similar (on a smaller scale) to two weeks ago when everyone thought the rain would switch over around midnight and it actually kicked in by 6pm...
I actually enjoy watching these type of (rain to snow) storms unfold as there is often that element of surprise...
seem to recall a huge bust back on Dec 31, 1975 (the year they moved the liberty bell)...
just rain was forcasted and woke up to a foot of snow!!