In order for present dynamical models to produce realistic hurricane, they require constaints on the momentum and latent heat fluxes at high winds. As these constraints require a fundamental change in the fluxes from their known behaviour at lower winds (< 20m/s), the measurement of these fluxes is a primary goal of the CBLAST-hurricane program.

For the past 30 years, NOAA-AOC Orion WD-P3 aircraft have played a key role in hurricane research. As part of CBLAST, the turbulent gust probe system installed in the P3 nose as part of TOGA-COARE (1990) was operated, in addition to the NOAA/FRD BAT probe system, to obtain turbulent momentum flux. A fast response humidity package, incorporating the LICOR-7500, was added to obtain latent heat flux. Here we discuss the design and performance of the new sensor, and present initial estimates of latent heat flux in hurricanes from the 2003 field season.