Track powerful Hurricane Polo's path
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Tropical Storm Hanna formed in the central subtropical Atlantic Ocean on Monday, Sept. 28, according to the National Hurricane Center.
Nolo is expected to become a hurricane sometime Thursday, and could become a major hurricane by the weekend as it approaches Hawaii's Big Island.
Forecasters warn Lowell could be near major hurricane strength as it moves close to the western Hawaiian Islands next week.
The Category 3 storm is expected to hit the Mexican mainland after lashing the state of Baja California Sur with heavy rains, potentially causing dangerous flooding and mudslides.