Found this interesting article at the James Wharram Designs site. Compiled by Don Brazier, Wharram agent for New Zealand, it's a collection of accounts by Wharram sailors who have experienced severe weather at sea.
Thank you, Don. Go here:
https://docs.google.com/document/d/1GEIJgw30ag3t264j0c7qaq3joybcvRC3dscRzLrYNcQ/pub