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MISSION UPDATE 6/16/2015:

The Tropical Rainfall Measuring Mission (TRMM), a joint mission of NASA and the Japan Aerospace Exploration Agency, was launched in 1997 to study rainfall for weather and climate research. After over 17 years of productive data gathering, the instruments on TRMM were turned off on April 8. The spacecraft re-entered the Earth’s atmosphere on June 15, 2015, at 11:55 p.m. EDT, over the South Indian Ocean, according to the U.S. Strategic Command’s Joint Functional Component Command for Space through the Joint Space Operations Center (JSpOC), and most of the spacecraft was expected to burn up in the atmosphere during its uncontrolled re-entry.  

The multi-satellite 3B42* / TMPA / TMPA-RT products ended on December 31, 2019. The GPM IMERG dataset now includes TRMM-era data going back to June 2000, and is now the recommended multi-satellite dataset to use for most purposes. Learn more about  the transition from 3B42*/TMPA to IMERG.

TRMM was a research satellite designed to improve our understanding of the distribution and variability of precipitation within the tropics as part of the water cycle in the current climate system. By covering the tropical and sub-tropical regions of the Earth, TRMM provided much needed information on rainfall and its associated heat release that helps to power the global atmospheric circulation that shapes both weather and climate. In coordination with other satellites in NASA's Earth Observing System, TRMM provided important precipitation information using several space-borne instruments to increase our understanding of the interactions between water vapor, clouds, and precipitation, that are central to regulating Earth's climate.

Extreme Weather News

GPM Observes "The Dragon" Cyclonic Storm System in the Middle East
GPM observed the early stages of a strong cyclonic system that developed over northern Africa just off the southern Mediterranean coast on March 11,...
GPM Views Southeast Snowstorm
On February 20th and 21st, 2020, a winter storm brought the seasons largest snowfall to much of North Carolina and southern Virginia. The...
GPM Flies Over Storm Dennis in the UK
Storm Dennis is an extratropical cyclone that developed over the continental United States before undergoing explosive intensification as it...
UPDATE 2/12/2020: An extended IMERG analysis of rainfall in Brazil shows even more extreme rainfall occurring in the first weeks of February, with...
eastern Mediterranean flooding in early 2020
In the two weeks that followed December 25, 2019, several heavy storm systems impacted countries along the eastern Mediterranean. While January is...
By Friday morning, September 20, the rainfall from the remnant of Tropical Storm Imelda had increased to over 24 inches in some areas near the...
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