 Sioux Falls , South Dakota saw visibilities of below 1 ⁄ 4 mile ( 0 @.@ 4 km ) for 24 straight hours , and just east of Sioux Falls a 2 @,@ 000 @-@ foot ( 610 m ) broadcast tower collapsed under the storm 's fury . In Willmar , Minnesota , 168 passengers were trapped in a stranded train for hours , unable to walk to shelter because of dangerously low wind chill values . In Omaha , Nebraska a foot ( 31 cm ) of snow fell , Sioux Falls saw 7 inches ( 18 cm ) , Duluth , Minnesota saw 8 inches ( 20 cm ) , and International Falls , Minnesota saw 24 inches ( 61 cm ) . 
