1986–87 South Pacific cyclone season
| First system formed |
November 20, 1986 |
| Last system dissipated |
May 22, 1987 |
| Strongest storm1 |
Uma – 940 hPa (mbar), 165 km/h (105 mph) (10-minute sustained) |
| Total depressions |
13 |
| Tropical cyclones |
12 |
| Severe tropical cyclones |
5 |
| Total fatalities |
50 |
| Total damage |
$150 million (1986 USD) |
| 1Strongest storm is determined by lowest pressure |
South Pacific tropical cyclone seasons
1984–85, 1985–86, 1986–87, 1987–88, 1988–89
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| Related articles |
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The 1986–87 South Pacific cyclone season was an event in the annual cycle of tropical cyclone formation. A total of 13 tropical cyclones developed during the season.
Seasonal summary
During the season twelve tropical cyclones were recorded within the South Pacific basin, which was considered above average when compared to an 18-year average of 10 systems.[1][2]
Storms
Tropical Cyclone Osea
| Category 2 tropical cyclone (Australian scale) |
| Tropical storm (SSHWS) |
|
|
| Duration |
November 20 – November 25 |
| Peak intensity |
100 km/h (65 mph) (10-min) 980 hPa (mbar) |
Tropical Cyclone Osea formed about 565 km (350 mi) to the north-northeast of Port Vila on 21 November. It moved on a southerly track parallel to Vanuatu and spent most of its time over the sea. No significant damage was reported.
Tropical Cyclone Patsy
| Category 2 tropical cyclone (Australian scale) |
| Tropical storm (SSHWS) |
|
|
| Duration |
December 12 – December 22 |
| Peak intensity |
100 km/h (65 mph) (10-min) 975 hPa (mbar) |
On December 12, TCWC Nadi started to monitor a tropical depression that had developed about 1,000 km (620 mi) to the north-northwest of Suva, Fiji.
The system affected Northern Vanuatu but caused little or no damage to the island nation.[3]
Severe Tropical Cyclone Raja
| Category 3 severe tropical cyclone (Australian scale) |
| Category 2 tropical cyclone (SSHWS) |
|
|
| Duration |
December 21 – January 5 |
| Peak intensity |
150 km/h (90 mph) (10-min) 955 hPa (mbar) |
Cyclone Raja existed from December 21, 1986 to January 5, 1987.
Severe Tropical Cyclone Sally
| Category 3 severe tropical cyclone (Australian scale) |
| Category 1 tropical cyclone (SSHWS) |
|
|
| Duration |
December 26 – January 6 |
| Peak intensity |
150 km/h (90 mph) (10-min) 955 hPa (mbar) |
Cyclone Sally existed from December 26, 1986 to January 6, 1987.
Severe Tropical Cyclone Tusi
| Category 3 severe tropical cyclone (Australian scale) |
| Category 3 tropical cyclone (SSHWS) |
|
|
| Duration |
January 13 – January 25 |
| Peak intensity |
150 km/h (90 mph) (10-min) 955 hPa (mbar) |
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On January 13, TCWC Nadi started to monitor a tropical depression that had developed, within a trough of low pressure near the island nation of Tuvalu.[4] Over the next few days the system gradually developed further before it was named Tusi during January 16, after it had become equivalent to a modern-day category 1 tropical cyclone on the Australian tropical cyclone intensity scale. After being named the system gradually intensified as it moved southeastwards along the trough, between the islands of Fakaofo and Swains during January 17. Tusi's eye subsequently passed near or over American Samoa's Manu'a Islands early the next day, as the system peaked in intensity with 10-minute sustained wind speeds of 150 km/h (90 mph). The system subsequently posed a threat to the Southern Cook Islands, however this threat gradually diminished as Tusi moved southwards and approached 25S during January 20.
Severe Tropical Cyclone Uma
| Category 4 severe tropical cyclone (Australian scale) |
| Category 1 tropical cyclone (SSHWS) |
|
|
| Duration |
February 4 – February 10 |
| Peak intensity |
165 km/h (105 mph) (10-min) 940 hPa (mbar) |
Cyclone Uma existed from February 4 to February 10.
