"Yannis" wrote in message
...


The Föhn effect is very typical in April, especially in northern Crete
and parts of eastern continental Greece, making some -both spatially
and temporally- non representative station records stand out. The
beginning of the southerlies was visible as advection fog in Athens,
too, on Saturday, as air originating from Sahara found its way to
Greece after having passed over the still relatively cool
Mediterranean.


A picture from the Southern Euboean gulf (east side of the Attica peninsula,
where Athens is situated) on Saturday, as cooling down the warm, humid air
to its dew point was an easy task when the southerlies took over:
http://users.otenet.gr/~billija/Capture_002.jpg

Advection fog is more frequent in Greater Athens in April and May. In other
areas, such as the Central Macedonian plains, it frequently happens in
winter and early spring when mild southerlies pass over snow covered areas.

Yannis/NL