Despite rapid initial cloud growth, it took a little time for the cell in Custer Co. to mature. Before any type of warning was being considered, a 90% ProbSevere showed up before lowering to ~30%. While working on another monitor, the ProbSevere jumped back to ~90% which grabbed our attention and ended up leading to a warning being issued. We issued an SPS about 7 minutes prior.

Working in this environment of cells vs lines, it’s easy to see ProbSevere is much more accurate.