Severe Tropical Cyclone Gwenda was tied Connect with Cyclone Inigo as the most intense Australian tropical cyclone Catastrophe on record ( with the possible exception of Cyclone Mahina ) , with a barometric pressure of 900 hPa ( mbar ) and was the most intense storm Catastrophe worldwide in 1999 .

Forming Coming_to_be out of a tropical disturbance over the Arafura Sea on 2 April 1999 , the precursor to Gwenda tracked Motion slowly westward and gradually became Becoming more organised .

On 4 April , the system developed Coming_to_be into a Category 1 cyclone Catastrophe and was named Name_conferral Gwenda .

Increasing Cause_change_of_position_on_a_scale wind shear and an acceleration Cause_change_of_position_on_a_scale in forward speed caused Causation Gwenda to quickly weaken .

After moving Motion ashore , Gwenda abruptly stalled before dissipating Change on 8 April .

Following its usage , the name Gwenda was retired GiveUp at the end of the season .