Cold-air funnel clouds MISC@1 funnel clouds -LRB- vortices -RRB- are usually short-lived and generally much weaker than the vortices produced by supercells .

Cold-air funnel clouds Cold-air -LRB- or cold-core -RRB- funnel clouds are usually short-lived and are usually much weaker in strength than the tornadoes produced by supercells .
