Meteorologist Nikoletta Ziakopoulou warns of severe storms expected across Greece on Friday and Saturday, particularly in western regions and the Aegean Sea, with snowfall in northern mountainous areas. Temperatures will drop starting Sunday, and unsettled weather is anticipated throughout the Christmas week, featuring rain and storms. On Friday, rain will begin in the Aegean and western areas, intensifying later. Conditions in Attica and Thessaloniki will also see rain. Saturday will bring strong thunderstorms, especially in the west and Aegean, along with snowfall in the north.