Yesterday as the day dawned we saw that a heavy, freezing fog had formed overnight. I went out into it with the dog. It didn't really feel very cold out in the vineyard, but everything more than a foot or two above ground level was covered in tiny, spiky icicles. They looked like thorns or needles, but they were just ice formations.
Late in the afternoon, all the little ice spikes had melted. Then it started snowing. I don't know yet whether it snowed more overnight. The temperature is just below freezing this morning.