As we progress into autumn, not only will the temperatures slowly drop, but our sky will change as well. No, the sky will stay blue, but instead of being filled with puffy cumulus clouds that on occasion turn to thunderstorms, our clouds instead will become flat and like a sheet. In fact, the word stratus comes from the Latin word for layer. North Dakota will quickly become a transitional zone between the warmer south and the colder air developing quickly in the Arctic. This in turn will bring numerous cloudy days and almost of those days the sky will appear as if there is but one large cloud over head. No surprise then, that October through December is the cloudiest time of the year.