5A.4 Polarimetric Variability of Supercell Storms in Similar Environments

Tuesday, 15 September 2015: 2:15 PM
University AB (Embassy Suites Hotel and Conference Center )
Matthew S. Van Den Broeke, Univ. of Nebraska, Lincoln, NE
Manuscript (449.9 kB)

Handout (1.3 MB)

Changing environments, including the vertical profiles of wind and moisture, may alter the mixing ratio and distribution of several hydrometeor species in supercell storms. As a result, polarimetric radar signatures are expected to vary as a function of these environmental conditions. Critical to the development of a study in which such variability is investigated, however, is an understanding of how polarimetric radar signatures may vary between supercell storms in similar environments. In this work, an analysis will be presented of the variability of common supercell signatures (ZDR arc magnitude and placement, ZDR column magnitude and altitude, low-level hail fallout signature, and small-drop-dominant distributions) among a sample of spatiotemporally proximate, isolated supercell storms. Subsets of storms analyzed will include tornadic and non-tornadic right-moving storms, and left-moving storms.
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