The descriptions of wind forces are:
Force 0: calm
Force 1: Light air (Just sufficient to give steerage way)
Force 2: Light breeze (That in which a well conditioned man-of-war, will all sail set and a clean hull, would go in smooth water from 1 - 2 knots)
Force 3: Gentle breeze (That in which... from 3-4 knots)
Force 4: Moderate breeze (That... from 5 - 6 kt)
Force 5: Fresh breeze (That which she could just carry in chase, full and by: royals etc. and top gallants)
Force 6: Strong breeze (That which... : Topsails, jib etc, reefed upper topsails and courses, lower topsails and courses)
Force 7: Moderate gale (Ditto)
Force 8: Fresh gale (Ditto)
Force 9: Strong Gale (ditto)
Force 10: Whole gale (That which she could scarcely bear lower main topsail and reefed foresail)
Force 11: Storm (That which would reduce her to storm stay-sails.)
Force 12: Hurricane (That which no canvas could withstand)
I just thought that you would like to know. There is a list for coastal conditions relating to what fishing smacks do. It is al in the Admiralty Manuial of Navigation Volume 1 (1928) What they were doing in 1928 defining wind forces in terms of the behaviour of a square rigged ship I don't know. The state of the sea is a much better guide.
All the best
Nick