The United States Joint Typhoon Warning Center (JTWC) and Papua New Guinea National Weather Service also monitored systems within the basin during the season.

On 8 December, a cluster of clouds developed over the Timor sea and moved towards the south-east, following a large scale mid-latitude forcing event.

[1] Early on 11 January, the JTWC designated Laurence as 05S and initiated warnings on the cyclone with 1-minute windspeeds equivalent to a tropical depression.

[1] The JTWC kept Laurence at its peak intensity until 2000 WST (1200 UTC) the next day when they reported that the cyclone had become equivalent to a tropical depression.

[5] The remnants of Joy created a convergence zone along the central Queensland coast, with many locations around the Mackay region recording over 2000 mm of rain during the following week.

For a period of about one day, commencing 1000, 13 April, Tropical Cyclone Watch advices were issued for parts of the Pilbara and Kimberley coastline.

[7] During 7 May, the BoM and the JTWC started to monitor a Tropical Low that had developed, along the South Pacific Convergence Zone near the island of Bouganville.

[2][8][9] During 9 May, the BoM reported that Lisa had become a category 2 tropical cyclone, before the system peaked with 10-minute sustained windspeeds of 110 km/h (70 mph) during the next day.

[13] The system was subsequently designated as Tropical Cyclone 15P by the JTWC who issued two advisories on it, before it was last noted during the next day while it was located about 500 km (310 mi) to the northeast of Mackay, Australia.