On Monday October 9, 2017 at 1100 AM AST (1500 UTC) tropical depression seventeen (TD17) was upgraded to tropical storm Ophelia. The tropical storm is located over the open waters of the the eastern Atlantic southwest of the Azores. The GPM core observatory satellite had a good view of tropical storm Ophelia on October 10, 2017 at 2:46 PM AST (1846 UTC). GPM's Microwave Imager (GMI) and Dual-Frequency Precipitation Radar (DPR) revealed that the storm was organized but most of the rainfall in the storm was only of light to moderate intensity. The area covered by GPM's 151.9 mile wide (245 km)

The GPM core observatory satellite passed above powerful thunderstorms within land falling hurricane Nate on October 8, 2017 at 4:41 AM EDT (0841 UTC). GPM's Dual-Frequency Precipitation Radar (DPR) found that a few storms over southwestern Alabama were dropping rain at the extreme rate of greater than 4 inches (102 mm) per hour. This 3-D slice by GPM's radar (DPR Ku Band) shows the structure of precipitation within the powerful thunderstorms near the center of hurricane Nate. A few thunderstorms over Alabama were found by GPM's radar to have tops reaching heights above 10.5 miles (17 km).

Starting with the first orbit of 9 October 2017, the MHS data from NOAA-19 began displaying substantial artifacts. After the orbit crossing 00 UTC 10 October, the NOAA-19 data have been embargoed from Early and Late IMERG, although it took until 03 UTC for all artifacts to age off the morphing. At this point, Early and Late IMERG appear nominal, except they lack the sampling that NOAA-19 provides.

The GPM core observatory satellite passed above forming tropical storm Nate (TD16) on October 5, 2017 at 5:46 AM EDT (0946 UTC). TD16 was located in the western Caribbean near the coast of Nicaragua with winds of about 34.5 mph (30 kts). Data received by GPM's Microwave Imager (GMI) and Dual-Frequency Precipitation Radar (DPR) shows bands of rain producing heavy rainfall East of TD16's center of circulation. Downpours in the Caribbean Sea East of Nicaragua were measured by GPM's Radar (DPR Ku Band) dropping rain at a rate of over 6.4 inches (162 mm) per hour. This close-up 3-d cross section