Model Comparison for Thursday Snow

I mentioned early this morning that I “upped” my accumulation forecast for Thursday’s nor’easter.  That was based on new model data overnight and early this morning.  Quite a bit to take into consideration when forecasting accumulations, as temperature profiles, snow to liquid ratios, upward vertical motion in the atmosphere all play a role in how wet or dry the snow is and how quickly it piles up. I thought it might be interesting to compare that with some of our better known model guidance.  So below is a look at the RPM, NAM, GFS and European snowfall accumulation through 11pm…