1. A westward-moving tropical wave just inland over Africa is producing
a large area of disorganized showers and thunderstorms. The wave is
expected to move off of the west African coast later today.
Environmental conditions appear somewhat conducive for gradual
development, and a tropical depression could form over the eastern
tropical Atlantic by late Sunday or early next week while the system
moves westward to west-northwestward at about 15 mph.
* Formation chance through 48 hours...low...20 percent.
* Formation chance through 5 days...medium...60 percent.
1. A tropical wave near the west coast of Africa is producing a large
area of disorganized showers and thunderstorms. The wave is expected
to move off the coasts of Senegal, The Gambia, and Guinea-Bissau
later tonight. Environmental conditions appear somewhat conducive
for gradual development, and a tropical depression is likely to form
over the eastern tropical Atlantic south of the Cabo Verde Islands
by late Saturday or early Sunday while the system moves westward
to west-northwestward at about 15 mph.
* Formation chance through 48 hours...medium...40 percent.
* Formation chance through 5 days...high...70 percent.
1. A large area of disorganized cloudiness and thunderstorms located a
few hundred miles south of the Cabo Verde Islands is associated with
a tropical wave interacting with a broader surface trough.
Environmental conditions appear somewhat conducive for gradual
development over the next several days, and a tropical depression
could form late this weekend or early next week while the system
moves generally west-northwestward across the tropical Atlantic.
* Formation chance through 48 hours...low...30 percent.
* Formation chance through 5 days...medium...60 percent.
3. Showers and thunderstorms associated with a broad area of low
pressure located about a hundred miles west of the southwesternmost
Cabo Verde Islands have diminished since yesterday. Strong
upper-level winds and cooler waters are expected to prevent the
development of this system while it moves toward the west or
west-northwest.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...low...near 0 percent.