 Tropical Cyclone Herbie originated from an area of low pressure on 17 May 1988 northwest of the <unk> Islands . Later that day , the Australian Bureau of Meteorology began monitoring the system as a tropical low . Several hours after , the Joint Typhoon Warning Center ( JTWC ) classified the system as Tropical Depression <unk> , having attained winds of 45 km / h ( 30 mph 1 @-@ minute sustained ) . Following slight development , the system intensified into a Category 1 cyclone and was given the name Herbie by the Australian Bureau of Meteorology early on 18 May . Several hours after being named , the storm attained its initial peak intensity with winds of 75 km / h ( 45 mph 10 @-@ minute sustained ) and a barometric pressure of 990 hPa ( mbar ) . 
