The National Hurricane Center is issuing advisories on Hurricane Danielle, located about 950 miles west of the Azores, and on Tropical Storm Earl, located about 125 miles north-northwest of the Virgin Islands. 1. Eastern Tropical Atlantic: A tropical wave located southeast of the Cabo Verde Islands is producing some disorganized shower and thunderstorm activity. An area of low pressure could form in association with this system during the next day or two, and subsequent gradual development is possible as it moves generally west-northwestward over the eastern and central tropical Atlantic during the next several days. * Formation chance through 48 hours...low...10 percent. * Formation chance through 5 days...low...30 percent.