The Global Precipitation Measurement or GPM core satellite provided data on the heavy rainfall and strong storms that affected the southern U.S. on March 9. An analysis of rainfall between March 2 and 9 showed that over a foot of rain had fallen in areas of Texas to Arkansas.
GPM is a mission that is co-managed by NASA and the Japan Aerospace Exploration Agency that measures precipitation rates around the world every three hours. GPM flew over and analyzed the strong storms that occurred in the southwestern United States on March 9, 2016 at 1011 UTC (5:11 CST).