"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
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Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.
DUST STORM (1934)
The storm reach Dubuque and Madison by late in the afternoon and by evening was dumping 12 million tons on Chicago--four inches for each resident. On May 14th ships 300 miles off the coast of the United States reported dust on their decks.
Huggett, Richard John. Fundamentals of Geomorphology - Page 337 https://www.google.com/search?q=dust+storm+in+dubuque+%281935%29&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a#q=dust+storm+in+dubuque+%281935%29&hl=en&client=firefox-a&hs=El4&tbo=d&rls=org.mozilla:en-US:official&ei=l6WtUIyuC4SQ9gSB1oDYCg&start=10&sa=N&bav=on.2,or.r_gc.r_pw.r_qf.&fp=10ba8070072772da&bpcl=38897761&biw=901&bih=401