(CNN) The Bahamas missed the brunt of Tropical Storm Humberto, which is expected to become a hurricane Sunday.

northwest of Great Abaco Island and 170 miles (270 km) east of Cape Canaveral, Florida, late Sunday afternoon, according to Humberto is moving away from the Bahamas and was about 210 miles (335 km)northwest of Great Abaco Island and 170 miles (270 km)east of Cape Canaveral, Florida, late Sunday afternoon, according to the National Hurricane Center.

The storm's maximum sustained winds are 70 mph and it is moving at 6 mph, according to the center. The storm is slowly strengthening and is expected to become a hurricane Sunday night, the center said in its latest update.

The storm is forecast to continue moving away from the Bahamas and remain well offshore of Florida's east coast through Wednesday, the center said. The storm will generate swells that will affect the northwestern Bahamas and the US coast from east-central Florida to North Carolina during the next few days. The swells could cause life-threatening surf and rip current conditions, forecasters say.

Tropical Storm Humberto is expected to become a hurricane Sunday but is forecast to avoid the Bahamas and the southeast coast of the US.

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