The Mosul dam is on the Tigris river which originates in the Taurus mountains of Turkey. We had a fairly regular winter as far as snowfall goes, but the spring has arrived very early this year.
So this is Turkey's fault. They ought to redirect the river into the Black Sea or directly into the Mediterranean Sea. Other solutions are selling it as bottled water (with a suitably high price: buy this water or the children die!) or boiling it off to cool a power plant.
Do they really have snow worth to speak of in Iraq?