Jeff Duda, The problem with that is..stating probabilities of impact is confusing, time consuming, and it doesn't readily convey urgency or emergency. In a tornado situation, in order to save lives, stating a series of probabilities will do the opposite of what you're trying to do which is get people to move to shelter. I think the solution is to use those probabilities to draw the polygon, and then graphically show the highest risk areas with a filled in color like red. With GIS technology, and macros, this could be done in seconds, and allow instant updates which could be integrated with WARNGEN. This allows the quickest, and easiest manner for people to see exactly where the danger is. For NOAA Weather Radio, this could also be represented in the text of the warning., and follow up statements. (The areas in greatest danger from this storm include but are not limited to...Cityville...Anytown..& Readyville. Persons in these areas should move to safety immediately!) Keep it simple, and keep people safe.
I agree. I was giving an imaginary text product. Graphical would certainly be a better way to communicate a severe weather threat. Of course, what do you do for people who aren't by a TV or computer or who can't access internet?