After preliminary measurements proved that it is feasible to collect vertical profiles of wind speed and direction within and above an urban domain with an LDV system, several new data sets have been obtained in the El Paso CBD. Rather than a street canyon site, a parking lot area located in downtown El Paso, TX was selected as the long term measurements site. During July and September 1996, February 1997 and April 1998, a Laser Doppler Velocimeter (LDV) was operated to remotely sense the vertical structure of wind fields with time within and above the CBD.for four distinct 24 hor periods. Data was collected from 0700 hours to 0700 hours the next morning to document the diurnal cycle. Values of u,v, and w wind components were measured and analyzed and the mean speed and direction were computed for every 5 meters up to 125 meters and then every 10 meters up to 350 meters. Each vertical profile required 3.5 minutes to be sensed, calculated, and stored. A micrometeorological station was also operated for reference data in the surface layer at the 10 meter level near the LDV. Additional meteorological measurements were obtained from fixed stations operated by several air quality groups along with upper air soundings from the El Paso airport site. A combined set of 10 stations were obtained. Average value profiles were computed using up to 7 profiles for analysis of time-averaged profiles. The four 24 hour data sets were collected during different synotic conditions: convection, subsidence, frontal zone, and tight pressure gradient. In all cases, a significant loss of momentum was exhibited in the urban layer and to a lesser, but notable degree, in the roughness layer immediately above the building tops. Behavior of wind speed from case to case clearly showed a major reduction in the building layer, while attaining near uniform values well above the CBD. Directional effects of the wind usually reflected the upwind positioning of the buildings as well as gaps between the buildings. Above the roughness layer, both speed and direction were 'not changing' with height.