Hurricanes will strike land this weekend by two different oceans

Two hurricanes will strike land this weekend by two different ocean basins - Tammy in the Atlantic and Norma in the eastern Pacific.

Neither are a threat to the US, but Norma has triggered hurricane warnings for Mexico, including the popular resort town of Cabo San Lucas, and Tammy for portions of the Leeward Islands, a chain of several island nations between the Caribbean Sea and the open Atlantic.

Tammy strengthened into a hurricane with sustained winds of 75 mph on Friday morning and is forecast to continue slowly strengthening as it tracks through the Leeward Islands. Hurricane-force winds extend outward up to 25 miles from the storm's center and tropical storm-force winds extend outward up to 140 miles.

Hurricanes in this part of the Atlantic are rare for late October. Tammy is only the third hurricane to form this far southeast in the Atlantic since 1900, according to hurricane expert Michael Lowry.

It's also the latest-forming hurricane in this part of the Atlantic since 1966, according to Phil Klotzbach, a research scientist in the Department of Atmospheric Science at Colorado State University.

Hurricane experts previously warned hurricanes could form in unusual areas later in the season this year because of the exceptionally warm Atlantic Ocean.

Hurricane conditions, including strong winds and heavy rain, are expected in the Leeward Islands by late Friday and into early Saturday. A storm surge of 1 to 3 feet is forecast for the islands.