Hi Daniel*, that would be an impressive ammount which equates to around 30 inches going by 1 inch of rain = 10 inches of snow not including drifts, this would probably have been a more localized event in for our region unlike 63 which was more widespread, infact the chart you show is not that far off the mets 3rd of feb 1947 chart, so you,re right if only it was mid winter, mind you the following melt/flooding would be a big problem.!!