▁waves . ▁On ▁the ▁next ▁day , ▁the ▁M FR ▁estimated ▁peak ▁wind s ▁of ▁ 1 5 0   km / h ▁( 9 0   m ph ), ▁while ▁the ▁J TW C ▁estimated ▁wind s ▁of ▁ 1 8 5   km / h ▁( 1 1 5   m ph ). ▁In grid ▁turned ▁to ▁the ▁sout heast ▁and ▁weak ened , ▁becoming ▁extr at rop ical ▁on ▁March   1 . ▁ ▁Se vere ▁Trop ical ▁Storm ▁J osta ▁ ▁An ▁extended ▁series ▁of ▁low ▁pressure ▁areas ▁spawn ed ▁what ▁would ▁become ▁Trop ical ▁Storm ▁J osta ▁on ▁March   5 ▁near ▁the ▁Com or os ▁in ▁the ▁northern ▁Moz amb ique ▁Channel . ▁It ▁initially ▁dr ift ed ▁west ward ▁while ▁slowly ▁organ izing , ▁becoming ▁a ▁tropical ▁storm ▁on ▁March   7 . ▁On ▁that ▁day , ▁the ▁J TW C ▁class ified ▁J osta ▁as ▁Trop ical ▁Cy clone ▁ 1 6 S . ▁On ▁March   8 , ▁J osta ▁approached ▁the ▁coast ▁of ▁Moz amb ique ▁within ▁ 9 0   km ▁( 5 5   mi ) ▁of ▁P emb a ▁before ▁turning ▁ab rupt ly ▁to ▁the ▁east - s out heast . ▁The ▁con ve ction ▁fl uct u ated ▁in ▁intensity , ▁eventually ▁becoming ▁better ▁organized ▁on ▁March   9 . ▁That ▁day , ▁an ▁eye ▁feature ▁formed ▁in ▁the ▁center ▁of ▁the ▁con ve ction , ▁and ▁the ▁M FR ▁estimated ▁peak ▁wind s ▁of ▁ 1 0