 The low tracked northwest through the Coral Sea to become Tropical Cyclone Vaughan early on 4 April.The system rapidly intensified to Category 2 during the morning of the 4th and tracked westward toward the north Queensland tropical coast.Cyclone Vaughan weakened a little during 5 April and was downgraded to a Category 1 system before re-intensifying to Category 2 early on 6 April.