In addition to the named storms, the MFR tracked 11 tropical depressions or disturbances that did not intensify into a tropical storm. The agency did not issue any bulletins on eight of them. Of the remaining three, two formed in late December, and the other formed in mid-February. Tropical Depression B2, the longest-lasting of the depressions, formed after a month of activity. An area of convection developed in the Mozambique Channel, and the MFR believed it to be connected to the depression that formed on December 28 east of Madagascar. With a ridge to the east, the system tracked southward, but failed to intensify due to strong wind shear. While passing west of Réunion, the depression dropped heavy rainfall, totaling along the northern coast and about twice that amount in the mountainous interior. On December 31, the depression dissipated to the southwest of Réunion. On February 10, the JTWC tracked Tropical Cyclone 12S into the basin as a weakening tropical depression, which quickly dissipated. A few days later, the JTWC also tracked Tropical Cyclone 15S from February 14–17, which briefly intensified into a minimal tropical storm in the eastern portion of the basin.