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Posts tagged Intense Tropical Cyclone

Intense Tropical Cyclone Anais (01S) in Southwest Indian Ocean

13S 59.9E

October 15th, 2012 Category: Tropical Cyclones

Tropical Cyclone Anais (01S) – October 13th, 2012

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Track of Tropical Cyclone Anais (01S) - October 14th, 2012 © Univ. of Wisconsin

Track of TS 01S

On October 12, 2012, the JTWC issued a Tropical Cyclone Formation Alert (TCFA) on a system near the Chagos Islands.

Soon afterwards, RSMC La Réunion designated the system as a tropical disturbance while located roughly 70 nautical miles (130 km) to the west of Diego Garcia. That afternoon, the JTWC upgraded the system into a tropical depression, giving it the designation 01S.

The next day, RSMC La Réunion reported that the system had intensified into a moderate tropical storm and named it Anais. As the day progressed, Anais began a period of quick intensification- being upgraded into a tropical cyclone by RSMC La Réunion and a category one tropical cyclone by the JTWC.

Anais continued to gradually intensify and was upgraded into an intense tropical cyclone by RSMC La Réunion early on October 14. This marked the earliest formation of an intense tropical cyclone in the South-West Indian Ocean.

Tropical Cyclone Cleo (03S) Gradually Weakens

8.6S 63.9E

December 11th, 2009 Category: Tropical Storms

Tropical Cyclone Cleo (03S) - December 9th, 2009

Tropical Cyclone Cleo (03S) - December 9th, 2009

Track of TC 03S - December 11th, 2009 © Univ. of Wisconsin

Track of TC 03S

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On December 6th, a tropical disturbance formed in the central Indian Ocean. The storm was expected to strengthen slowly, however, the next day, the disturbance strengthened into a severe tropical storm and was designated Tropical Cyclone 03S. On December 8th, it strengthened rapidly to become the first Intense Tropical Cyclone of the southwest Indian Ocean cyclone season.

TC 03S sustained this strength for a day, as can be observed in this image from December 9th. The following day, it slowly weakened to a category 2 cyclone and continued to weaken throughout the day to a tropical storm.

Currently, Tropical Cyclone Cleo (03S), located approximately 480 nm southwest of Diego Garcia, has tracked west-northwestward at 9 knots over the past six hours. The low level circulation center remains fully exposed, and the remaining deep convection is nearly depleted.

Convection is not expected to rebuild over the center due to the continued effects of vertical wind shear and dry air. Intensity fixes concur that the system is 35 knots or less. Maximum significant wave height is 14 feet.