I'd agree on the aggressive. We have only rain or snow in the forecast, which is why our totals are so high. The lowest ratio we have is about 6:1, but if it sleets it's going to be much lower than that (can probably halve your snow amount in that window).
Biggest red flag I'm seeing right now is that no matter where I click around for a sounding I'm seeing the DGZ around 500 mb. I prefer it around 700 mb because that's where lift tends to be maximized. When the DGZ is up at 500 mb it's a warm atmosphere and lift is poorer and ratios usually stink. I wouldn't be going with climo ratios with this one if it were my forecast.