The South Dakota Departments of Transportation opened the closed portions of Interstate 90 and Interstate 29 in both directions on Saturday afternoon.

Officials are advising motorists that even though the interstates are open, driving conditions are still difficult across the eastern part of the state. The blizzard warning for these areas remain in effect until 6 p.m. Saturday.

The following advisories are from the South Dakota DOT:

Roadways are ice covered, snow-packed and slippery, and continue to experience drifting in open areas, and at bridge ends and overpasses. Visibilities are low to near zero with continued wind gusts up to 50 mph and white-outs happen without warning. High-profile vehicles especially will have difficulty travelling and should postpone travel until the winds go down.

Crews are out clearing drifts, but with the low temperatures and high winds, chemicals are ineffective at melting ice. No Travel Advisories will remain posted on portions of the interstate and many other state highways until winds go down and the storm system passes through the state.

Travelers are encouraged to postpone travel until this storm system exits the state. Anyone choosing to venture out today is asked to use extreme caution, take your time, reduce speed, avoid distractions, wear your seat belt (all occupants), keep the cruise off, physically turn on your headlights so you can be seen, be prepared for changing conditions, and allow extra space between you and the car in front of you.