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→‎Season effects: La Reunion advisory #1 issued at 1600PM RET stated 1000 hPa for the pressure.
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{{Pacific areas affected (Top)}}
{{Pacific areas affected (Top)}}
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| {{Sort|01|Ashley}} || {{Sort|220925|September 25 - Present}} || bgcolor=#{{storm colour|MTS}}|{{Sort|3|Moderate tropical storm}} || bgcolor=#{{storm colour|MTS}}|{{convert|40|kn|km/h mph|order=out|abbr=on|round=5|sortable=on}} || bgcolor=#{{storm colour|MTS}}|{{convert|1001|hPa|inHg|sigfig=4|abbr=on|sortable=on}} || None ||{{sort|0|None}} || {{sort|0|None}} ||
| {{Sort|01|Ashley}} || {{Sort|220925|September 25 - Present}} || bgcolor=#{{storm colour|MTS}}|{{Sort|3|Moderate tropical storm}} || bgcolor=#{{storm colour|MTS}}|{{convert|40|kn|km/h mph|order=out|abbr=on|round=5|sortable=on}} || bgcolor=#{{storm colour|MTS}}|{{convert|1000|hPa|inHg|sigfig=4|abbr=on|sortable=on}} || None ||{{sort|0|None}} || {{sort|0|None}} ||
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{{TC Areas affected (Bottom)|TC's=1 system|dates=25 September - Season ongoing|winds={{convert|40|kn|km/h mph|order=out|abbr=on|round=5}}|pres={{convert|1001|hPa|inHg|sigfig=4|abbr=on}}|damage=|deaths=0|Refs=}}
{{TC Areas affected (Bottom)|TC's=1 system|dates=25 September - Season ongoing|winds={{convert|40|kn|km/h mph|order=out|abbr=on|round=5}}|pres={{convert|1000|hPa|inHg|sigfig=4|abbr=on}}|damage=|deaths=0|Refs=}}


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

Revision as of 07:08, 27 September 2022

2022–23 South-West Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formed25 September 2022
Last system dissipatedSeason ongoing
Strongest storm
NameAshley
 • Maximum winds75 km/h (45 mph)
(10-minute sustained)
 • Lowest pressure1001 hPa (mbar)
Seasonal statistics
Total disturbances1
Total depressions1
Total storms1
Total fatalitiesNone
Total damageNone
Related articles
South-West Indian Ocean tropical cyclone seasons
2020–21, 2021–22, 2022–23, 2023–24, 2024–25

The 2022–23 South-West Indian Ocean cyclone season is an ongoing event of the annual cycle of tropical cyclone and subtropical cyclone formation. It will begin on 15 November 2022, and will end on 30 April 2023, with the exception for Mauritius and the Seychelles, for which it will end on 15 May 2023. 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. However, tropical cyclones can form year-round, and all tropical cyclones that will form between 1 July 2022 and 30 June 2023 will be part of the season. Tropical and subtropical cyclones in this basin are monitored by the Regional Specialised Meteorological Centre in Réunion and unofficially by the Joint Typhoon Warning Center.

Seasonal summary

Tropical cyclone scales#Comparisons across basins

Systems

Moderate Tropical Storm Ashley

Moderate tropical storm (MFR)
Tropical storm (SSHWS)
 
Duration25 September – Present
Peak intensity75 km/h (45 mph) (10-min);
1001 hPa (mbar)

By 22 September, a near-equatorial trough produced a weak tropical low in the Indian Ocean, initially expected by Météo-France to not form due to upper wind shear.[1] However, environmental conditions improved over the next 3 days,[2] and the low organized enough to become the 1st tropical depression of the season by 26 September.[3]

Storm names

Within the South-West Indian Ocean, tropical depressions and subtropical depressions that are judged to have 10-minute sustained windspeeds of 65 km/h (40 mph) by the Regional Specialized Meteorological Center on 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 (Mauritius Meteorological Services) 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 (Madagascar Meteorological Services) in Madagascar assigns the appropriate name to the storm. Storm names are taken from three pre-determined lists of names, which rotate on a triennial basis, with any names that have been used automatically removed. Therefore, all storm names used this year will be removed from the rotation and replaced with a new name for the 2025–26 season, while the unused names will remain on the list.[4] New names this season are: Ashley, Balita, Cheneso, Dingani, Enali, Fabien, Gezani, Horacio, Indusa and Juluka. They replaced Ambali, Belna, Calvinia, Diane, Esami, Francisco, Gabekile, Herold, Irondro and Jeruto during the 2019–20 season.[4]

  • Ashley (active)
  • Balita (unused)
  • Cheneso (unused)
  • Dingani (unused)
  • Enali (unused)
  • Fabien (unused)
  • Gezani (unused)
  • Horacio (unused)
  • Indusa (unused)
  • Juluka (unused)
  • Kundai (unused)
  • Lisebo (unused)
  • Michel (unused)
  • Nousra (unused)
  • Olivier (unused)
  • Pokera (unused)
  • Quincy (unused)
  • Rebaone (unused)
  • Salama (unused)
  • Tristan (unused)
  • Ursula (unused)
  • Violet (unused)
  • Wilson (unused)
  • Xila (unused)
  • Yekela (unused)
  • Zania (unused)

Season effects

This table lists all of the tropical cyclones and subtropical cyclones that were monitored during the 2022–2023 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 2022 or 2023 USD.

Name Dates Peak intensity Areas affected Damage
(USD) 		Deaths Refs
Category Wind speed Pressure
Ashley September 25 - Present Moderate tropical storm 75 km/h (45 mph) 1,000 hPa (29.53 inHg) None None None
Season aggregates
1 system 25 September - Season ongoing 75 km/h (45 mph) 1,000 hPa (29.53 inHg) 0

See also

References

  1. ^ "Bulletin for Cyclonic Activity and Significant Tropical Weather in the Southwest Indian Ocean" (PDF). Météo-France. 22 September 2022. Retrieved 26 September 2022.
  2. ^ "Bulletin for Cyclonic Activity and Significant Tropical Weather in the Southwest Indian Ocean" (PDF). Météo-France. 25 September 2022. Retrieved 26 September 2022.
  3. ^ "Tropical Cyclone Forecast Warning (South-West Indian Ocean)" (PDF). Météo-France. 26 September 2022. Retrieved 26 September 2022.
  4. ^ a b Regional Association I Tropical Cyclone Committee (2021). "Tropical Cyclone Operational Plan for the South-West Indian Ocean" (PDF). World Meteorological Organization. Archived (PDF) from the original on 14 February 2022. Retrieved 14 February 2022.
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