Suddenly Fall

Since arriving here in Bismarck two weeks ago the trees have been beautifully green leaved.  Then overnight they seemed to have turned.  Yesterday I noticed hint of yellow and now, a day later, there are serious signs of yellowing.  I feel Fall comes fast here in North Dakota and I'm trying my hardest to wring out every bit of sunny warm enjoyment from these fleeting 70 degree days.  Winter is coming.