Mid-level flow across the twin tiers was moderately strong from the west.
A large-scale west-east frontal boundary was located just north of the twin tiers, however a series of more subtle boundaries were located over northern Pennsylvania and southern New York.
The BUF sounding indicated a moderately strong mid-level flow, and some dry air aloft.
Instability was forecast to be moderately high across central Pa, but fairly weak across southern NY.
Shear across the twin tiers was adequate for organized severe weather, CAPE was marginal.