The Maritime Continent Thunderstorm Experiment (MCTEX) took place from 13 November to 10 December, 1995 on the Tiwi Islands , Australia. The primary objective of the experiment was to study the lifecycles of the thunderstorms which occur almost daily on these islands during the transition from wet and dry seasons. This study is concerned with the cirrus anvil outflow and the impact of these storms on the radiation budget. As part of MCTEX, a suite of remote sensing instruments, including a dual-wavelength millimeter radar, a 10-cm vertically pointing radar, and broad-band solar and IR radiometers were deployed at Garden Point located on the northwest corner of the Tiwi Islands. A scanning C-band Doppler radar was also located in Nguiu approximately 50km to the south of Garden Point. The combination of the detailed measurements over the Garden Point site, and the 3-d sampling through time of the entire cloud system by the scanning radar allow for an anlysis of the areal extent, depth, microphysical properties and radiative effects of the cloud system. This study examines several case studies in order to describe the typical lifecycle of the cirrus anvil outflow of these island generated thunderstorms and investigates the radiative impact at different stages of develpoment using a two-stream rdiative transfer model and an independent pixel approach