The NCAR Mobile ISS (MISS) is a mobile version of the transportable NCAR Integrated Sounding System (ISS). The same instruments are available, including a 915 MHz boundary layer wind profiler with RASS temperature profiling, a GPS rawinsonde system, and surface instruments including wind speed and direction at 10 m, temperature, humidity and pressure at 2 m, and surface visible and IR radiation. While a standard ISS is deployed by a crew of 3 people in 2-3 days, MISS can be deployed by 2 people in about 30 minutes after arrival at a suitable site. Thus, while not a "chase" system, MISS does allow much greater flexibility in deployment. This presentation will describe the MISS system and present initial observations during field tests in eastern Colorado. Plans for the first formal deployment in the Sierra Wave experiment will also be described.