MEMPHIS, Tenn. -- As snow begins to melt, low temperatures could cause roads to re-freeze overnight, according to the Shelby County Sheriff's Office. Weather statement. When the snow melts during the day and temperatures drop, SCSO said it can cause road conditions to deteriorate as the water on the roads re-freezes. Winter storm brings record snow overnight; more to come This could create icy patches, making driving hazardous, especially in the early morning hours when re-frozen surfaces may be difficult to see and navigate. Drivers are advised to exercise caution during these conditions, as even roads that initially appear clear can quickly become slippery.