https://phys.org/news/2018-09-nasa-areas-strength-tropical-storm.html

However, the Tropical Storm Watch for Rota, Tinian and Saipan has been canceled.  Because Tropical Storm Trami (28W) continues to move away from the Marianas the threat of damaging winds has ended.

At 2:20 a.m. EDT (0230 UTC) on Sept. 13, Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard NASA's Aqua satellite analyzed Hurricane Florence in infrared light. MODIS found coldest cloud top temperatures in two large areas. One was around the center of circulation and the other was in a thick band of thunderstorms wrapping into the low-level center. Those temperatures were as cold as or colder than minus 80 degrees Fahrenheit (minus 112 degrees Celsius). Surrounding them were powerful storms with cloud tops as cold as or colder than minus 70 degrees Fahrenheit (minus 56.6 degrees Celsius).