Northeast...
Weak to moderate instability is forecast to develop across the
Northeast through mid afternoon as the airmass continues to
destabilize. Midday surface analysis indicates temperatures are
warming into the 80s with dewpoints in the upper 60s to lower 70s.
As the cold front advances east into this uncapped airmass,
scattered thunderstorms should develop. Shear of 30 to 35 knots and
relatively long/straight hodographs will support the potential for
supercells. Weak mid-level lapse rates will be the primary limiting
factor for large hail, but the overall favorable shear with strong
venting aloft and potential supercells may support some isolated
large hail.
Damaging wind gusts will be the primary threat, both from initial
cells and also from any clusters which develop. Any stronger
clusters with bowing segments could support a better organized
damaging wind swath. The greatest wind damage threat will likely
exist from western Massachusetts to far southern Maine.