The National Weather Service is warning of several days of unsettled weather across Puerto Rico and the U.S. Virgin Islands, with heavy rainfall and hazardous seas expected through the weekend. Meanwhile,

Tropical Storm Melissa's speed has decreased dramatically, and that trend is forecast to continue. There is reasonably high consensus in the computer forecasts that the storm will creep generally north for the next few days.

Melissa may be struggling now, but it is expected to rapidly intensify. It's also going to be a slow mover into early next week. Here's what that means for its forecast.

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Tropical Storm Melissa has formed in the Atlantic and may further strengthen into a hurricane. ABC News meteorologist Kenton Gewecke has the latest forecast.

The National Hurricane Center is monitoring Invest 98L south of the U.S. Virgin Islands. While its path is uncertain, forecasters say conditions in the Caribbean may support development later this week,