https://phys.org/news/2018-08-nasa-formation-eastern-pacific-tropical.html > Coldest cloud tops were near minus 70 degrees Fahrenheit (minus 56.6 degrees Celsius). Aqua observed fragmented bands of thunderstorms circling a low-level center of circulation and some stronger storms within them. > Storms with cloud top temperatures that cold have the capability to produce heavy rainfall. That heavy rain was falling over open ocean waters.