source: By early on September 30, wind shear began to dramatically increase and a weakening trend began.
target: On September 30 the wind increased.
references: On September 30 the wind increased. By September 30, wind shear began to increase and weakening began. On September 30, wind shear began to rise and a weakening trend started. Early September 30, wind shear began to dramatically increase and a weakening trend began. By early September 30, wind shear increased and weakening began. On September 30, the wind got worse and then weakened. Wind changes went up then down beginning September 30. Early on September 30, wind shear began to increase dramatically and weakening trend started. Early on September 30, the wind began to change speed and direction.  A weakening trend began. Wind shear greatly increased early on September 30th and the storm began to weaken.