The 1999–2000 South Pacific tropical cyclone season was an event in the annual cycle of tropical cyclone formation and ran from November 1, 1999, to April 30, 2000, in the South Pacific. The regional tropical cyclone operational plan defines a "tropical cyclone year" separately from a "tropical cyclone season", with the "tropical cyclone year" for this season lasting from July 1, 1999, to June 30, 2000. All of the six named storms affected land in some way, but no major damage was reported from any of the storms. Seasonal summary Systems Tropical Depression 06F Severe Tropical Cyclone Iris A disturbance was identified on January 3 at 06:00 (UTC) near Espiritu Santo in Vanuatu. The storm was difficult to locate the general centre for the next couple of days, but on January 6, it became more organised, while displaying midget characteristics. On January 7 at 21:00 (UTC), it was named Tropical Cyclone Iris, located 330 km (205 mi) northwest of Port Vila, moving southeast. In Vila, 110 km (70 mi) away from Iris's centre, recorded winds of only up to , explaining the very small size of the cyclone. Iris intensified with 10-min winds increasing to on January 8 at 12:00 (UTC). JTWC's estimated 1-min winds was . There were some indications that Iris could be far more intense than what the warning centres estimated, mainly due to its small size. Iris accelerated eastward, leaving Vanuatu. On January 9, Iris began its weakening trend, while moving closer to Fiji. Iris was downgraded to a depression on January 10, just 48 hours after it had reached its peak intensity. The final warning placed the centre on the Dateline southeast of Fiji. Fresh to strong winds and very rough seas were experienced over the western and southern parts of Fiji. Overall damage was minimal. Cyclone Iris was most notable for its rapid strengthening in its early stages, followed by its rapid decay. Tropical Disturbance 07F Tropical Depression 08F Severe Tropical Cyclone Jo A disturbance was first identified over northern parts of Vanuatu on January 19. It developed slowly, but deepened quickly on January 22, and advisories were issued on the system on January 23. It moved southward and was upgraded to Tropical Cyclone Jo on January 24 at 03:00 (UTC). Jo moved to the south-east and attained storm force winds 15 hours after being named. The cyclone reached its peak intensity on January