Ok , I’m still up.   It’s 11:45 and the GFS has almost identical QPF as the NAM and a bit colder.  It’s looking like at least12 inches  in PHL and  immediate surrounding suburbs north and west.

The latest NAM data has become available and it has reverted back to a somewhat warmer, but more intense storm.

Latest QPF value has increased to 1.30 inches water.

For the Philadelphia area and immediate suburbs, it shows about 6-8 inches by daybreak, BUT it shows that temperatures in the upper atmosphere warm up so that a several hour mix of sleet and freezing rain is possible in PHL and immediate suburbs, from 6 am to 9 am before a return to all snow, ending about 1-2 pm.

The GFS model data won’t be available tonight until after my bedtime  🙂

Still too early to try to pin down storm totals. I’ll be updating tomorrow, so check back.