The weekend storm tore through, bringing down leaves in some places and leaving them vibrant and intact in others. By morning, the scuffling and the quiet call notes of migrating white-throated and song sparrows enliven fields and woods, edges and shrubs. Tamaracks have started to yellow overnight, and, in Montpelier, the mass leaf drop of the huge old ginkgo tree at 143 Barre Street, the morning of the first hard frost, becomes more possible. Thousands of golden fans falling in a couple of hours? Will it happen this year? If so, when?