Tropical Storm the storm is projected to become a uncommon highest-level cyclone as it turns toward Jamaica, delivering dangerous rapid inundation and mudslides.
This weather system, which recorded winds of up to 120 mph as of 06:00 GMT, is currently turning northwest in the Caribbean region and is expected to reach land by early next week, based on data from meteorological authorities.
Warnings of electricity outages and structural damage have been announced as Melissa generates up to 76cm of precipitation and sea level surges as high as thirteen feet above typical tides. "Find safe refuge immediately," inhabitants have been urged.
Melissa is the thirteenth cyclone in this year's Atlantic storm period, which usually concludes in late autumn.
A highest-level cyclone is the strongest type, with winds of at least 157mph.
While Melissa is expected to reduce in intensity to a Category 4 cyclone before arriving at Jamaica, experts said there was "almost no noticeable change in the total effects" upon reaching the coast, and that the cyclone will be "equally strong" when it hits the nation.
With tropical storm-level gusts and precipitation anticipated well in advance long before it crosses Jamaica's central region - perhaps encompassing the capital, Kingston - alerts indicate that "safety measures need to be finalized quickly".
"A multi-day period of damaging winds and intense precipitation has started and will cause devastating and dangerous flash flooding and numerous landslides," counseled weather authorities.
Jamaican Prime Minister the official said: "I know that there are many Jamaicans who are worried, who are very concerned, and appropriately: concern is justified.
"Yet the most effective method to address nervousness and any apprehension and anxiety is to stay ready."
Locals are being advised to secure their homes with sandbags and wooden boards, and to accumulate basic necessities.
Advisories are also ongoing for areas in the neighboring country such as the capital, Port au Prince, the Dominican Republic and eastern Cuba, where the hurricane is expected to bring similar effects by the middle portion of the coming week.
Mudslides already being caused by the cyclone have already killed two in the country, according to emergency services.
Melissa is forecast to cross Cuba by Wednesday before traveling via the Caribbean archipelago and out into the Atlantic Ocean.
By the moment it makes contact with Cuba, it is anticipated to have reduced to a category three storm.
Although it is challenging to link particular meteorological occurrences to climate change, scientists say it is resulting in weather phenomena increasingly frequent and more severe.
Warmer oceans produce greater water vapor in the atmosphere, aiding in the development of tropical cyclones.
Prior to the commencement of this year's Atlantic hurricane season, meteorological authorities forecast higher-than-average occurrence, mentioning heated marine conditions and possible more intense weather patterns around the western African continent - where tropical systems typically originate.