||This is one of the upper air sounding data sets developed for the Upper Missouri River Basin Pilot Project (UMRBPP) conducted from 05 April to 05 May 1999. The UMRBPP domain extends from 90W to 115W longitude and 36N to 51N latitude. Included in this data set are 17 National Weather Service (NWS) rawinsonde stations in the UMRBPP domain. The soundings were typically released at 00 and 12 UTC, however, several stations had additional releases. The final data set contains pressure, dry bulb temperature, dew point temperature, relative humidity, wind speed and direction, at 6-sec vertical resolution. Consult the readme file for further information.