000 ABNT20 KNHC 230554 TWOAT TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 200 AM EDT TUE AUG 23 2016 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The National Hurricane Center is issuing advisories on Tropical Depression Fiona, located several hundred miles north-northeast of the Leeward Islands, and on recently upgraded Tropical Storm Gaston, located about 450 miles west-southwest of the Cabo Verde Islands. A tropical wave located about 400 miles east-southeast of the Leeward Islands is producing widespread cloudiness and thunderstorms. Conditions are marginally conducive for gradual development while the disturbance moves west-northwestward to westward at 15 to 20 mph. Environmental conditions are expected to become more conducive for a tropical depression to form by late this week when the system is forecast to move near Hispaniola and Puerto Rico, and the southeastern and central Bahamas. An Air Force Reserve Hurricane Hunter aircraft is scheduled to investigate this system later this morning. Interests in the central and northern Lesser Antilles, the Virgin Islands, and Puerto Rico should monitor the progress of this system. * Formation chance through 48 hours...medium...60 percent * Formation chance through 5 days...medium...60 percent && Public Advisories on Gaston are issued under WMO header WTNT32 KNHC and under AWIPS header MIATCPAT2. Forecast/Advisories on Gaston are issued under WMO header WTNT22 KNHC and under AWIPS header MIATCMAT2. $$ Forecaster Stewart