 Ingrid remained a tropical storm until September 15 , when it weakened to a tropical depression due to high shear from a strong tropical upper tropospheric trough . Gradual weakening continued as it passed northeast of the Leeward Islands . Ingrid briefly reorganized on September 16 , before weakening further and degenerating into an open wave early on September 17 . The remnants turned northwestward within the low @-@ level steering flow , and dissipated on September 18 without redevelopment . There were no reports of damage or casualties associated with Ingrid because the storm never threatened land . 
