A fast-moving and "potentially dangerous" cold front will sweep across Athens and the broader Attica region late Friday, bringing intense thunderstorms, hail, and sudden wind gusts, meteorologists warned.
Meteorologist Giorgos Tsatrafyllias said the severe weather system will cross the Attica basin for up to four hours Friday afternoon into the evening.
Mr. Tsatrafyllias urged caution, noting that while the phenomena are not unprecedented, the rapid collision of cold and warm air masses could amplify the storm's local impact.
According to the Meteo weather service, the storm front will trigger heavy rain and thunderstorms early Friday in western Greece, the Ionian islands, and Epirus before tracking eastward.
Central Greece will see severe conditions by midday, with the system reaching the Aegean islands, Macedonia, and Thrace by nightfall.
Snow is expected at elevations above 1,200 meters (3,900 feet) on the Pindus mountain range.
Across the country, temperatures will fluctuate sharply, ranging from sub-freezing lows in northern mountain areas to highs of 22 C (71 F) in Crete. Gale-force southerly winds reaching up to 38 mph (61 kph) will whip the Aegean Sea.
In the Greek capital, residents will see patchy morning fog give way to strong afternoon showers and isolated thunderstorms.
Highs will reach 16 C (61 F) before the severe weather sets in and eventually clears by late evening.
In the northern port city of Thessaloniki, moderate to strong winds will accompany increased cloud cover throughout the day.