Driving on black ice: Tips for avoiding a hidden danger on the road KTRK Share: HOUSTON, Texas (KTRK) -- With the winter weather expected in the Houston area soon, it's possible that drivers will encounter black ice on the roads, especially on Presidents Day. Black ice forms when the air is at or below 32 degrees and rain is falling. The cold ground temperature causes the precipitation to freeze upon impact, creating ice. Sleet and the refreezing of snow or water can also generate black ice. If you've never driven on it, here's what you can do to keep control. Jennifer Stockburger oversees operations at Consumer Reports Auto Test Center. Her number one piece of advice for driving on black ice is to give yourself space around your vehicle.