esp. of wind, weather, etc. (Here there is contact with sense A. 5)

Of a storm: adverse. Obsolete. rare.

Of a person: perverse, self-willed; (of a wind) contrary, unfavourable.

esp. of winds, weather, etc.

Nautical. Of a wind or tide: unfavourable to the course of a ship; contrary. Later also Aeronautics: designating winds unfavourable to the course…

Contrary, adverse. Obsolete.

Not favourable, in various senses. Of winds or weather.

Of the wind: Unfavourable.