7:12 p.m. update
Highway 17 north of the Sault has reopened.
Original story from this morning
Weather conditions have shut down Highway 17 north of Sault Ste. Marie.
Ontario 511 says all lanes are closed between the MTO weigh scales in Heyden and Highway 101 (E) in Wawa.
A snow squall warning remains in effect for the Sault and surrounding areas.