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1999–00 South Pacific cyclone season

1999–2000 South Pacific cyclone season
1999-2000 South Pacific cyclone season summary.jpg
Season summary map
Seasonal boundaries
First system formed September 5, 1999
Last system dissipated May 21, 2000
Strongest storm
Name Kim
 • Maximum winds 165 km/h (105 mph)
(10-minute sustained)
 • Lowest pressure 935 hPa (mbar)
Seasonal statistics
Total disturbances 25
Total depressions 20
Tropical cyclones 6
Severe tropical cyclones 4
Total fatalities At least 1 indirect
Total damage Unknown
Related articles
South Pacific tropical cyclone seasons
1997–98, 1998–99, 1999–00, 2000–01, 2001–02
Tropical depression (Australian scale)
Temporary cyclone south.svg 
Duration January 3 – January 6
Peak intensity 45 km/h (30 mph) (10-min)  1004 hPa (mbar)
Category 3 severe tropical cyclone (Australian scale)
Category 1 tropical cyclone (SSHWS)
TC Iris 08 jan 2000 1931Z.jpg Iris 2000 track.png
Duration January 6 – January 10
Peak intensity 150 km/h (90 mph) (10-min)  964 hPa (mbar)
Tropical depression (Australian scale)
Temporary cyclone south.svg 
Duration January 20 – January 26
Peak intensity 75 km/h (45 mph) (10-min)  996 hPa (mbar)
Category 3 severe tropical cyclone (Australian scale)
Category 1 tropical cyclone (SSHWS)
TC Jo 26 jan 2000 2322Z.jpg Jo 2000 track.png
Duration January 23 – January 27
Peak intensity 120 km/h (75 mph) (10-min)  972 hPa (mbar)
Category 4 severe tropical cyclone (Australian scale)
Category 3 tropical cyclone (SSHWS)
TC Kim 26 feb 2000 2010Z.jpg Kim 2000 track.png
Duration February 22 – February 29
Peak intensity 165 km/h (105 mph) (10-min)  935 hPa (mbar)
Tropical depression (Australian scale)
Temporary cyclone south.svg 
Duration February 28 – February 29
Peak intensity 65 km/h (40 mph) (10-min)  994 hPa (mbar)
Category 2 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
TC Leo 07 mar 2000 0252Z.jpg Leo 2000 track.png
Duration March 4 – March 8
Peak intensity 95 km/h (60 mph) (10-min)  985 hPa (mbar)
Category 3 severe tropical cyclone (Australian scale)
Category 1 tropical cyclone (SSHWS)
Mona Mar 9 2000 2215Z.jpg Mona 2000 track.png
Duration March 6 – March 11
Peak intensity 140 km/h (85 mph) (10-min)  960 hPa (mbar)
Tropical disturbance (Australian scale)
Temporary cyclone south.svg 
Duration March 9 – March 12
Peak intensity Winds not specified 

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.

It should also be noted that 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.

A disturbance was identified on 3 January at 0600 (UTC) near Espiritu Santo in Vanuatu. The storm was difficult to locate the general centre for the next couple of days, but on 6 January, it became more organised, while displaying midget characteristics. On 7 January at 2100 (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 20 knots (37 km/h), explaining the very small size of the cyclone. Iris intensified with 10-min winds increasing to 60 knots (110 km/h) on 8 January at 1200 (UTC). JTWC's estimated 1-min winds was 65 knots (120 km/h). 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 9 January, Iris began its weakening trend, while moving closer to Fiji. Iris was downgraded to a depression on 10 January, just 48 hours after it had reached its peak intensity. The final warning placed the centre on the Dateline 150 nmi (280 km) 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.

A disturbance was first identified over northern parts of Vanuatu on 19 January. It developed slowly, but deepened quickly on 22 January, and advisories were issued on the system on 23 January. It moved southward and was upgraded to Tropical Cyclone Jo on 24 January at 0300 (UTC). Jo moved to the south-east and attained storm force winds 15 hours after being named. The cyclone reached its peak intensity on 26 January at 0000 (UTC) located 650 km (400 mi) south of Nadi, with 10-min average winds of 60 knots (110 km/h). JTWC's peak 1-min average winds were 65 knots (120 km/h). Jo moved further to the south-east, and moved close enough to affect Fiji. Gusts to 50 knots (93 km/h) were recorded on Viti Levu on Fiji, even though Jo was about 445 km (275 mi) away from the Fiji. Flash flooding was reported, but there was no major river flooding. Cyclone Jo was declared extratropical on 28 January at 0600 (UTC) when located more than 1,000 nmi (1,900 km) east of North Island in New Zealand.


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