System 98S (Southern Indian Ocean)

System 98S Southern Indian Ocean
System 98S has been battered with wind shear over the last couple of days and is still holding together as a tropical depression. Infrared satellite imagery from NASA's Aqua satellite revealed an area of strong convection and thunderstorms around the low pressure area's center yesterday, indicating that the low is maintaining strength even in adverse conditions.

On March 16, System 98S was located about 615 nautical miles southeast of Diego Garcia, near 14.2 South latitude and 80.3 East longitude in the Southern Indian Ocean. The Atmospheric Infrared Sounder (AIRS) instrument on NASA's Aqua satellite has been capturing imagery of the low pressure area and today showed that the low level circulation center east of the main area of convection is partially exposed to outside winds.

AIRS infrared imagery also showed that convection had begun flaring or increasing on the western side of the circulation center during the morning hours, indicating strengthening. Flaring convection means the creation of more towering thunderstorms. Thunderstorms power a tropical cyclone. There was also an indication in microwave satellite imagery that thunderstorms were wrapping around the low level center.

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