Thundersnow drops more than 5 inches of accumulation at O’Hare, cancels more than 1,000 flights

A spring storm dumped more than 5 inches of snow on parts of the city and brought sightings of a rare weather phenomena — thundersnow — on Sunday, nearly breaking the record for snowiest day this late in the season, according to meteorologists

Here’s a link to the story at the Chicago Tribune.