Two powerful winter storms Saturday threatened dangerous winds and heavy snow from the Northern Plains to Upper Midwest, and hail and tornadoes from northeast Texas into southern Indiana.

AccuWeather Senior Meteorologist Alex Sosnowski warns of heavy, wind-driven snows from the Dakotas to parts of northern Michigan from Saturday night to Sunday morning.

The National Weather service warned of hazardous driving conditions on the snow-covered roads in the target areas.

Wind gusts in excess of 50 mph threaten to topple high-profile vehicles and bring widespread power outages and property damage, according to AccuWeather.

Winter storm warnings were in effect from parts of the northern Plains into the upper Mississippi Valley.

By mid-morning, parts of the western Dakotas had already seen up to 9 inches of snow.

Much of central and western Minnesota, in the Twin cities, was bracing for up to 10 inches of snow.

In the south, warm, humid air pushing out of the Gulf of Mexico ahead of a cold front is expected to produce heavy rains, thunderstorm, hail and possible tornadoes from the central Gulf Coast to the Ohio Valley.

The Weather Channel says a powerful jet stream pushing into the Mississippi Valley will deliver the deep wind shear – the change in wind speed and direction with height – required to support severe thunderstorms.

But, TWC cautions, there remains some uncertainty as to number of severe thunderstorms that could develop as well as the magnitude of the tornado threat.

By mid-morning, however, four tornadoes had already touched down in Arkansas and Louisiana.