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March-April 2009

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Weather Queries

I took some images of a strange ice formation that appeared in my birdbath in mid-March 2008. I’d like to know how the hollow, triangular ice object formed. 
 
Jeff Hutton,
Alexandria, Kentucky

I checked the daily weather records for March 2008, for Cincinnati, which is about 20 miles northwest of where you live. The most likely time for this unusual ice “sculpture” to have formed is March 7-9, when a cold snap resulted in the following daily temperature ranges: 22 to 33°F on the 7th, 17 to 25°F on the 8th, and 6 to 40°F on the 9th.  By the 12th, it was too warm (55°F) for the formation to have survived.

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