TRMM

Tropical cyclone Giovanna was located in the Indian Ocean east-northeast of Madagascar when it was classified as a tropical storm on 9 Febuary 2012. The TRMM satellite image above shows Giovanna when it was rapidly becoming more powerful on 11 February 2012 at 1200 UTC. Giovanna had intensified to a category 3 tropical cyclone on the Saffir-Simpson scale with wind speeds estimated at 100 kts (~115 mph). This TRMM pass shows that an eyewall replacement was occurring at that time. A small ring of strong convective storms was located around the center of the center eye and other powerful storms

The TRMM satellite traveled directly above tropical cyclone Jasmine in the south Pacific Ocean on 8 February 2012 at 2156 UTC. Jasmine was classified as a powerful category 4 on the Saffir Simpson Scale with wind speeds of 115 kts (~132 mph) at it's peak intensity but had started to weaken at the time of this pass. Rainfall from TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) instruments showed that intense storms in bands around Jasmine's large circular eye were dropping rainfall at a rate of over 50mm/hr (~2 inches). This was a daytime pass so the rainfall analysis was overlaid on

The TRMM satellite passed above a developing tropical cyclone in the South Indian Ocean designated as 12S on 9 February 2012 at 0402UTC. A rainfall analysis derived from TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) is shown overlaid on a visible/infrared image from TRMM's Visible and InfraRed Scanner (VIRS) instrument. This TRMM view shows that the storm was already well organized. TRMM's PR shows that heavy rainfall of over 50 mm/hr (~2 inches) was occuring in storms near center of the circulation. Some of the powerful storms dropping this rainfall were shown by TRMM to reach

Low pressure centers associated with a summer monsoon trough have repeatedly drenched Australia from central Queensland to northern New South Wales. The clockwise rotation of these low pressure centers have continued to pump warm moist air from the Coral Sea over these areas resulting in severe flooding. Thousands of Australians have been displaced by this flooding. The current La Nina conditions are predicted to continue causing heavy rainfall over northeastern Australia. Data from the TRMM satellite are used to calibrate rainfall data merged from various satellite sources. This TRMM-based

On 2 February 2012 at 1044 UTC the TRMM satellite again saw weakening tropical storm IGGY as it was approaching the coast of southwestern Australia. Data from TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) instruments showed that bands of heavy rainfall measuring over 50mm/hr (~2 inches) were hitting coastal areas northwest of Perth, Australia. A red tropical storm symbol shows where Iggy's center was located.

The TRMM satellite passed above tropical storm Iggy on 1 February 2012 at 0647 UTC as the storm was heading toward the coast of southwestern Australia. Iggy was briefly categorized as a category 1 tropical cyclone on the Saffir-Simpson scale but is predicted to be a weak tropical storm with winds of about 35kts (~40 mph) when it moves over the Australian coast. Iggy's past and forecast locations are shown with appropriate white tropical cyclone symbols on the image above. TRMM data revealed that Iggy had a large area of moderate to heavy rainfall south of the center of circulation. TRMM's

The TRMM satellite saw directly into the eye of tropical Cyclone Funso on 26 January 2012 at 2013 UTC. TRMM Microwave Imager (TMI) and Precipitation Radar (PR) rainfall shows that frequent moderate to heavy rainfall was located in bands around Funso. TRMM PR data show that the tallest storm towers , reaching to about 12km (~7.5 miles), were located in a feeder band southwest of the eye.

Thousands of people were asked to evacuate recently as parts of northern and eastern Australia felt the effects of heavy rains brought about by the summer monsoon. Though not expected to be as bad as last year, when dozens of people were killed and tens of thousands of homes were flooded, the recent heavy rains have led to flash flooding and landslides in Queensland and caused rivers to overflow their banks in New South Wales. The monsoon plays a prominent role in the annual rainfall cycle over Australia. A monsoon is a seasonal phenomenon wherein an area of low pressure forms over a large

The TRMM satellite had a good view of powerful tropical cyclone Funso battering the Mozambique coast when it flew over on 23 January 2012 at 1451 UTC. TRMM data shows that Funso was dropping moderate to heavy rainfall in bands covering the Mozambique channel from eastern Mozambique to western Madagascar. Storms and floods from Funso have killed at least 22 people and forced tens of thousands from their homes in Mozambique. Tropical cyclone Funso formed in the Mozambique channel off the coast of Mozambique on 19 January 2012. The image above shows what TRMM saw on 21 January 2012 when Funso had

On 10 January 2012 at 1544 UTC the TRMM satellite passed above tropical storm Heidi as it was forming off the northwestern coast of Australia. Heidi is the first named tropical cyclone to hit Australia this season. An analysis of rainfall from TRMM Microwave Imager (TMI) and Precipitation Radar (PR) data is shown above. This analysis shows that Heidi was starting to get organized with bands of heavy convective rainfall spiraling toward the center of the storm. Heidi was dropping rainfall at a rate of over 50mm/hr (~2 inches) in some areas. A 3-D image above was made from TRMM PR data. It shows