A low that moved from the Gulf of Carpentaria across the Northern Territory and northern Kimberley reached cyclone intensity off the Northwest Kimberley coast on 2 February. Jacob maintained a remarkably consistent west southwest track until 5 February keeping about 250 km off the Pilbara coast for much of this time. Jacob peaked at category three intensity on the morning of 5 February about 150 km off North West Cape. Jacob then slowed and weakened succumbing to increasing shear.
Gale-force winds were experienced at times in coastal areas along the Pilbara coast, however damage was minimal on land.
For more details see the TC Jacob Report (pdf)