https://phys.org/news/2018-08-nasa-tropical-storm-bebinca-vietnam.html

Infrared light provides valuable temperature data to forecasters and cloud top temperatures give clues about highest, coldest, strongest storms within a tropical cyclone.

On Aug. 16 10:45 a.m. EDT (1445 UTC) the Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard NASA's Terra satellite captured an infrared image of Tropical Storm Bebinca. MODIS found cloud top temperatures of strong thunderstorms around the center and just off-shore. Those cloud tops were as cold as or colder than minus 80 degrees Fahrenheit (minus 62.2 Celsius).NASA research has shown that cloud tops that cold can produce heavy rainfall.