After maintaining hurricane intensity for over a week former category four hurricane Olaf is now a weakening tropical storm. The GPM core observatory satellite flew above Olaf on October 26, 2015 at 0510Z. Rainfall derived from data collected by GPM's Microwave Imager (GMI) and Dual-Frequency Precipitation Radar (DPR) instruments is shown here. Olaf had moved over cooler waters that were sapping the tropical cyclone's energy. GPM's GMI found that storms located in a small area within Olaf were still dropping rain at a rate of over 65 mm (2.6 inches) per hour. GPM's radar (DPR Ku band) sliced

During the night tropical storm Patricia became much better organized and was upgraded to a hurricane. The GPM core observatory satellite flew above the intensifying tropical cyclone on October 22, 2015 at 0401 UTC. Patricia was still a tropical storm with maximum sustained winds estimated at 55 kts (63 mph) at that time but rainfall derived from GPM's Microwave Imager (GMI) and Dual-Frequency Precipitation Radar (DPR) instruments showed that an eye was forming. The National Hurricane Center (NHC) 0400 AM CTD discussion said that, "... 37 GHz GPM image showed a cyan ring around the eye, which

Tropical Depression Twenty-E (TD20E) formed on October 20, 2015 off the Mexican coast southeast of Puerto Escondido, Mexico. Later that evening TD20E was upgraded to tropical storm Patricia. On October 21, 2015 at 1634 UTC (11:34 AM CDT) the GPM core observatory satellite flew over tropical storm Patricia. GPM's Microwave Imager (GMI) instrument had good coverage of the rainfall associated with the tropical storm. Rainfall data derived from GMI are shown overlaid on a GOES-EAST Visible/Infrared image captured at 1645 UTC (11:45 AM CDT). GPM's Dual-Frequency Precipitation Radar (DPR) instrument

On October 19, 2015 Hurricane Olaf became the eighth category four hurricane in the busy 2015 Eastern Pacific hurricane season. The GPM core observatory satellite had a good look at the distribution of rainfall around powerful hurricane Olaf on October 20, 2015 at 0716 UTC. At that time Olaf had sustained winds estimated at over 130 kts (150 mph). GPM's Microwave Imager (GMI) and Dual-Frequency Precipitation Radar (DPR) measured the intensity of rainfall within the hurricane. GPM's GMI found rain falling at a rate of over 71.5 mm (2.8 inches) per hour in Olaf's eye wall. The DPR instrument

Extremely heavy rainfall from super typhoon Koppu has caused deadly flooding and mudslides in the Philippines. Koppu hit the eastern coast of Luzon as a category four super typhoon with winds of 130kts (150 mph). Koppu weakened but was still battering the Philippines as a typhoon after reaching the Lingayen Gulf on Luzon's western coast. Typhoon Koppu then made a turn toward the north and continued to drench the northern Philippines as it followed Luzon's northwestern coast. Torrents of rain flowing from mountainous terrain magnified the effects of very high rainfall totals. A rainfall