There was an event a couple days after Christmas in 1990 that was a big time overachiever. We were in a different pattern then but the system may have been similar to what is coming tomorrow night. Forecast was for 1-3/2-4 but what happened instead was double and triple that amount. Cold Temps and good ratios along with banding produced very heavy snowfall rates over a 4-6 hour period. Maybe this does the same.