https://phys.org/news/2018-08-nasa-hurricane-miriam-tracking-central.html

AIRS saw coldest cloud top temperatures around the center and in a large band of thunderstorms extending east and south of the center. In both of those areas, cloud top temperatures were as cold as minus 63 degrees Fahrenheit (minus 53 degrees Celsius). Since the AIRS overpass, however, cloud tops have been warming in the southeast. There is also some drier air working its way into the circulation.

On Aug. 30 at 11 a.m. EDT (5 a.m. HST/1500 UTC) NOAA's Central Pacific Hurricane Center or CPHC noted the center of Hurricane Miriam was located near latitude 15.3 degrees north and longitude 141.6 degrees west. That's about 940 miles (1,510 km) east-southeast of Hilo, Hawaii.