TRIVIAL PURSUITS: What is the latest recorded snowfall in the U.S.?

But, this is by far not the latest date snowfall was ever recorded in the U.S. Do you know when the latest snowfall ever recorded occurred?

According to Weather Underground, on June 11, 1842, widespread snow fell over northern New York and New England and snowflakes were observed in Cleveland, Ohio; Boston, Massachusetts; and Harrisburg, Pennsylvania. Accumulations of 10 to 12 inches were common in Vermont.