https://phys.org/news/2018-07-nasa-satellite-imagery-fabio-fizzling.html

An infrared image taken on July 6 at 7 a.m. EDT (11 UTC) by the Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard NASA's Aqua satellite showed no strong convection remained in Fabio. Coldest temperatures around Fabio's center were near minus 40 degrees Fahrenheit (minus 40 degrees Celsius) and were limited to a very small area.

Strong convection can be found when cloud top temperatures exceed minus 63 degrees Fahrenheit (minus 53 degrees Celsius), and MODIS imagery showed much warmer cloud top temperatures.