Another tropical wave, located south of the Cabo Verde Islands, is producing a large area of shower and thunderstorm activity. This system has become much better organized since yesterday and could become a tropical depression during the next couple of days before upper-level winds become less conducive for development. The disturbance is forecast to move westward to west-northwestward at 10 to 15 mph across the far eastern tropical Atlantic for the next several days. * Formation chance through 48 hours...medium...60 percent. * Formation chance through 5 days...high...70 percent.