DISCUSSION: As we take U.S. weather history all the way back to June 1947, we arrive at an unusually cold, late season storm system brought significant snow Wyoming and Colorado. As a result of this mid-Spring winter storm, the maximum snowfall amount in both states was 20 inches at Silver Lake, Colorado. As per the dialogue from the "This Day in Weather History" team: "Since 1883, Cheyenne Wyoming has seen more than a trace of snow 16 times during the month of June. The most recent June snowfall occurred on the 4th and 5th, 1998. The total snowfall amount on these two days was 0.7 inches. The most snowfall in June took place on the 11th and 12th, 1947 when 8.7 inches fell. This late snowstorm caused significant losses to livestock. One rancher in the Cheyenne area reported a loss of approximately $15,000 in livestock. In Natrona County, losses were estimated at $125,000 with most confined to newly shorn sheep and young lambs." More information pertaining to this historic winter storm can be found at the following link.
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©2017 Meteorologist Jordan Rabinowitz