Kansas City International Airport, for example, has an 85% chance of snowfall exceeding .1 of an inch, according to data from the weather service. The probability of higher snowfall totals drops rapidly, with only a 50% chance of snowfall exceeding 1 inch. The chance of 2 inches or more of snow is less than 10%.

A powerful winter storm that dumped heavy snow and glazed roads with ice across much of Texas and Oklahoma lumbered eastward into Southern U.S. states Friday, making for dicey travel and a rare snow day for many students.

The storm piled up more than a year's worth of snowfall on some Southern cities. As much as a foot (about 31 centimeters) fell in parts of Arkansas. There were reports of nearly 10 inches (about 25 centimeters) in Little Rock,