EMY Forecasts Severe Storms in Greece With Red Alerts for Sporades and Euboea

A rapid deterioration of weather conditions is sweeping across Greece, according to the latest emergency warnings from the National Meteorological Service (EMY).

Beyond the rain, the EMY warns of high lightning frequency and the potential for local hailstorms. In several regions, these phenomena will be accompanied by strong winds in the form of squalls, as reported by ΤΟ ΒΗΜΑ.

Red and Orange Alerts: Friday’s High-Risk Zones

The most severe warnings are concentrated in the east and north. For Friday, July 24, the EMY has designated specific risk levels based on the expected intensity of the storms.

• Red Alerts: These are in effect for the Sporades and Euboea (specifically central and northern areas) starting from the midday hours, as well as the coastal and seaside regions of eastern Thessaly, according to Diaforetiko.
• Orange Alerts: These apply to Central Macedonia—including the prefectures of Pieria, Imathia, Chalkidiki, and Thessaloniki—from the morning until late night. Orange warnings also cover eastern Thessaly (Larissa and Magnesia) from midday until late night, and the islands of the northeastern Aegean (Lemnos, Thassos, Samothraki) starting late in the evening, as detailed by reader.gr.

Eastern Sterea, which includes Attica, is also under an orange alert for Friday afternoon through late evening. While Newsbeast reports that Attica is definitely affected, the alert level there remains orange rather than the critical red level seen in Euboea.

Saturday’s Forecast: Persistent Threats in Euboea and the Sporades

The storm system will not clear quickly.

, high-level warnings remain in place for Saturday, July 25, primarily in the Sporades and Euboea. Red alerts will persist in these areas until the early morning hours in the Sporades and until the late morning in central and northern Euboea.

Other regions will see a gradual tapering of the weather, though risks remain. Orange alerts continue into the early hours of Saturday for the northeastern Aegean islands (Lemnos, Thassos, and Samothraki) and the eastern coastal areas of Magnesia.

Immediate Local Conditions: Attica and Thessaloniki

For residents currently monitoring the weather on Thursday, July 23, the transition to the storm system is beginning with varying conditions. In Attica, the forecast includes a few clouds that may increase around midday and afternoon, bringing the possibility of local rain. Winds are currently blowing from the north at 4 to 5 Beaufort, reaching 6 Beaufort in the east during the morning, before shifting to east-southeast and weakening in the afternoon, as reported by reader.gr.

Temperatures in Attica are ranging from 25 to 34 degrees Celsius. Meanwhile, in Thessaloniki, the weather remains characterized by light, occasionally increased cloudiness, with north-northwest winds at 4 to 5 Beaufort, shifting to variable speeds of 2 to 3 Beaufort by the afternoon.

Region	Friday Alert Level	Saturday Alert Level
Sporades / Euboea	Red	Red (until morning)
Eastern Thessaly (Coastal)	Red	Orange (Magnesia)
Central Macedonia	Orange	N/A
Attica / Eastern Sterea	Orange	N/A
NE Aegean Islands	Orange	Orange (early hours)

The EMY’s focus remains on the high-risk coastal and island zones where the combination of heavy rain and squalls is expected to be most volatile through the morning of Saturday.