Here are CTP’s morning discussion thoughts.
Model convergence supports high POPs for a period of wet
snow over much of the forecast area between dawn Wednesday into
early afternoon, as southern stream shortwave lifts through.
The weak surface low is progged to track well south of the area,
keeping Pa in the cold air. However, marginal surface temps are
likely to result in elevation-dependent accumulations, with
ptype changing to light rain in the valleys toward midday.
Nearly all locations appear likely to see a small accumulation,
but confidence in county-wide advisory totals remains low, so
will hold off on headlines for now. Best guess of accumulations
based on ensemble mean qpf and thermal profiles ranges from 2-3
inches on the ridgetops to less than an inch in the lower
elevations of the Lower Susq Valley. Any slushy road surfaces
Wed morning should give way to wet roads by afternoon, due to
rising temps and increasing March sun angle.