[1][2] On December 11, the JTWC started to monitor an area of disturbed weather had developed within a trough of low pressure, about 670 km (415 mi) to the northeast of Honiara in the Solomon Islands.

Bulletins from Nadi alluded to gales being present in the southern and eastern quadrants, but since they were not surrounding the center, the depression was not named as a tropical cyclone.

Although Dani never threatened to strike Fiji, its outer bands brought catastrophic rainfall to the nation, killing 12 people and leaving US$3.5 million in damage behind.

[5] On February 9, the FMS reported that a tropical depression had developed within a monsoon trough, about 210 kilometres (130 mi) to the south of Honaira on the Solomon Island: Guadalcanal.

During February 10, 19P started to move towards the southeast while developing further before the FMS named the depression as Ella early the next day, before it turned and accelerated towards the south and passed about 160 km (100 mi) to the west of the northern tip Espiritu Santo.

[6] On February 25, the FMS started to monitor a weak shallow depression that had developed within the South Pacific Convergence Zone just to the north of the Southern Cooks Islands.

Early on March 11, the NPMOC and the FMS started to monitor a tropical disturbance that had developed within the South Pacific Convergence Zone between the Southern Cook Islands and French Polynesia.

[1][7] Later that day as the disturbance moved towards the southwest, the FMS reported that it had developed into a tropical depression while located about 485 km (300 mi) to the east of the Cook Island: Aitutaki.

[8] Under the influence of diurnal effects and significant vertical shear the depression slowly developed over the next couple of days while drifting through the southern Cook Islands.

[8] By 1800 UTC on January 12, the depressions low level circulation centre had moved under the deep convection, as result the FMS then reported that the system had developed into a tropical cyclone and named it Hali.

[7] Over the next 3 days, Hali moved towards the west as it gradually intensified further, before early on March 16, an approaching upper trough of low pressure caused a weakness in the subtropical ridge.

[7][10] Later that day the FMS reported that the cyclone had started to rapidly weaken because of increasing vertical windshear and cooler sea surface temperatures, and interference from Tropical Depression 20F.

[8] Over the next couple of days the disturbance moved towards the west-southwest and was classified as a tropical depression early on March 15, while it was located about 160 km (100 mi) to the northwest of Tahiti.

The first, Tropical Disturbance 01F, developed about 540 km (340 mi) to the northwest of Apia in American Samoa, however the system remained weak and was last noted later that day.

[13] Along with Cyclone Dani, 08F extended a trough of low pressure on to Fiji which caused significant flooding, 6 deaths and about 4 million (1999 FJD) worth of damage.