https://phys.org/news/2018-08-infrared-nasa-imagery-tropical-storm.html

AIRS saw coldest cloud top temperatures around the center of circulation and in a thick feeder band north to northeast of the storm's center. Those cloud top temperatures were as cold as minus 63 degrees Fahrenheit (minus 53 degrees Celsius). Storms with cloud top temperatures that cold have the capability to produce heavy rainfall.

The Joint Typhoon Warning Center or JTWC noted on Aug. 16 at 11 a.m. EDT (1500 UTC) that Soulik was centered near 18.5 degrees north latitude and 141.8 degrees east longitude. That's about 379 nautical miles south of Iwo To Island, Japan. Soulik was moving to the north-northwest and had maximum sustained winds near 63.2 mph (55 knots /102 kph).