CLARKSVILLE, TN (CLARKSVILLE NOW) – The snow alert from the National Weather Service has been upgraded to a Winter Storm Warning, from 3 a.m. Friday to 6 a.m. Saturday. “Plan on slippery roads and difficult travel conditions,” the Warning said. “The hazardous conditions could impact the Friday morning and evening commutes. If you must travel, keep an extra flashlight, food, water, and warm clothes in your vehicle in case of an emergency.”