From Longman Dictionary of Contemporary Englishnorthwesterlynorth‧west‧er‧ly /ˌnɔːθˈwestəli $ ˌnɔːrθˈwestərli/ adjective 1 SGtowards or in the northwest We headed off in a northwesterly direction.2 HEMDNa northwesterly wind comes from the northwest
Examples from the Corpus
northwesterly• They rode almost due north, making for Birdsall Brow and facing into a gusty northwesterly breeze. 