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David J. Purnell and Daniel J. Kirshbaum

locations of gauges, radars, and soundings used herein. Dashed line indicates the boundary between the United States and Canada. The Quillayute (QUIL), NPOL, and ECCC sounding sites, along with the Langley Hill (LH) and Camano Island (CI) radars, are indicated. (b) Annual precipitation estimated by PRISM, overlaid on terrain contours of 1, 500, 1000, and 2000 m. The larger, thickly outlined gauges over the Olympics are those selected for the gauge-denial verification experiments of section 3c . With

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Hannah C. Barnes, Joseph P. Zagrodnik, Lynn A. McMurdie, Angela K. Rowe, and Robert A. Houze Jr.

regions of high baroclinicity associated with fronts ( Chapman and Browning 1997 ; Wakimoto et al. 1992 ; Friedrich et al. 2008 ; Houser and Bluestein 2011 ). Studies, including Geerts and Miao (2010) and Houze and Medina (2005) , suggest that mountainous regions are especially conducive to the development of KH waves, since the terrain naturally creates or enhances vertical wind shear in stable flow. KH waves are important because of their transport of heat, momentum, and aerosols (e

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Joseph P. Zagrodnik, Lynn A. McMurdie, Robert A. Houze Jr., and Simone Tanelli

Dec 2015. Composited PPI scans of reflectivity at 0.5° azimuth from the Langley Hill (KLGX) and Whidbey Island (KATX) radars are included in the right column. The times in the left column match the black dots in the right column with the × denoting the starting time of the cross section. Colored diamonds denote the disdrometer site locations as in Fig. 1 . All of the APR-3 transects from the three prefrontal periods (as described in section 2a ) are aggregated into normalized Ku

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