Tongatapu. The storm rapidly developed on March 8 at 06:00 UTC, and was named Tropical Cyclone Mona six hours later, while located 75 km (45 mi) west of Haapai and moving slowly southward. A storm warning was put for the whole Tongatapu Group on the 8th. An eye developed on March 9, and Mona was upgraded to hurricane intensity at 0600 UTC, located 55 km (35 mi) west of Tongatapu. Mona moved south-southeastward and accelerated. It reached an intensity of on March 10, 370 km (230 mi) southeast of Tongatapu. NPMOC's 1-min winds were estimated at . Minimum pressure of Mona was 965 mbar. It began to weaken rapidly, as it sped off southwards, and became extratropical on March 11 at 12:00 UTC. In the Vavau and Haapai groups, there was damage to crops, particularly to banana and coconut plantations. There was moderate damage to houses and school buildings in Tongatapu. The unofficial damage assessment, according to the Tongan National Disaster Management Office, totalled Tongan $6 million. A police patrol boat sank off Eua Island in the Tongatapu group. Tropical Disturbance 16F Tropical Depression 17F (Vaughan) Tropical Disturbance 18F Tropical Cyclone Neil On April 12, RSMC Nadi started monitoring a tropical disturbance, that had developed within a trough of low pressure to the northeast of Fiji. During the next day the system moved southwestwards towards Fiji and developed into a tropical depression, as convention around the center increasing. At 17:00 UTC, it was named Tropical Cyclone Neil, located 150 km (90 mi) southeast of Kadavu. It moved slowly southward, but on April 16 at 12:00 UTC, it was downgraded to a tropical depression. Damage from Neil was minimal. Kadavu and Ono-i-Lau in Fiji reported gales from Neil, while torrential rain was experienced over some parts of Fiji. There was one fatality due to drowning, but not directly associated with the cyclone. Tropical Depression 20F Tropical Depression 21F Tropical Depression 22F Other systems On September 5, a tropical depression had developed in conjunction with a weak tropical wave about to the south-southeast of Port Vila in Vanuatu. During that day the depression moved slowly towards the southeast, while weakening due to the influence of north-westerly windshear, before the final advisory was issued during September 6. Tropical Disturbance 01F and 02F then developed towards the end of November, but remained weak and did not significantly develop. On December 1, Tropical Depression 03F