps the current we witnessed was atypical due to the heavy N wind at the time
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Old 03-06-2021, 05:36   #4
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Re: Tybee Island to Gulf Stream

I definitely don't have long term knowledge of the area, but I don't believe there is always a counter current along that shore. According to Windy there is northbound current there ... currently.
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Old 03-06-2021, 06:34   #5
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Re: Tybee Island to Gulf Stream

I have do that section of the SE coast 4+ times and never noticed any GS current. Now the currents at the various entrances are a different thing!
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Old 03-06-2021, 07:39   #6
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Re: Tybee Island to Gulf Stream

My hydrologist colleague tells me that indeed the countercurrent loop in the Georgia Bight is quite variable and sometimes is not there at all. I have seen a northbound shore current in the area. On the other hand, the tides in that area have highs of 5.5 to 9.0 feet, and are on a 25 hour cycle, so the currents at any of the sound entrances are humdingers.
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