Tropical Storm Igor swirls over open Atlantic, could reach hurricane strength by Sunday

Tropical Storm Igor swirls over open Atlantic

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 (995 kilometers) west of the Cape Verde Islands.

The storm’s maximum sustained winds Friday were near 45 mph (75 kph). It was moving to the west at 21 mph (33 kph).