000 ABNT20 KNHC 231751 TWOAT TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 200 PM EDT SUN AUG 23 2015 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The National Hurricane Center is issuing advisories on Tropical Storm Danny, located a couple of hundred miles east of the Leeward Islands. A low pressure area located several hundred miles south of Nova Scotia is producing disorganized showers and thunderstorms. While the circulation of this system has become somewhat better defined since yesterday, subtropical or tropical cyclone development is unlikely because it is expected to merge with a frontal system while it moves generally northward during the next day or so. * Formation chance through 48 hours...low...near 0 percent * Formation chance through 5 days...low...near 0 percent Satellite data indicate that the circulation associated with a low pressure system located about 800 miles west of the Cape Verde Islands has become better defined since yesterday. Shower and thunderstorm activity associated with this low has also become better organized. Environmental are conducive for additional development, and a tropical depression is likely to form before mid- week while the wave moves quickly westward at around 20 mph. By late this week, atmospheric conditions are expected to become less favorable for tropical cyclone formation. * Formation chance through 48 hours...high...70 percent * Formation chance through 5 days...high...80 percent Another tropical wave moving off of the west coast of Africa is accompanied by disorganized showers and thunderstorms. Environmental conditions are expected to be only marginally favorable for development while this disturbance moves generally westward over the tropical Atlantic Ocean at 15 to 20 mph this week. * Formation chance through 48 hours...low...near 0 percent * Formation chance through 5 days...low...20 percent $$ Forecaster Kimberlain