Tropical Cyclone Veli
| Category 1 tropical cyclone (Australian scale) |
| Tropical depression (SSHWS) |
|
|
| Duration |
February 7 – February 9 |
| Peak intensity |
85 km/h (50 mph) (10-min) 987 hPa (mbar) |
The precursor tropical low to Cyclone Veli formed within the Australian region on February 5, about 725 km (450 mi) to the south-east of Port Moresby in Papua New Guinea.[5] During the next day the low moved eastwards and gradually developed further, before it became equivalent to a category 1 tropical cyclone on the Australian scale, as it reached its 10-minute sustained windspeeds of 85 km/h (55 mph).[5] As the system continued to move eastwards it crossed 160°E and moved into the South Pacific basin during February 7, before TCWC Nadi named it Veli later that day on the basis of satellite derived evidence.[5][6] During that day the system continued to move eastwards, before as it passed near to Espitru Santo, Veli started to move steadily towards the south-east.[6] Early the next day the JTWC initiated advisories and started to monitor Veli as Tropical Cyclone 16P, with peak 1-minute sustained windspeeds of 45 km/h (30 mph).[7][8] During that day strong upper level north-westerlies caused vertical windshear to increase over Cyclones Veli and Uma and thus weakened them.[6] During February 9, Cyclone Veli absorbed Uma and formed a complex low, which moved slowly south-eastwards and became extratropical.[6] Damage within Vanautu was either minimal or went unreported, as the island nation was more concerned with the aftermath of Cyclone Uma.[9]
Tropical Cyclone Unnamed/19P
| Category 2 tropical cyclone (Australian scale) |
| Tropical storm (SSHWS) |
|
|
| Duration |
February 28 – March 3 |
| Peak intensity |
95 km/h (60 mph) (10-min) 985 hPa (mbar) |
Severe Tropical Cyclone Wini
| Category 3 severe tropical cyclone (Australian scale) |
| Category 1 tropical cyclone (SSHWS) |
|
|
| Duration |
February 27 – March 7 |
| Peak intensity |
130 km/h (80 mph) (10-min) 965 hPa (mbar) |
Cyclone Wini existed from February 27 to March 7.
Severe Tropical Cyclone Yali
| Category 3 severe tropical cyclone (Australian scale) |
| Category 1 tropical cyclone (SSHWS) |
|
|
| Duration |
March 5 – March 11 |
| Peak intensity |
120 km/h (75 mph) (10-min) 970 hPa (mbar) |
On March 5, TCWC Nadi started to monitor a shallow tropical depression, that had developed about 485 km (300 mi) to the southeast of Honiara, on the Solomon Island of Guadalcanal.[10][11] Over the next 3 days the system remained as a shallow depression as it moved southwards, before it started to rapidly develop into a tropical cyclone underneath an upper level ridge of high pressure.[10][12] During March 8, the JTWC classified the system as Tropical Cyclone 22P and initiated advisories on the system, while TCWC Nadi named it Yali after it had become equivalent to a modern-day category 1 tropical cyclone on the Australian scale.[7][10] During the next day Yali continued to intensify before as the ridge of high pressure moved northwards, TCWC Nadi and the JTWC reported that Yali had peaked with 1 and 10-minute sustained windspeeds of 120 km/h (75 mph).[5][11][12] This made it equivalent to a category 3 severe tropical cyclone on the Australian tropical cyclone intensity scale and a category 1 hurricane on the Saffir-Simpson hurricane scale.[5][11] During the next day Yali rapidly weakened and dissipated over water, before it was last noted by the JTWC and TCWC Nadi during March 11.[5][10][11] Despite being within the vicinity of both Vanuatu and New Caledonia, the system did not pass close enough to affect or cause any damage to any inhabited islands.[10][9]
Tropical Cyclone Zuman
| Category 2 tropical cyclone (Australian scale) |
| Tropical storm (SSHWS) |
|
|
| Duration |
April 19 – April 26 |
| Peak intensity |
100 km/h (65 mph) (10-min) 975 hPa (mbar) |
Cyclone Zuman existed from April 19 to April 26.
Tropical Cyclone Blanch(e)
| Category 1 tropical cyclone (Australian scale) |
|
|
| Duration |
May 20 – May 22 |
| Peak intensity |
75 km/h (45 mph) (10-min) 990 hPa (mbar) |
On May 20, TCWC Nadi started to monitor a tropical depression that had developed about 1,440 km (895 mi) to the northeast of Port Villa, Vanuatu.[5]
Other systems
In addition 12 cyclone, two other systems developed during the season. Cyclone 13P existed from February 2 to February 5. Another system, 19P, existed from February 28 to March 2.
Seasonal effects
Notes
See also
- Atlantic hurricane seasons: 1987, 1988
- Eastern Pacific hurricane seasons: 1987, 1988
- Western Pacific typhoon seasons: 1987, 1988
- North Indian Ocean cyclone seasons: 1987, 1988
References
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- ↑ http://cidbimena.desastres.hn/docum/crid/Agosto2004/pdf/eng/doc5578/doc5578-contenido.pdf
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- ↑ 6.0 6.1 6.2 6.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 9.0 9.1 9.2 9.3 9.4 9.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 10.0 10.1 10.2 10.3 10.4 10.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 11.0 11.1 11.2 11.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 12.0 12.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found. – via Lexis Nexis (subscription required)
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
