https://phys.org/news/2018-08-nasa-satellite-16w-subtropical.html

The JTWC reported that the cyclone had fully transformed into a subtropical system characterized by "an expansive wind field with the strongest winds away from the center, upper level low directly overhead, absence of a warm anomaly at the core, and cold, dry air intrusion from the northwest."

On Aug. 1 at 0348 UTC (July 31 at 11:48 p.m. EDT) the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard NASA-NOAA's Suomi NPP satellite captured visible image of 16W over the open waters of the Northwestern Pacific Ocean. 16W appeared asymmetrical on the VIIRS imagery with the bulk of clouds pushed south of center.