How about 20 decades ago and 200 to come. The Chinook belt might be the new trade winds so if we are cooling off that will still bring in Pacific air, Go south and it should get warmer ans drier to the south-west and wetter and colder to the Great Lakes Region. If it goes the other way the land will still get rain thanks to the Great Divide. Alberta could live with an ice free year round Hudson Bay.Rebranding the Canadian econmoy in the wake of the oil slump
Returning it to the structure that it had three decades ago, more like.