(WVUE) - The National Hurricane Center is keeping a close eye on a tropical wave over the northern Leeward Islands.
Showers and thunderstorms in Invest 99 have become more concentrated overnight and are showing signs of organization, but the system still appears to lack a well-defined circulation.
Although environmental conditions are currently only marginally conducive for additional development, this system could become a tropical depression at any time during the next few days while it moves west-northwestward at about 15 mph across the northern Leeward Islands, near or over Puerto Rico, Hispaniola, and the Bahamas.
The disturbance has a 60 percent chance of developing into a tropical depression in the next two days and an 80 percent chance in the next five days.
An Air Force Reserve Hurricane Hunter aircraft is scheduled to investigate the disturbance late this morning.
Gusty winds, heavy rains, and possible flash floods and mudslides are expected to occur over portions of the Leeward Islands, Puerto Rico, Hispaniola, and the southeastern and central Bahamas.
Please consult products issued by your local meteorological offices for further details. Interests in the northwestern Bahamas and Florida should also monitor the progress of this system.