Melanie was the first storm of the season to require cyclone watches, and warnings were issued for the Pilbara coast, but it had weakened into a low-pressure area before it made landfall.

[2] Early on 30 July, the tropical cyclone began to dissipate, so the JTWC issued their final advisory on the system on that day.

[15] Guba drifted erratically off the Queensland coast for the next two days, and intensified on 16 November, becoming a Category 3 severe tropical cyclone.

TCWC Brisbane downgraded Guba below tropical cyclone strength, and issued its last advisory early on 20 November.

The Rabaraba district in Milne Bay Province was also hit by flooding, with 30 houses and food gardens washed away, and forcing the evacuation of about 100 people.

The system then moved south-east, entering the area of responsibility of Perth's Tropical Cyclone Warning Centre, east of 90°E.

[22] The cyclone moved southwards, then turned to the south-west on 29 December and strengthened to a Category 2 (Australian scale).

[25] On 3 January at 11 am ACST (01:30 UTC) the TCWC in Darwin, Australia, located near the edge of their Area of Responsibility, with TCWC Perth, declared a Tropical Cyclone Warning for the coastal areas from Mitchell Plateau in Western Australia to the Daly River Mouth in Northern Territory with a Tropical Cyclone Watch declared for coastal areas from the Daly River Mouth to Goulburn Island which also included Darwin.

[25][29] During the afternoon of 4 January Tropical Cyclone Helen was steadily moving towards the east to the Daly River Mouth region.

At approximately 7 pm ACST (09:30 UTC) TCWC Darwin upgraded the intensity to 50 knots (Category 2), making landfall at Channel Point approximately 130 km southwest of Darwin at 10 pm ACST (12:30 UTC),[25][30] It soon started to weaken due to interaction with land and it weakened into a tropical low on 5 January as it had become less organised.

[37] The low then moved south-west for the next few days, where it proceeded to enter an area of high vertical wind shear, and began to rapidly weaken.

[40] The following day, the Joint Typhoon Warning Center (JTWC) issued its first advisory, designating the low as Tropical Cyclone 17S.

[43] On 12 February, the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert on the developing system.

[49] Nicholas squirmed around Western Australia before finally making landfall north of Carnarvon on 20 February.

[51] The cyclone caused gales over the North West cape in Western Australia, and the town of Exmouth was on high alert.

The low strengthened as it moved off the Kimberley coast, and was upgraded to Tropical Cyclone Ophelia by TCWC Perth.

The JTWC briefly upgraded Ophelia to a Category 1 cyclone on the Saffir–Simpson scale later that day, but was downgraded to a tropical storm on the next advisory.

Ophelia continued on a general south-westerly track parallel to the coast, and eventually weakened out to sea as TCWC Perth discontinued advisories.

[73][74] During 21 April, convection surrounding the system rapidly developed in generally favourable conditions and organized around a low level circulation centre.

[75] As Rosie moved into TCWC Perth's area of responsibility, both TCWC Perth and the JTWC reported that the system had peaked with windspeeds of 95 km/h (59 mph), which meant that it was a category two tropical cyclone on the Australian scale and equivalent to a tropical storm on the SSHS.

[74][75] After it had been named, Rosie weakened into a category one tropical cyclone with the low level circulation centre became devoid of convection as it moved towards the south-southeast towards Christmas Island.

[75] However convection redeveloped over the system later that day, but failed to become sustained or organized, as a result TCWC Perth reported early on 23 April, that Rosie had weakened into a tropical low despite it having 10-min windspeeds of 65 km/h (40 mph).

[75] During its lifetime, the only area that Tropical Cyclone Rosie affected was Christmas Island which recorded 52.8 mm (2.08 in) of rain between 21 and 23 April.

[75] Early on 22 April, heavy swells of between 5–7 metres (16–23 ft) affected Christmas Island, and caused some damage facilities on the shore and tore a mooring from its anchor.

As the system developed into a category one tropical cyclone, it moved into TCWC Jakarta's area of responsibility who named it Durga.

[78] However, by January 2008, a fifth TCWC in Jakarta, Indonesia had become operational and subsequently in April 2008 named Tropical Low 23U, Durga.