https://phys.org/news/2018-08-nasa-noaa-suomi-npp-satellite-weaker.html

On August 13 at 0324 UTC (Aug. 12 at 11:24 p.m. EDT) the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard NASA-NOAA's Suomi NPP satellite captured visible image of Leepi. The image showed powerful thunderstorms circling the low-level center of circulation and extending in a band northeast of the center. The storm appeared to be degrading from the previous day's satellite imagery.

On August 13 at 11 a.m. EDT (1500 UTC), the Joint Typhoon Warning Center or JTWC noted that Tropical Storm Leepi was located near 27.8 degrees north latitude and 136.9 degrees east longitude, about 541 nautical miles southeast of Sasebo, Japan. Leepi had maximum sustained winds near 63.2 mph (55 knots/103.2 kph) but is on weakening trend.