Why Gulf Stream
Wave Heights Can Be Much Higher Than Forecasted
"When crossing a boundary current
like the Gulf Stream
mariners must be aware of the wind
and sea forecast
before departure and while underway.
If wind waves or swell are opposing the set of the current or if arctic air is streaming offshore at right angles to the current a mariner should anticipate a risk for encountering wave heights from 40% to 100% higher than the general forecast values near the north wall of the current and also crossing eddies."
"..there is documentation of waves being up to five (5) times the expected significant wave height values, as driven by higher winds. "
Have you experienced the much higher than forecasted seas while crossing the Gulf Stream?
If so, share your anecdote in comments below.
Here is a link to the full article which has some illustrations.
High Wind and Wave Events Crossing the Gulf Stream, Explained â€“ gCaptain