Lately, the NWS-TUC has been also providing side-bar "Weather Story"
matrices showing *how* they arrived at their weather severity/probability forecasts, using a matrix similar to this example:
The *key* here is exactly as
kcidwx mentions above: final result is the product of two values, A =
probability and C =
confidence, severity, impact, etc.. [ NOTE: often called a Risk Matrix ]
Unfortunately, what they DON'T tell us is what the numerical values are for the A and C groupings.