...Northeast...
Within a broader area of cyclonic flow aloft, a leading shortwave
trough will move from the Lower Great Lakes into the Northeast, with
a 90 kt midlevel speed max and cooling aloft moving across NY and
parts of New England during the day. Low pressure will develop into
southern Quebec, with a cold front extending southward into the
region.
Surface heating and gusty south winds will bring 60s F dewpoints
into the area with up to 1000 J/kg MUCAPE expected. Relatively warm
profiles will develop near 300 mb, somewhat limiting storm depth.
However, ample midlevel cooling will still support sufficient
destabilization. Strong deep-layer shear and backed surface winds
ahead of the cold front will favor low-topped supercells. Cells
should develop over northern NY by 18Z, and will move quickly east,
producing marginal hail and sporadic damaging gusts initially. The
low EL height may mitigate hail production somewhat. By late
afternoon, a tornado or two will be possible as storms encounter a
stronger SRH environment farther east.