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Valliappa Lakshmanan
John S. Kain

. (2005) ) core with 4-km grid spacing and 35 vertical levels. The 2CAPS was produced at the Center for Analysis and Prediction of Storms at the University of Oklahoma (also using the ARW core) with 2-km grid spacing and 51 vertical levels. All three forecast systems used initial and lateral boundary conditions from the North American Model ( Rogers et al. 2009 ). The observations are from the stage II rainfall accumulation dataset produced by NCEP ( Baldwin and Mitchell 1998 ). The 1 June case

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Christopher A. Davis
Barbara G. Brown
Randy Bullock
, and
John Halley-Gotway

of the distributions of latitude and longitude of observed object centroids. Fig . A1. Interest functions for (a) centroid separation (solid, gray) and minimum boundary separation (dashed), both in km; (b) angle difference (°); and (c) area ratio (solid, gray) and area intersection ratio (dashed). Table 1. Configuration of numerical models: NAM, North American Model of NCEP; MYJ, Mellor–Yamada–Janjić ( Janjić 2002 ); and YSU, Yonsei University ( Noh et al. 2003 ). The WRF single-moment six

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