From April 26 to May 5, 1952 there was a remarkable heatwave centered over the Northern Plains, Saskatchewan and Manitoba. North Dakota was over 90 degrees nine out of ten days, and reached 99 degrees on April 28.
Winnipeg was almost 25 degrees hotter than Phoenix on April 28, 1952.
28 Apr 1952, Page 1 – Argus-Leader at Newspapers.com
via The Deplorable Climate Science Blog
May 1, 2019 at 07:47PM
Iowa Climate Science Education 