 Typhoon Abby developed from an area of persistent convection to the southwest of Truk in early August . A tropical depression formed on August 13 to the southeast of Guam and was upgraded to a tropical storm a day after passing south of the island . Abby then steadily intensified to a peak of 95 kn ( 176 km / h ) but weakened before striking Taiwan . Typhoon Abby lashed the island with winds of 85 kn ( 157 km / h ) and heavy rains . Flooding on Taiwan killed 13 people , and agricultural damage totalled $ 81 million ( 1986 USD , $ 173 million 2013 USD ) . After departing Taiwan Abby continued north @-@ northeast before dissipating in the East China Sea . 
