However, several forecast models showed Shary becoming a hurricane within 36 hours, which at the time the NHC regarded as "highly unlikely given the very strong shear and cool sea surface temperatures forecast".[8][9] Nevertheless, data from a Hurricane Hunters flight revealed a drop in minimum central pressure and an increase in maximum wind speeds; convection re-fired later that day, quickly expanding over the eastern side of the cyclone.[10] During the overnight hours, thunderstorm activity further amplified and deepened symmetrically near the center, supported by the development of a small eye feature as noted on microwave images.