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2017–18 South-West Indian Ocean cyclone season: Difference between revisions

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{{Pacific areas affected (Top)}} {{Pacific areas affected (Top)}}
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| {{Sort|01|Ava}} || {{Sort|171229|December 29 – Present}} || bgcolor=#{{storm colour|STS}}|{{Sort|4|Severe tropical storm}} || bgcolor=#{{storm colour|STS}}|{{Sort|110|110 km/h (70 mph)}} || bgcolor=#{{storm colour|STS}}|{{Sort|0978|978 hPa (28.88 inHg)}} || Madagascar || None || None || | {{Sort|01|Ava}} || {{Sort|171229|December 29 – Present}} || bgcolor=#{{storm colour|swiotc}}|{{Sort|5|Tropical Cyclone}} || bgcolor=#{{storm colour|swiotc}}|{{Sort|120|120 km/h (75 mph)}} || bgcolor=#{{storm colour|swiotc}}|{{Sort|0973|973 hPa (28.73 inHg)}} || Madagascar || None || None ||
|- |-
{{TC Areas affected (Bottom)|TC's=1 system|dates=December 29 – Present|winds=110 km/h (70 mph)|pres=978 hPa (28.88 inHg)|damage=None|deaths=None|Refs=}} {{TC Areas affected (Bottom)|TC's=1 system|dates=December 29 – Present|winds=120 km/h (75 mph)|pres=978 hPa (28.73 inHg)|damage=None|deaths=None|Refs=}}


==See also== ==See also==

Revision as of 00:29, 5 January 2018

2017–18 South-West Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formedDecember 29, 2017
Last system dissipatedSeason Ongoing
Strongest storm
NameAva
 • Maximum winds110 km/h (70 mph)
(10-minute sustained)
 • Lowest pressure978 hPa (mbar)
Seasonal statistics
Total disturbances1 official, 1 unofficial
Total depressions1
Total storms1
Tropical cyclones0
Intense tropical cyclones0
Total fatalities0
Total damageNone
Related articles
South-West Indian Ocean tropical cyclone seasons
2015–16, 2016–17, 2017–18, 2018–19, 2019–20

The 2017–18 South-West Indian Ocean cyclone season is a current event in the annual cycle of tropical cyclone and subtropical cyclone formation. It officially began on November 15, 2017, and will end officially on April 30, 2018, with the exception for Mauritius and the Seychelles, for which it will end on May 15, 2018. These dates conventionally delimit the period of each year when most tropical and subtropical cyclones form in the basin, which is west of 90°E and south of the Equator. Tropical and subtropical cyclones in this basin are monitored by the Regional Specialised Meteorological Centre in Réunion.

Seasonal summary

Tropical cyclone scales#Comparisons across basins

Systems

Severe Tropical Storm Ava

Ava
Current storm status
Severe tropical storm (MFR)
Current storm status
Tropical storm (1-min mean)
Satellite image Forecast track map
As of:22:00 RET (18:00 UTC),
January 4
Location:17°06′N 50°54′E / 17.1°N 50.9°E / 17.1; 50.9 (Ava)
630 km (390 mi) NW of La Réunion
Sustained winds:110 km/h (70 mph) (10-min mean)
110 km/h (70 mph) (1-min mean)
gusting to 155 km/h (100 mph)
Pressure:978 hPa (mbar; 28.88 inHg)
Movement:W at 6 kn (11 km/h; 6.9 mph)
See more detailed information.

Current storm information

As of 22:00 RET (18:00 UTC) January 4, Severe Tropical Storm Ava is located near 17°06′S 50°54′E / 17.1°S 50.9°E / -17.1; 50.9 (Ava), about 630 kilometres (390 miles) northwest of La Réunion. 10-minute sustained winds are at 110 km/h (70 mph), while 1-minute sustained winds are at 110 km/h (70 mph), with gusts of up to 155 km/h (100 mph). The minimum barometric pressure is at 978 hectopascals (28.88 inHg), and the system is moving westwards at 6 knots (11 km/h; 6.9 mph).

