noun
strong gale
A strong gale; used in weather contexts to describe very strong winds, often stronger than a typical gale.
大強風のため、飛行機が遅れた。
The flight was delayed due to a strong gale.
強風 means 'strong wind' or 'gale' in general, while 大強風 emphasizes an even stronger or more intense gale.
Compound of 大 (dai, 'big, great') + 強風 (kyōfū, 'strong wind, gale').