As Kim noted about a week ago, there have been some hints and threats of an ending field season going around, here and there in the west.
My first clue that the field season was ending, besides seeds falling everywhere, was some bright shiny frost I saw while driving to work one morning. I'm not sure it was the first frost, you understand, but it was a definitely photogenic frost.
Photogenic frost - on grass 'neath juniper tree - light and shade combined.
Later in the day, clouds moved in, making it difficult to tell one gray rock from another. A weak sun column (or sun pillar) formed in the west in the gray sky.