Tropical Cyclone Cherono

Tropical Cyclone Cherono and saw some heavy rain still existing in the storm as it dissipates.

The TRMM satellite passed directly above the remnants of tropical cyclone Cherono in the South Indian Ocean on March 22, 2011 at 0225 UTC (March 21 at 10:25 p.m. EDT). TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) showed that Cherono, although weakened, still had some life and was producing very heavy rainfall of over 50 mm/hr (~2 inches) south-southeast of Reunion Island.

The image of Cherono's rainfall was created by Hal Pierce of the TRMM team at NASA's Goddard Space Flight Center in Greenbelt, Md. Rain rates in the center of the image swath are from the TRMM PR, the only spaceborne radar of its kind, while those in the outer portion are from the TMI. The rain rates are overlaid on infrared (IR) data from the TRMM Visible Infrared Scanner (VIRS).

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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.