Some additional strengthening is possible during the next 12 to 24 hours while Melissa is south of Jamaica over waters of high oceanic heat content and in an environment of relatively low wind shear.
Fluctuations in intensity are also possible during this period due to internal dynamics related to eyewall replacements, which are
generally difficult to forecast. There's really no practical difference in Melissa making landfall in Jamaica at category 4 or 5 intensity, since both categories can produce catastrophic wind damage. In addition, winds in the mountains of Jamaica are likely to be higher than the winds at sea level, and are likely to add to the seriousness of the situation. Although interaction with Jamaica will lead to some weakening, Melissa is expected to reach southeastern Cuba as a major hurricane, and will also move across the southeastern Bahamas and be near Bermuda as a hurricane.