Dr. Chen’s research interests are in studying the dynamics of severe weather phenomena, in particular hurricanes and convective storms, and in improving their predictions. Specific topics such as cyclogenesis, rapid intensity change, mesoscale structures of hurricanes, the initiation and evolution of severe storms, and their interactions with the synoptic-scale and smaller-scale flows are investigated through observations and numerical modeling. Advanced multi-scale data assimilation techniques are designed and utilized not only as powerful research tools, but also as methods to improve severe weather predictions by assimilating critical in-situ and remote-sensing observations into the models.