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Colloquium

Department of Atmospheric Science

Thur., Apr. 19, 3:10 pm, EN6085

Hail Science: Radar-Based Hail Sizing and Hail Physics Modeling

Dr. Matthew R. Kumjian

The Pennsylvania State University

Abstract

Each year, hailstorms inflict billions of dollars in damage to homes, property, and agriculture. Despite their frequent occurrence and large socioeconomic impacts, anticipation of the precise hail threat posed by storms on a given day conducive to severe convection is highly difficult. Further, radar-based hail sizing remains a challenge. This talk will provide an overview of ongoing research into some of these problems, which we tackle using dual-polarization radar observations, detailed electromagnetic scattering calculations, and idealized storm-scale numerical modeling. Research topics to be discussed are (i) polarimetric radar and environmental characteristics of storms that produce large accumulations of small hail, (ii) radar scattering characteristics of natural hailstones, and (iii) idealized simulations of hail growth trajectories to elucidate the environmental controls on hail size. The overarching goal of this research is to provide better understanding of hail processes, ultimately leading to improvements in the anticipation and detection of these high-impact weather events


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University of Wyoming,

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