Evaluation of shear-relative hurricane structure from the HWRF model

This talk will present a composite-based analysis of shear-relative hurricane structure from the HWRF model. The model's representation of shear-relative precipitation and kinematic structure are evaluated using a recently-published composite of such structure diagnosed from airborne Doppler radar. Results stratified by shear magnitude, motion direction and vortex intensity are examined in addition to the total-case composite. Differences between the model and observed shear-induced asymmetries, including the vortex tilt, are interpreted in the light of differences in the typical environmental and symmetric vortex properties of the respective databases. Given the availability of HWRF model output at regular intervals, the talk is concluded with a composite-based examination of the relationship between temporal changes in vortex tilt and changes in hurricane structure and intensity.