It was fog rather than snow that was the problem yesterday. Both morning flights from NWI were cancelled. Fortunately we were booked on the afternoon flight which was the one that did make it (we left NWI about an hour behind schedule). It was still slightly misty when we got there but then turned into a sunny afternoon.
Don't know what happened to the people whose flights got cancelled... there was a long queue at the KLM ticket desk when we got there at 1245. I suspect some will have been put on our flight, I feel sorry for those that didn't!