Convective Available Potential Energy (CAPE)


CAPE value Convective potential
0 Stable
0-1000 Marginally Unstable
1000-2500 Moderately Unstable
2500-3500 Very Unstable
3500 + Extremely Unstable


Courtesy of Ohio State University, http://twister.sbs.ohio-state.edu/helpdocs/cape.html.