(NBC News) Slippery conditions in parts of the Midwest are about to get worse.
An arctic blast moving across the nation has already dumped heavy snow in the Rockies and upper Midwest is expected to cause a crippling ice storm this evening.
It's path is from Dallas to Little Rock, on to Memphis into the Ohio Valley, and even as far north as Cleveland.
Crews in a dozen states are gearing up for the storm.
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