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Tammy M. Weckwerth and Ulrike Romatschke

was used to distinguish between hydrometeor types at each radar gate ( Vivekanandan et al. 1999 ). A beam blockage algorithm was used to account for the propagation effects and the convolution of the beam pattern with the terrain features. Prior validation with rain gauges showed a high correlation coefficient of 0.834, providing confidence in this enhanced QPE algorithm ( Dixon et al. 2015 ). Fig . 1. Precipitation (mm) shown for 11 Jun 2015 at (a) 0000, (b) 0100, (c) 0200, and (d) 0300 UTC

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Dylan W. Reif and Howard B. Bluestein

effects of sea/land breezes. The warm season, defined here as April–July, was chosen because much of the nocturnal convection over the Great Plains occurs during that time period ( Wallace 1975 , Fritsch et al. 1986 ). To identify the CI events, 2 radar composite data were examined from the UCAR MMM radar composite archive (available online at http://www2.mmm.ucar.edu/imagearchive/ ). The radar data are available in 30-min intervals for most days and only the central and southern Great Plains were

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