DISCUSSION...Isolated to widely scattered strong/severe storms have
developed over western NY as of 16z within an air mass characterized
by moderate MLCAPE and generally weak (at or below 25 kts) effective
shear values. Despite the lack of large-scale forcing, additional
thunderstorm development is anticipated over central portions of NY
and in the vicinity of a surface trough from the Delaware Valley
into southern New England as remaining weak MLCIN is removed through
daytime heating, with multiple multicell clusters moving generally
east/southeast this afternoon. A belt of enhanced westerly flow
averaging 35-40 kts will result in a risk for damaging downburst
winds with the stronger storms and clusters. Generally weak
deep-layer shear and poor mid-level lapse rates will temper the hail
risk, however a few stronger updrafts may be capable of marginally
severe hail.
Given the expected development, one or more Severe Thunderstorm
Watches is expected by early afternoon.