Nice to know they do cancel them now and again
"A storm blowing from the south west in Istanbul has forced Turkish Airlines (THY) to cancel 42 domestic and international flights.
Heavy wind storm, which began on Wednesday and is expected to continue until noon today, has resulted in numerous delays at the Ataturk International Airport."Full story if you really must:
http://www.world-first.co.uk/home/news/flights-axed-in-turkey-windstorm$45600.aspx