The intersection point between two boundaries ( dry line , outflow boundary , cold front , etc.), often a focus for thunderstorm development.
Triple point also may refer to a point on the gust front of a supercell , where the warm moist inflow, the rain-cooled outflow from the forward flank downdraft , and the rear flank downdraft all intersect; this point is a favored location for tornado development (or redevelopment).