We used weather records contained in Chinese historical documents from the past 500 yr to search for extreme snow events (ESEs) that were comparable in severity to an event in early 2008, when Central and Southern China experienced persistent heavy snowfall with unusually low temperatures. ESEs can be divided into 3 groups according to the geographical coverage of snowfall, using the following criteria to define an ESE: >15 snowfall days, 20 snow-cover/icing days, and 30 cm total cumulated snow depth for an individual winter. The first group covers the whole of Eastern