The National Hurricane Center has issued the last advisory on Nana, which has dissipated near the Guatemala-Mexico border, and is issuing advisories on Tropical Depression Omar, located about 400 miles east-northeast of Bermuda.

1. A non-tropical area of low pressure is located over the north-central Atlantic, about 600 miles south of Cape Race Newfoundland. This low is expected to move north-northeastward near 15 mph, and some slight subtropical or tropical development of this system is possible before it reaches cooler waters tonight.
* Formation chance through 48 hours...low...20 percent.
* Formation chance through 5 days...low...20 percent.

2. A broad area of low pressure located over the eastern tropical Atlantic several hundred miles west-southwest of the Cabo Verde Islands is producing disorganized showers and thunderstorms, while moving little. Gradual development is possible early next week once the larger tropical wave located near the Cabo Verde Islands passes to the north of the system on Sunday.
* Formation chance through 48 hours...low...20 percent.
* Formation chance through 5 days...medium...40 percent.

3. A tropical wave located near the Cabo Verde Islands is producing an extensive area of disorganized showers and thunderstorms. Development of this system is expected to be slow during the next couple of days while it moves west-northwestward at about 15 mph. After that, a tropical depression is more likely to form early next week over the central tropical Atlantic where environmental conditions are forecast to be more conducive for development.
* Formation chance through 48 hours...low...20 percent.
* Formation chance through 5 days...high...70 percent.

4. Another tropical wave is forecast to move off the west coast of Africa over the weekend. An area of low pressure is expected to form from the wave early next week. Gradual development of this low is then expected, and a tropical depression could form while it moves generally westward over the far eastern tropical Atlantic.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...medium...40 percent.

The axis of an 11 mph westward-moving tropical wave is along a line from north of the Leeward Islands southward to over Venezuela. Increased cloudiness with scattered to moderate showers and thunderstorms in some parts are noted over and or around some islands mainly from south of Guadeloupe to parts of St. Lucia and Barbados.

[Linked Image]

[Linked Image]

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