I remember only one significant ice storm that didn't begin with frozen precip, usually SN but a couple times IP. That one event, Dec. 11-12, 1970 in NNJ, produced the weirdest looking lawns ever, with grass blades encased in 3/4" ice and not a speck of snow on the ground before or during the event. Probably my #3 ice storm, vying with Dec 1983 in Fort Kent, but orders of magnitude below 1953 and 1998.