 On November 20 , the JTWC began tracking Tropical Cyclone 04S a short distance southeast of Diego Garcia . The next day , MFR also initiated advisories on it , classifying the system as Tropical Depression A4 . After moving southwestward initially , the storm curved south @-@ southeastward and intensified . The JTWC estimated peak 1 ‑ minute winds of 85 mph ( 50 mph ) , and the MFR estimated 10 ‑ minute winds of 65 km / h ( 40 mph ) , indicating that it could have been named . While near peak intensity , the storm was affected by wind shear that displaced the circulation center along the north edge of the convection . The storm turned to the west , passing just south of St. Brandon before dissipating on November 29 . 
