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Tropical Storm Igor Strengthens in Atlantic

Tracking Tropical Storm Igor

Cone predicts path of Tropical Storm Igor. (

MIAMI --Tropical Storm Igor is strengthening some as it swirls across the open Atlantic Ocean.

The U.S. National Hurricane Center in Miami says the storm could become a hurricane by Sunday. Igor remained far from land and was about 620 miles west of the Cape Verde Islands.

The storm's maximum sustained winds Friday were near 45 mph. It was moving to the west at 21 mph.

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