For latest official information, see:

Other systems

A low-pressure system, classified as a tropical low by the Australian Bureau of Meteorology, moved west-southwest across the 90th meridian east into the Southwest Indian Ocean basin on August 8. At 10:00 UTC the following day, Météo-France Réunion upgraded the low-pressure system to a zone of disturbed weather, with sustained winds of up to 55 km/h (35 mph) being detected on the southern side of the circulation by scatterometer. At this time, the disturbance was located approximately 2,375 km (1,475 mi) west of Jakarta, Indonesia. Météo-France noted that the revival of convective activity in the basin was likely due to the interaction between an eastwards-moving Kelvin wave and a westwards-moving Rossby wave.

Storm names

Within the South-West Indian Ocean, tropical depressions and subtropical depressions that are judged to have 10-minute sustained wind speeds of 65 km/h (40 mph) by the Regional Specialized Meteorological Center on La Réunion Island, France (RSMC La Réunion) are usually assigned a name. However, it is the Sub-Regional Tropical Cyclone Advisory Centers in Mauritius and Madagascar who name the systems. The Sub-Regional Tropical Cyclone Advisory Center in Mauritius names a storm should it intensify into a moderate tropical storm between 55°E and 90°E. If instead a cyclone intensifies into a moderate tropical storm between 30°E and 55°E then the Sub-Regional Tropical Cyclone Advisory Center in Madagascar assigns the appropriate name to the storm. Beginning from the 2016–17 season, name lists within the South-West Indian Ocean will be rotated on a triennial basis. Storm names are only used once, so any storm name used this year will be removed from rotation and replaced with a new name for the 2020–21 season. The unused names are expected to be reused in the list for the 2020–21 season.

  • Ava (active)
  • Berguitta (unused)
  • Cebile (unused)
  • Dumazile (unused)
  • Eliakim (unused)
  • Fakir (unused)
  • Guambe (unused)
  • Habana (unused)
  • Iman (unused)
  • Jobo (unused)
  • Kanga (unused)
  • Ludzi (unused)
  • Melina (unused)
  • Nathan (unused)
  • Onias (unused)
  • Pelagie (unused)
  • Quamar (unused)
  • Rita (unused)
  • Solani (unused)
  • Tarik (unused)
  • Urilia (unused)
  • Vuyane (unused)
  • Wagner (unused)
  • Xusa (unused)
  • Yarona (unused)
  • Zacarias (unused)

Seasonal effects

This table lists all of the tropical cyclones and subtropical cyclones that were monitored during the 2017–2018 South-West Indian Ocean cyclone season. Information on their intensity, duration, name, areas affected, primarily comes from RSMC La Réunion. Death and damage reports come from either press reports or the relevant national disaster management agency while the damage totals are given in 2017 or 2018 USD.

Name Dates Peak intensity Areas affected Damage
(USD) 		Deaths Refs
Category Wind speed Pressure
Ava December 29 – Present Tropical Cyclone 120 km/h (75 mph) 973 hPa (28.73 inHg) Madagascar None None
Season aggregates
1 system December 29 – Present 120 km/h (75 mph) 978 hPa (28.73 inHg) None None

See also

References

  1. "WebCite query result". www.webcitation.org. Retrieved 2017-08-08. {{cite web}}: Cite uses generic title (help)
  2. "WebCite query result". www.webcitation.org. Retrieved 2017-08-09. {{cite web}}: Cite uses generic title (help)
  3. ^ "ZCIT Bulletin for August 9 2017" (PDF). {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
  4. Regional Association I Tropical Cyclone Committee (2016). "Tropical Cyclone Operational Plan for the South-West Indian Ocean" (PDF). World Meteorological Organization. Retrieved 2016-10-05.

External links

Tropical cyclones of the 2017–18 South-West Indian Ocean cyclone season
TCAva TCIrving ITCBerguitta TD04 ITCCebile ITCDumazile STSEliakim TCFakir STSFlamboyan
2010–2019 South-West Indian Ocean cyclone seasons
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