Brad Lambert was last seen Nov. 15 in the Marchand area. Winnipeg police say they are 'extremely concerned' for his well-being. (Winnipeg Police Service)

Winnipeg police are asking people across Manitoba and Ontario to look out for Norman Brad Lambert, a 46-year-old man who has been missing for more than three weeks.

Lambert, who commonly goes by the name Brad, was last seen on Nov. 15 in Marchand, Man., where he purchased supplies for a deer hunting trip in the southeastern part of the province.

He was reported missing days later, after he failed to show up at work.

His family and friends, as well as an RCMP team, searched for Lambert in the Sandilands Provincial Forest area, where he was going hunting.

However, his whereabouts are still unknown, city police said Friday.

In a release, police say they are "extremely concerned" for Lambert's well-being.

Family members have said it's not normal for Lambert, a family man, to simply vanish.

Police are asking residents and business owners in both Manitoba and Ontario to "check any outbuildings such as outdoor storage sheds, abandoned structures and garages on their properties" for any sign of Lambert.

Police say Lambert was last seen driving a black 2011 Ford F-150 pickup truck, similar to the vehicle pictured here, with Manitoba plate number FGK 157. (Winnipeg Police Service)

Lambert is described as being six feet tall and weighing about 240 pounds. He has brown hair with some grey on the sides and was last seen wearing camouflage clothing.

He was last seen driving a black 2011 Ford F-150 pickup truck with Manitoba plate number FGK 157.

Anyone with information on his whereabouts is asked to call a local police agency or the Winnipeg Police Service's missing persons unit at (204) 986-6250.