Rajan MungraDirector and PR with WMO

Mauritius Meteorological Services

25 September 2017

� Introduction

� Cyclone Activity: 2015-2016 & 2016-2017

� VITC FANTALA

� STS CARLOS

� Conclusion

CLASS Iissued 36 - 48 hours before the occurrence of gusts of 120 km/hr.

CLASS IIissued, as far as practicable, 12 hours of daylight before the occurrence of gusts of 120 km/hr.

CLASS IIIissued , as far as practicable, 6 hours of daylight before the advent of 120 km/hr gusts.

CLASS IVissued when gusts of 120 km/hr have been recorded and are expected to continue.

TERMINATIONThere is no longer any risk of gusts exceeding 120 km/hr.

4 CYCLONE WARNING CLASSES

•Cyclone Season: 01 November to 15 May•Summer Outlook issued at the end of October

� About 2000mm of rainfall annually

� Two third of rainfall in Summer and

� One third rainfall in Winter

� 2015-2016 more active than 2016-2017 during the cyclonic season◦ 2015-2016:7 named storms (within cyclonic period)

◦ 2016-2017:4 named storms (within cyclonic period)

and 2 outside (one in July and one in October)

� 2016-2017 was a late season with first named system in February 2017 .

Season MTS STS TC ITC VITC

2015-2016 2 2 0 2 1

2016-2017 3 1 1 0 1

� One of the strongest storm in the SWIO onrecord.

� Named by the Mauritius Meteorological Serviceson 11 April 2016@1800UTC in consultationwith RSMC-La Reunion.

� Was a potential threat to Agalega� Twelve special communiqué were issued to

inform the public of the impending dangers� 72 Residents from the South Island of Agalega

evacuated to the Emergency Centre in the NorthIsland.

� Agalega affected mainly by high seas emanatingfrom FANTALA

� Named by the Mauritius MeteorologicalServices on 04 February@1200 UTC inconsultation with RSMC-La Reunion.

� CARLOS affected Mauritius and cyclonewarnings were issued as follows:◦ CLASS I Warning issued on 04@1215 UTC (24 hours)

◦ CLASS II Warning issued on 05@1215 UTC (42 hours)

◦ No warning on 07@0615 UTC

� Closest distance: about 110 km off the northnorthwest coast of Mauritius

� Lowest MSL pressure recorded:1005.1hPa on06@2200 UTC

Station

Date Rainfall (04-06) Feb 20174-5 5- 6 6 -7

N. Decouverte 28.2 21.4 207.2 256.8

Arnaud 22.2 39.0 242.4 303.6

Mon Bois 53.8 23.6 252.0 329.4

Union Park 65.2 13.0 208.5 286.7

Bel Etang 74.0 21.5 233.2 328.7

Providence 33.2 30.0 206.8 270.0

Grande Providence 111 44.5 385 540.5

�Widespread rainfall over Mauritius particularly on 06 February withhighest 24 hour rainfall amounted to 385 mm�CARLOS contributed 69 % of the long term mean rainfall for the monthof February

STATION Highest gust recorded

05-07 February 2017 (km/h)Le Morne 112 (06 @21h30)

D. Les Pailles 101(07@02h30)

Champs de Mars 101(06@10h00)

St. Felix 86 (06 @23h00)

Vacoas 81 (07@02h45)

Highest recorded gust was of 112km/h

Old Radar at Trou-aux-Cerfs

� Two seasons; one marked by the strongeststorm in the SWIO Bassin (2015-16) and theother by a named system in July (2016-17).

� No major damages by STS CARLOS inMauritius except for some localised flooding.

� CARLOS brought and end to a long relativelydry spell

Thank You

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Merci Beaucoup

Mauritius Meteorological ServicesWebsite: http://metservice.intnet.muEmail: meteo@intnet.muFax: +230 6861033Te:+230 6861031/32