J2.1 Defining High-Impact Weather—or Not?

Monday, 25 June 2007: 10:45 AM
Summit AB (The Yarrow Resort Hotel and Conference Center)
Ron McPherson, AMS, Boston, MA

In a case several years ago, a Justice of the U.S. Supreme Court was famously quoted as saying “I can't define pornography, but I know it when I see it”. Something similar might be said about defining high-impact weather: it is difficult to define, but most of us recognize it when it occurs. This paper explores the many dimensions and characteristics of high-impact weather that simultaneously make it difficult to define and yet easily recognizable.
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