Storm Byron continues to bring heavy rainfall and thunderstorms across much of eastern and southern Greece, affecting the country from Friday, 05-12-2025, through Saturday noon, 06-12-2025.

The rainfall will not only be intense but also long-lasting, with many areas experiencing localized hail and strong gusts of wind at times.

Areas Affected Today (Friday, 05-12-2025)

The weather system BYRON is causing severe weather primarily in eastern Greece. Specifically, heavy rain and thunderstorms are expected in:

• Central Macedonia
• Thessaly and the Sporades islands
• Eastern Aegean islands (from Chios southward) and the Dodecanese
• Cyclades and mainly the western and southern parts of Crete, until early afternoon
• Central and eastern mainland Greece (including Attica) and Euboea, until early afternoon

These areas will experience particularly severe and potentially dangerous conditions (red alert):

• Regional units of Pieria, Imathia, Pella, Chalkidiki, Thessaloniki
• Thessaly and the Sporades
• Eastern Aegean islands (Chios and southward) and the Dodecanese
• Until early afternoon, Euboea

Forecast for Saturday (06-12-2025)

From early morning, storm intensity is expected to weaken in most areas and become more localized:

• Central Macedonia (regional units of Pieria, Imathia, Pella, Chalkidiki) until morning
• Dodecanese (from Samos southward) until midday