https://phys.org/news/2018-08-nasa-eyes-tropical-storm-kristy.html

On Aug. 10 at 4:45 a.m. EDT (0845 UTC) the Moderate Resolution Imaging Spectroradiometer, or MODIS, instrument aboard NASA's Aqua satellite analyzed Tropical Storm Kristy's cloud top temperatures in infrared light. MODIS found cloud top temperatures of strongest thunderstorms around Kristy's low-level center were as cold as or colder than minus 70 degrees Fahrenheit (minus 56.6 degrees Celsius). Cloud top temperatures that cold indicate strong storms that have the capability to create heavy rain.

The National Hurricane Center (NHC) noted at 5 a.m. EDT (0900 UTC), the center of Tropical Storm Kristy was located near 18.2 degrees north latitude and 129.8 degrees west longitude. Kristy is far from land areas and about 1,325 miles (2,135 km) west of the southern tip of Baja California, Mexico.