TIMREX is a joint US-Taiwan multi-agency field program to be conducted in the plain and western mountain slope regions of southern Taiwan, coinciding with Taiwan's Southwesterly Monsoon Experiment -- 2008 (SoWMEX-08). TIMREX focuses on the multiple scale physics of heavy rain and flood producing convective systems, and their accompanying quantitative precipitation forecast/estimate (QPF/QPE) problems, in a complex environment influenced by the Mei-Yu front, southwesterly summer Monsoon, land-sea contrasts, and significant orography. The field program will span from 15 May through 30 June 2008. Correction of Timrex soundings is described in: Ciesielski, P. E., W.-M. Chang, S.-C. Huang, R. H. Johnson, B. Jong-Dao Jou, W.-C. Lee, P.-H. Lin, C.-H. Liu, and J. Wang, 2010: Quality controlled upper-air sounding dataset for TiMREX/SoWMEX: Development and corrections. J. Atmos. Ocean. Tech., 27, 1802-1821.