"If you need to drive out in bad weather, slow down and be aware of road conditions," said police.
A video from the incident control camera, dubbed "shocking" by the state patrol, showed the state policeman and another person examining the damage from an accident that had previously occurred on the highway.
While the two are walking, another truck loses control on the interstate and enters the scene, barely missing the soldier and another man.
Iowa State Patrol said that the truck driver, the state police officer and the truck's occupants who lost control were not seriously injured in the accident.
Between 8 am on Friday and 8 am on Saturday, officials said the Iowa State Patrol responded to 371 total service requests, including 150 accidents and 221 driver assistance, as winter created dangerous conditions for driving .
The National Weather Service issued a blizzard alert on Saturday for northwest Iowa, as well as warnings of winter storms and weather conditions for most other parts of the state as the storm passed.
The storm system began to move across the plains and the Midwest on Friday, causing problems at Chicago and Kansas City airports and on roads in the region.
In Nebraska, the winter storm that hit the state on Friday was blamed for at least one death on Interstate 80, the Nebraska State Patrol reported Saturday. Patrol said the driver was killed on Friday when the truck he was driving got out of control, crossed the median and hit a semi-trailer.
Nebraska troops responded to more than 200 weather-related incidents across the state. Most were to help stranded drivers, but 55 were accidents, the patrol said.
The system ended up moving to the Northeast on Saturday night, introducing a bitterly cold air behind it.
The Associated Press contributed to this report.