During the cold phases of La Ni Z a, storms coming out of Texas or Oklahoma can track over or just south of this region and bring bands of significant snow. Cold weather that follows keeps the snow around for awhile. Most or all the snow usually disappears during the thaws and warm phases that inevitably follow. They can bring heavy snows out ahead. Even when the storm ends up north of the area and the precipitation turns to rain or sleet, it is usually after a good dose of snow has fallen.
More snow often follows the storms as cold air rushes back in, and it sometimes lasts for days.
This region can build up a deep snowpack during these stormy cold periods. The La Ni a thaws will eat away some at these snow packs, especially if rain events occur. However, the North Atlantic could affect the outcome here. Increasing snowfall if the NAO is predominantly negative and decreasing it if it turns out positive. When cold air is entrenched, with arctic high pressure hanging tough north of this region, storms coming out of the Midwest may be forced to develop just south of this region and then moderate snowstorms or possible ice storms can result.