The definition of the weather categories and the selection of the cases of each category was done according to the instructions and recommendations of the World Meteorological Organization.
December was a warm month till last week with a lot of rainfalls but few snowfalls over high enough plateaus. In contrast at the end of month, due to prevailing of extremely cold air masses over Greece, the temperature declined rapidly, intense snowfalls covered the mountainous parts of central and southern country while northern strong gale force winds prevailed over Aegean area. Also very strong rainfalls and thunderstorms recorded over south Aegean area and Crete island...
