Its all very complicated! At the least likely, or least desireable extremes; Positive NAO may at times, be associated with an active Atlantic opposed by a Scandinavian or Russian high, bringing cold southeasterly flow over the UK, and Atlantic systems bringing rain can turn to spells of snow or blizzards. Early 1996 may have been a good example :huh: Negative NAO may at times, be associated with mild and cloudy anticyclonic northwesterly flow over the UK, whilst spells of cold polar activity affect Scandinavia and central/ eastern Europe. Late January through to mid February this year paints a good picture of that. :huh: