A large, multi-agency urban tracer and meteorological field experiment (Joint URBAN 2003) was held in Oklahoma City in July of 2003. Within the framework of the larger experiment, one block of an east-west running street with tall buildings on the north and south sides was instrumented with over fifty 2D and 3D sonic anemometers at street level, on towers, and at roof level. In this talk, we will give an overview of the instrument set-up in the Street Canyon experiment and present preliminary results. Initial analyses of wind sensor measurements indicate the presence of street-normal end vortices, significant spatial variability, pulsing of winds, and intermittency. Some measurement locations also show multi-peaked probability density functions for different components of the wind. In conjunction with tracer data collected from releases within the street canyon, this data will be used to better understand transport and dispersal mechanisms in street canyons and to evaluate the next generation of urban dispersion models.