To investigate impacts of initialization through DA with GSI in HWRF, three sets of cycle forecast experiments of Typhoon Meranti (2016) were conducted. Each set contains 15 five-day forecast experiments. The HWRF configuration is almost the same as the recent operational HWRF (H217). One set includes a HWRF cycle run which includes vortex initialization without GSI (CTL), second run is HWRF with hybrid-GSI (HGSI), and third is HWRF with hybrid-GSI and high-resolution AMV derived from Himawari-8 (HGSI-AMV).
Preliminary verification shows that HGSI-AMV produced the smallest track errors for forecast hours 108-120 among the experiments and HSGI-AMV was better than HGSI for all lead times, indicating that assimilation of AMV is a promising way to further improve track forecasts. Detailed differences in TC development and structure among the three experiments will be presented.