I just checked the observations, wasn't that quick of hitter. Wonder if you're thinking Feb 4th? That was a classic quick hitter...dropped 3-5" in 4 hours area wide.
Feb 15th....after morning snow dropped 1-2" there was a lull all afternoon...then snow began at 5pm, ending at 9am the 16th. Heaviest snow rates in the 10pm-3am window. New snowfall was 8-9" for Detroit and its eastern burbs, on top of the 1-2" from the earlier morning. Snow depth after the storm was 14" at Detroit and 18" at Toledo.