US: Adverse winter weather forecast over southern and eastern regions through at least Jan. 16

Adverse winter weather is forecast across parts of the southern and eastern US through at least Jan. 16. A winter storm system is expected to spread over the Lower Mississippi and Tennessee valleys, bringing a mix of snow, sleet, and freezing rain over a wide area from central Texas through to southwestern Pennsylvania. Snowfall accumulations of 7.5-15 cm (3-6 inches) are possible across parts of the affected area, as well as possible ice accretions. Hazardous driving conditions are likely across the region due to slippery roads and reduced visibility caused by blowing snow. Cold temperatures are also expected across the affected area over the coming days.

As of early Jan. 15, the National Weather Service (NWS) has issued winter storm warnings across parts of central and eastern Texas, far southeastern Oklahoma, northern Louisiana, central and southern Arkansas, northern Mississippi, northern Alabama, Tennessee, far western North Carolina, southern and eastern Kentucky, western Virginia, and western West Virginia. Winter weather advisories have been issued across much of the affected area and hard freeze warnings and watches are in place across parts of the region. Officials could update and possibly extend the coverage of weather alerts over the coming days.

Snow accumulations are likely across the affected area, especially at higher elevations. Lesser accumulations are possible where sleet and freezing rain mix with the snow, and precipitation is less intense. In addition to the heavy snow, strong wind gusts will likely lead to periods of blowing and drifting snow in some areas. Sporadic power outages could occur throughout the affected area.

The winter weather will likely cause ground and air transport disruptions over the coming days. Traffic and commercial trucking delays are possible along regional highways. Dangerous and challenging driving conditions are also likely on secondary and rural roads in the affected states as maintenance crews prioritize clearing major routes. Authorities could close stretches of highways if driving conditions become too hazardous. Flight delays and cancellations are likely due to ground stops and deicing operations at regional airports.