For Hilton Head Reef - 100" Barge + tires :
No gale warning.
The reliability of the situation is very good.
Fair weather with mostly clear skies. In the evening, relatively cloudless skies clearing.
N force 3 turning E in the middle of the day then ENE. Gusts reaching 13 knots from the middle of the day. Slight sea. Low, short swell from ENE. Good visibility becoming excellent in the middle of the day.