SPC thinks you’re right.
Concerning...Severe potential...Watch likely
Valid 131648Z - 131815Z
Probability of Watch Issuance...80 percent
SUMMARY...Scattered storms developing will pose a risk for damaging
winds and severe hail this afternoon/evening. A severe thunderstorm
watch will likely be issued in the next hour.
DISCUSSION...Visible satellite shows morning clearing has given way
to widespread cumulus development across the region. Surface
temperatures have warmed into the low to mid 80s F amid rich
low-level moisture characterized by dew point temperatures in the
low to mid 70s F. This has led to rapid destabilization, with MLCAPE
values of 1500 J/kg being analyzed across the region, and
approaching 2000-2500 J/kg across portions of south-central
Pennsylvania. Isolated storms are already beginning to develop, with
a severe/maturing convective cell noted in central New York.
This trend is expected to continue, with scattered storms expected
across the region by early to mid afternoon. With effective bulk
shear of 35-40 kt, storms should organize into a mixture of
multicells and supercells, posing a risk for mainly damaging winds
and some severe hail, and a tornado or two is possible. Given these
trends, a severe thunderstorm watch will likely be needed for the
region in the next hour or so.