This quarterly report for DE-FG26-04NT42030 covers a period from April 1, 2005 to June 31, 2005. GTI's activities during the report quarter were limited to administrative work. The work at the University of Arkansas continued in line with the initial scope of work and identified the questions regarding surface to cloud heat transfer as being largely responsible for the instability problems previously encountered. Drs. Havens and Spicer have successfully completed simulations at the required low wind speed of 2 m/s at 10 m elevation, with both D stability and F stability conditions, with the presence of LNG vapor release, but without the presence of dike/tank obstacle features.