Krosa formed on August 5 as the eleventh tropical depression of the Northwestern Pacific Ocean typhoon season. On August 6 by 5 a.m. EDT (0900 UTC) it had become a tropical storm and was re-named Krosa.

The Global Precipitation Measurement mission or GPM core satellite passed over Tropical Storm Krosa at 10:21 a.m. EDT (1421 UTC) on August 6, 2019. GPM found the heaviest rainfall was east of the center of circulation falling at a rate of 50 mm (about 2 inches) per hour, over open ocean GPM is a joint mission between NASA and the Japan Aerospace Exploration Agency, JAXA.

At 11 a.m. EDT (1500 UTC) Tropical storm Krosa was located near19.0 degrees north latitude and 142.3 east longitude, about 352 miles south of Iwo To Island, Japan. Krosa was moving to the northwest and had maximum sustained winds near 40 knots (46 mph/74 kph).

Read more at: NASA/Goddard Space Flight Center

The GPM core satellite passed over Tropical Storm Krosa at 10:21 a.m. EDT (1421 UTC) on August 6, 2019. GPM found the heaviest rainfall (pink) was east of the center of circulation falling at a rate of 50 mm (about 2 inches) per hour. (Photo Credit: NASA/JAXA/NRL)