西北风
a wind that comes from the northwest
  A cold, wet start to summer with strong northwesterly winds made it difficult for the butterflies to migrate.
 Being on a hillside, we are exposed to strong northwesterly winds for much of the year.
 It will be a cool day with fresh northwesterly winds.
 Northwesterly winds buffeted the west coast as temperatures fell to -4 below zero.
 The fires were driven by strong northwesterly winds.
 See also: northwesterly adjective