Cloud top temperatures in storms within Tropical Cyclone Uriah grew colder over the final couple of days,according to infrared imagery from NASA's Aqua satellite. That's an indication of stronger uplift in a tropical cyclone and a stronger storm. NASA-NOAA's Suomi NPP satellite saw the storm when it was struggling against wind shear, and two days later NASA's Aqua satellite saw Uriah reach hurricane-strength after the shear weakened.
Source: phys.org