https://phys.org/news/2018-09-aqua-satellite-florence-temporarily.html

Infrared satellite data at 1:20 a.m. EDT (0520 UTC) on Sept. 7, from the Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard NASA's Aqua satellite showed coldest cloud top temperatures near minus 63 degrees Fahrenheit (minus 53 degrees Celsius) around Florence's center and in a band of thunderstorms northeast of center.

NHC forecaster Zelinsky said "Florence's structure continues to be negatively affected by strong southwesterly [wind] shear. Cloud tops have generally warmed over the past 6 hours, and recent microwave data show that the low-level circulation center of Florence is displaced nearly 20 nautical miles to the southwest of the mid-level center."