Tropical Storm Melissa is barely moving through the Caribbean, and that’s exactly what makes it so dangerous. The longer it lingers, the more rain it dumps. Haiti, Jamaica and the Dominican Republic could face days of relentless downpours and mudslides.

Melissa had maximum sustained winds of 50 mph early Wednesday and was centered about 325 miles south-southwest of Port-au-Prince, Haiti.

Best-case scenario: “The best-case scenario for Florida would be if Melissa moves over eastern Cuba or Hispaniola and then gets pulled out to sea. That would spare Florida from impacts, though it would likely bring life-threatening and possibly catastrophic flooding to parts of Hispaniola, eastern Cuba, and the Dominican Republic."

Tropical Storm Melissa is crawling through the Caribbean Sea, threatening to unleash life-threatening flooding and mudslides across parts of the region later this week. It’s proof this year’s Atlantic hurricane season is not over yet,

Tropical Storm Melissa could become a dangerous hurricane in the Caribbean over the coming days. Meanwhile, a long-duration lake-effect rain event is unfolding across the Great Lakes.

Tropical Storm Melissa's forecast is filled with uncertainty, prompting some dire worst-case scenarios for Caribbean islands.

Lemmon, which is a rare green comet, can be seen with the naked eye on Oct. 21, according to the Royal Astronomical Society, with peak visibility near Halloween. SWAN may be visible using binoculars or a telescope, according to Starwalk, a real-time astronomical app for stargazing.