I know you're not supposed to fly in rain and snow, but I figured fog would be alright. Well, if the fog is thick and the temperature is 11 degrees F the Spark ices up really, really, fast! I hoped to get up above the fog and get some shots of the city lights shining through the fog from below. Luckily for me, I only got about 50 feet when a motor overload alarm came in and I lost total control. Down she came- luckily into some fresh powder snow. I have the video here, though