Larissa sits in the fertile Thessaly plain in central Greece, an agricultural region that suffered catastrophic flooding in September 2023 when Storm Daniel dropped an extraordinary amount of rain over a very short period, overwhelming rivers and inundating vast areas of farmland and the city itself in what became one of the worst natural disasters in modern Greek history. Under normal conditions the city receives a fairly modest 450 mm (about 18 inches) of rain a year, concentrated in autumn and winter, but that event demonstrated how a single extreme storm can dramatically outpace any seasonal average. Because the plain’s flat terrain means water can spread widely and linger, radar tracking of an approaching intense storm system is now treated as critical by regional authorities. Greece’s National Meteorological Service operates the national radar network.
Learn more: Flash Flood Warning Signs on Radar · Open the full Rain Map