State college in afd hinting at perhaps heavier amounts due to deformation zone for se areas. Perhaps some bonus snow.
Model Cycle and latest SREF indicates the potential for
2-3X the snowfall forecast for the far SE zones thanks to a
mesoscale deformation zone just to the north of a compact
700-500 mb closed low Sunday afternoon into early Sunday
evening. The SREF shows the nose of a -2 to -3 sigma, u-wind
anomaly (easterly LLJ) pointed right into that area. There will
be a very tight SSE to NNW gradient in snowfall within 20-30
miles north and south of the I-76 corridor. Will take the
measurable approach to gradually increase amounts across our far
SE zones (near and to the south of a KTHV to KLNS line Sunday
into Sunday evening), but still keep the bulk of Lancaster and
York counties below Winter Storm Warning criteria of 5 inches
for now.
BUFKIT time/height cross sections show a distinct second period
of moderate to briefly heavy snow from about 22Z Sunday to 04Z
Monday INVOF KLNS and points south from this potential
deformation snow band.