PDC Weather Wall

May 2013
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Tropical Cyclone Activity Report – Pacific / Indian Oceans

Tropical cyclone 24S has formed in the South Indian Ocean…located approximately 685 NM east of Diego Garcia (Strengthening tropical cyclone…sustained winds of 35 knots, with gusts to near 45 knots)

PDC Global Hazards Atlas displaying 3 hour precipitation accumulation, strengthening tropical cyclone 24S, with JTWC positions, segments…over the South Indian Ocean

PDC Global Hazards Atlas displaying 3 hour precipitation accumulation, strengthening tropical cyclone 24S, with JTWC positions, segments, and winds…over the South Indian Ocean

A newly formed tropical cyclone, TC 24S has developed in the South Indian Ocean, located approximately 685 NM east of the small island of Diego Garcia. This system has tracked east-northeast at a slow 04 knots during the past six hours. Satellite imagery reveals a consolidating low level circulation center. Surface winds were currently 35 knots, with gusts to near 45 knots.

TC 24S has been nearly stationary over the past 24 hours, as it has continued to gather force, although is forecast to drift slowly south to southwest over the next 24 hours…as it continues to improve its organization and intensity. The Joint Typhoon Warning Center (JTWC) forecast shows TC 24S remaining to the east of Diego Garcia for the time being.

PDC Global Hazards Atlas displaying 3 hour precipitation accumulation, with a tropical disturbance (circled in orange) in the South Indian Ocean…that has a medium chance of developing within 24 hours - and TC 24S to this areas south

PDC Global Hazards Atlas displaying 3 hour precipitation accumulation, with a tropical disturbance (circled in orange) in the North Indian Ocean…that has a medium chance of developing into a tropical cyclone within 24 hours – and TC 24S to this areas south-southwest

There’s an area of disturbed weather that’s active in the north Indian Ocean, circled in orange above, to the north-northeast of newly formed tropical cyclone 24S. When tropical cyclones form closely together, and in different hemisphere’s like this…they are typically called twins. This hasn’t happened yet, although the JTWC is giving this tropical disturbance a medium chance of developing into a tropical cyclone within 24 hours.

This area of disturbed weather is located approximately 600 NM east of Colombo, Sri Lanka. Satellite imagery shows formative cloud bands, which are wrapping into the low level circulation center. These convective bands have deepened significantly during the past 24 hours. Meanwhile, low 05-10 knot (6-12 mph) vertical winds exist above this system…along with excellent poleward outflow. Surface winds are estimated to be 20-25 knots (23-28 mph).