On Fri, 14 Dec 2007 20:32:08 -0500, HK wrote:

How fast can conditions change 50 miles out from shore on the Atlantic?

That's not the right question.

The issue is how much can conditions change while you are returning
from xx miles offshore. If you typically get 30 minutes warning
before a severe thunderstorm, and it's going to take 2 hours to get
back into port, those are not very good odds.