Abstract The dataset contains vertical profiles from radiosondes launched by the University of Innsbruck, Department of Atmospheric and Cryospheric Sciences (ACINN) during the TEAMx winter Extended Observational Period (wEOP) at Kolsass in the Inn Valley Target Area (IVTA). Further details about the TEAMx Observational Campaign can be found in Lehner et al. (2026). Dataset description The TEAMx wEOP took place between 20 January and 28 February 2025. Radiosondes (GRAW DFM-09) were launched during selected Intensive Observational Periods (IOPs), typically at 3-h intervals, from the i-Box station VF0 (Rotach et al. 2017) near Kolsass in the Inn Valley, Austria. Longitude: 11.62219°E Latitude: 47.305341°N Elevation: 545 m MSL IOP Launch times (UTC) Test launch 2025/01/16: 13 wIOP1 2025/01/24: 14, 17, 20, 23 wIOP2 2025/01/27: 14, 17, 20, 23 2025/01/28: 02, 05 wIOP4 2025/01/30: 14, 17, 20, 23 2025/01/31: 02 wIOP6 2025/02/02: 14, 17, 20, 23 2025/02/03: 02, 05 wIOP9 2025/02/04: 08, 11, 14, 17, 20, 23 2025/02/05: 02, 05, 08, 11, 14, 17, 20, 23 2025/02/06: 02, 05 wIOP10 2025/02/08: 08, 11, 14, 17, 20 2025/02/09: 11 wIOP11 2025/02/14: 08, 11, 14, 18, 20 wIOP12 2025/02/17: 11, 14, 17, 20 wIOP13/14 2025/02/18: 17, 20, 23 2025/02/19: 02, 05, 08, 11, 14, 17 wIOP15 2025/02/20: 05, 08, 11, 14, 17 wIOP16 2025/02/21: 05, 08, 11, 14, 17 wIOP17 2025/02/25: 08, 11, 14 wIOP18 2025/02/26: 09, 11, 14, 17 No IOP 2025/02/28: 05, 08, 11 Variables Variable Units Z [coordinate] m MSL air_pressure Pa wind_from_direction degrees wind_speed m/s u_wind m/s v_wind m/s air_temperature K dew_point_temperature K air_potential_temperature K relative_humidity % humidity_mixing_ratio kg/kg latitude degrees longitude degrees elapsed_time s Contact For questions regarding the dataset, please contact manuela.lehner@uibk.ac.at. Acknowledgments The radiosonde launches were performed with the help of many students and staff members of ACINN. References Lehner, M et al. (2026) The TEAMx Observational Campaign, submitted to J Europ Meteorol Soc. ArXiv preprint arXiv:2606.12152, https://doi.org/10.48550/arXiv.2606.12152 Rotach MW, Stiperski I, Fuhrer O, Goger B, Gohm A, Obleitner F, Rau G, Sfyri E, Vergeiner J (2017) Investigating exchange processes over complex topography—the Innsbruck Box (i-Box). Bull Amer Meteorol Soc 98:787–805, https://doi.org/10.1175/BAMS-D-15-00246.1