File:US Weather Map, 7 Nov 1913.png
This image was copied from wikipedia:en. The original description was:
Weather map drawn by the Weather Bureau's Toledo observer and published in the Toledo Blade in Nov. 1913. Depicts the formation of the w:en:Great Lakes Storm of 1913. Unlike modern weather maps, these showed no warm/cold fronts, since frontal mechanisms were not yet understood, and isobars were located in part by eye and guess. (Courtesy: White Hurricane, via Toledo-Lucas County Public Library).
Friday, November 7th: The East Coast high hasn't moved much, but a new low is shown centered over Minnesota/Wisconsin. This was probably a misrepresentation of an upper-level trough, which meteorologists had no knowledge of in 1913. Unknown to the Weather Bureau, a cold front is sweeping across Lake Superior. Behind it are gale-force northwest winds, and ahead of it are southwesterly gales. The Weather Bureau posted storm warnings at 10:00am Friday. (excerpt from White Hurricane)
This image or file is a work of a United States Department of Agriculture employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.
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00:24, 8 February 2005 | w:en:User:Brian0918 | 1000×570 | 213 KB | Weather map drawn by the Weather Bureau's Toledo observer and published in the Toledo Blaze in Nov. 1913. Depicts the formation of the <a href="/key/Great_Lakes_Storm_of_1913" title="Great Lakes Storm of 1913">Great Lakes Storm of 1913</a>. Unlike modern weather maps, these showed no warm/cold fronts, since frontal mechanisms w |