Tropical cyclone Ando in the Indian Ocean

Tropical cyclone Ando in the Indian Ocean

06 January 2001 00:00 UTC

Tropical cyclone Ando in the Indian Ocean
Tropical cyclone Ando in the Indian Ocean

The images below of the cyclone Ando (passing between Madagascar and La Reunion) were taken by Meteosat-5 over the Indian Ocean on 6 January.

Last Updated

21 October 2020

Published on

05 January 2001

 

 

The Tropical Cyclone season 2001 in the Southern Indian Ocean started early on 2 January when Tropical Cyclone Ando was born at about 11 °S and 61 °E. This is approximately 1200 km east of the northern tip of Madagascar. It is in the area of the Southern Intertropical Convergence Zone, which, at the start of the year, was positioned between the Equator and 10°S.

In the beginning, Ando moved to the south-west, towards the central part of Madagascar. The system rapidly intensified as it tracked beneath the subtropical ridge. Luckily, on 5 January, Ando turned to a more southerly direction, moving at 8–10 knots, so that it passed right between Madagascar and the island of Reunion, at a distance of only 240 km from La Reunion.

If Ando had hit one of the islands it would have most probably caused severe damage. Its intensity can be seen from the above Meteosat-5 infrared satellite image. Ando reached its maximum intensity on 6 January with a central pressure of less than 930 hPa (Tropical Cyclone category 5), wind maxima of 225 km/h and gusts up to 270 km/h, as reported in the warning of the Joint Typhoon Warning Centre located on Guam Island. Maximum reported significant wave height was 6 m.

The satellite images depict a well-organised symmetric storm system with a concentric eye of about 40 km and intense, solid core convection. Further features of Ando, as depicted by animated water vapour images and QuikSCAT data, include a symmetric wind field with 35-knot wind radius extending to about 280 km and an impressive high-level outflow over the storm system.

One day later, on 7 January 2001, Ando started weakening caused by a quasi-stationary longwave trough situated over South Africa. It finally disappeared on 11 January 2001 in the area south-east of Southern Madagascar.

Meteosat-5, operating at 63 °E under EUMETSAT's Indian Ocean Data Coverage service, played a key role in the tracking and predicting the path of Ando. The service was recently extended to continue until the end of 2005.

 

Figure 1: Cyclone Ando in infrared (06:00 UTC)

 

Figure 2: Cyclone Ando in visible (09:00 UTC)

 

Figure 3: Cyclone Track