A large section of the Northern Plains is under a Winter Storm Warning for Sunday, February 18th and Monday, February 19th. The South Dakota Department of Transportation has issued a No Travel Advisory, effective 12:25 MST, for Interstate 90 from the Wyoming border to Exit 110 near Wall. Other advisories or closings could take place as a result of this system.
Anyone planning to travel in the affected region should monitor local radio or television broadcasts. Road condition information is available by dialing 5-1-1, a free call from any phone in South Dakota. Online highway updates are found at http://safetravelusa.com/sd.
The nation's advisory and warning map from the National Weather Service can be seen below:
Credit National Weather Service