In countries that recieve major, seriois snowfall such as USA, Canada, Russia, Northern Europe/Scandinavia the definition of a blizzard generally is: (1) Wind speed of 25-35mph+ (2) Heavy snowfall (3) Visibility less than 1km (4) Windchill of -25 deg.C (5) Duration of 4 hours+ However the met-office UK has a much lower threshold: (1) Moderate-heavy snow (2) Wind speed of 30mph+ (3) Visibilty less than 650 feet So there is no real 'definition' of a blizzard, these are determined by national weather centres and depend on regularity/severity of the snowfall events they recieve. I am also quite sure that some areas across the UK would have recieved UK met-office defined blizzards. Hot*Snow