And an animation of enhanced IR satellite pictures for the phenomenon:
http://users.med.auth.gr/~pro/salonica/200606.wmv

Damages were reported by hail in the eastern suburbs of Thessaloniki,
while the strong winds associated with the phenomenon caused some
problems, too. Strong winds with average speeds up to 80 kph are now
being reported in Thessaly (both in Volos and Larisa) to the west of the
SSEwards moving thunderstorm.

Yannis, SE Athens
+26.8C, RH 54%, SLP 1011.9 hPa