Ground fog water crystals, 3 February 2016 just after 11:30 PM EDT
What is that? Out the window I see one area is clear while a few feet away it looks like smoke. I go outdoors to make sure nothing is on fire. No odor. No apparent source. And as I turn to go back inside, a few feet away from me a large cloud slowly glides by out of the dark. I move onto my backyard deck where the temperature is almost 40ºF. I look up to see stars when I notice the source, big low white clouds, some touching the ground. Ground fog.