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Outline

1	Dual-Doppler Analysis of the Kinematic Structure of a Wasatch Mountain Winter Storm Justin A.W. Cox¹, W. James Steenburgh¹, David E. Kingsmill², Brian A. Colle³, Brad Smull⁴, Olivier Bousquet⁴ ¹NOAA Cooperative Institute for Regional Prediction and Department of Meteorology, Salt Lake City, Utah ²Desert Research Institute, Reno, Nevada ³SUNY Stonybrook, Stonybrook, NY ⁴The University of Washington, Seattle, WA
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3	Dual-Doppler synthesis DOW2 and DOW3 located approximately 18 km apart and 20 km away from the Wasatch mountains near Ogden NOAA P-3 flew cross-barrier stacks directly over the DOW dual-Doppler lobe with tail Doppler radar
4	View of the dual-Doppler area, from DOW2 site
5	Observed 24 hour precipitation
6	Low-level dual Doppler winds, 1832 UTC
7	Mid-mountain dual Doppler winds, 1832 UTC
8	Crest-level dual Doppler winds, 1832 UTC
9	Low-level dual Doppler winds, 2134 UTC
10	Along-Barrier Wind, A-B, 1832 and 2134 UTC
11	Along-Barrier Winds from DOWs and P-3
12	Cross-Barrier Wind, A-B, 1832 and 2134 UTC
13	Cross-Barrier Winds from DOWs and P-3
14	Mechanisms affecting near-mountain flow: Partial blocking and barrier jet processes: Marwitz (1987), Parish (1982), Dunn (1992), Bell & Bosart (1988) Frictional convergence at coastline (Roeloffzen et al. 1986) Pressure-driven channeling (Whiteman 2000) Smaller-scale processes
15	Conclusions Terrain-parallel flow observed at low levels Midlevel flow had a significant cross-barrier component Exceptions to climatological precipitation/elevation pattern: Enhanced precipitation in Ogden related to confluence zone Ben Lomond precipitation maximum related to orientation of mountain slope Future Work Detailed scale analysis of kinematics Modeling sensitivity studies