The westerlies, anti-trades, or prevailing westerlies, are prevailing winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude. They originate from the high-pressure areas in the horse latitudes and trend towards the poles and steer extratropical cyclones in this general manner.
Moreover, is a westerly wind cold?
A true, classic north westerly wind brings polar maritime air towards the UK. This is an air mass that has polar origins, yet has travelled over the mid-Atlantic. So it is cold, but has been warmed from below by the relatively warm Atlantic Ocean. However, this week's mild air has a very different origin.
What does it mean when it says wind is NW?
These instruments point into the wind so they would point north during a north wind. Likewise, winds don't have to come directly from the north, south, east, or west. The winds can also come from the northwest or southwest, which means that they blow toward the southeast and northeast respectively.