What is a black blizzard?

During the drought of the 1930s in America, with no natural anchors in place, the soil dried, turned to dust and blew eastward and southward in large dark clouds. They blackened the sky and reached all the way to East Coast cities such as New York and Washington DC. Much of the soil ended up as deposits in the Atlantic Ocean, and were called ‘Black Blizzards’ and ‘Black Rollers’, and reduced visibility to a few feet. The Dust Bowl or Dirty Thirties – 1930-36 and even up till 1940 – were caused by drought and decades of extensive farming without crop rotation.