https://phys.org/news/2018-10-nasa-powerful-storms-circling-major.html

Strongest thunderstorms wit coldest cloud tops appeared in the eyewall of the hurricane and extended outward from the center. MODIS found cloud top temperatures as cold as minus 80 degrees Fahrenheit (minus 62.2 Celsius). NASA research has shown that cloud tops with temperatures that cold were high in the troposphere and have the ability to generate heavy rain.

The National Hurricane Center or NHC noted at 5 a.m. EDT (0900 UTC), the center of Hurricane Sergio was located near latitude 12.3 degrees north and longitude 116.7 degrees west. Sergio is moving toward the west-northwest near 12 mph (19 kph). Fortunately, Sergio is far from land areas. It is about 855 miles (1,380 km) south-southwest of the southern tip of Baja California, Mexico.