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To fulfill an objective of the ROSES-2008 A.19, a new application is proposed that will support aviation?s Next Generation Air Transportation System (NextGen), primarily for transoceanic flights where traditional, ground-based data sources are lacking. Satellite-based measurements will be investigated to identify convective hazards and to improve the diagnosis and nowcast of oceanic convection. This study will build upon the Oceanic Convection Diagnosis and Nowcasting effort, funded by ROSES 2006 with Cathy Kessinger as a co-principal investigator. Starting from the oceanic convective diagnosis product, an aviation hazard metric will be developed to include such information as updraft strength, total lightning flash density, ice content, turbulence, precipitation and aircraft icing. Data from the Tropical Rainfall Measuring Mission (TRMM) satellite will be utilized. With future launches of the Global Precipitation Measurement (GPM) and Geostationary Operational Environmental Satellite R-Series (GOES-R) satellites planned to carry sensors similar to the TRMM Microwave Imager (TMI), Precipitation Radar (PR) and Lightning Imaging Sensor (LIS), we also propose to investigate optimal use of satellite measurements of total lightning, brightness temperatures and ice water path to further improve the diagnosis and nowcasting of oceanic convection. Brightness temperatures and ice water path (e.g., derived from TRMM, Blyth et al. 2001 and Petersen et al. 2005) are uniquely related to total lightning activity, an aviation hazard. Techniques developed by Donovan et al. (2007) for using TRMM data to validate the convection diagnosis products will be utilized. Furthermore, investigation into potential relationships between total lightning measurements and convectively-induced turbulence (another aviation hazard) will be undertaken to determine their potential use for global turbulenc e detection. Here, we can draw from collaborations with Drs. John Williams and Robert Sharman, NCAR, to facilitate understanding and verification based on data sets of turbulence occurrence and intensity collected over the continental United States and surrounding waters.