US: Adverse winter weather forecast over central regions through at least early Jan. 13

Adverse winter weather is forecast across parts of the central US through at least early Jan. 13. A winter storm system is expected to emerge over the central plains Jan. 11 before moving towards the Great Lakes through Jan. 12. Heavy snowfall is expected to be accompanied by strong winds, which may lead to blizzard conditions in places. Snowfall accumulations of up to 15-30 cm (6-12 inches) are possible across parts of the affected area over the coming days, with localized higher amounts possible. Hazardous driving conditions are likely across the region due to reduced visibility caused by blowing snow.

As of early Jan. 11, the National Weather Service (NWS) has issued winter storm warnings across parts of eastern Nebraska, southeastern South Dakota, northwestern Missouri, Iowa, southern Minnesota, southwestern Wisconsin, and northwestern Illinois. Winter storm watches and weather advisories have been issued across much of the affected area. 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. Blizzard conditions are possible. 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.