U.S. weather forecasters say the first hurricane of the 2011 season has been downgraded to a tropical storm.

The National Weather Service says Adrian, off Mexico's Pacific coast, is weakening quickly. It said the storm's winds had dropped Saturday morning to 110 kilometers per hour.

The weather service said it anticipated Adrian to weaken below tropical storm intensity in the next 36 hours.

Adrian became a hurricane earlier this week over the Pacific Ocean near Mexico's western coast.

At last report, the storm's center was about 800 kilometers south of the southern tip of the Mexican state of Baja California, and it was moving west at 19 kilometers per hour.

The National Hurricane Center in Miami predicted large swells generated by Adrian would affect the southwestern coast of Mexico.

The National Oceanic and Atmospheric Administration, or NOAA, said in a recent report that this could be an “above-average” hurricane season, with as many as six to 10 hurricanes.

The Eastern Pacific hurricane season began May 15 and ends November 30. The Atlantic hurricane season began June 1 and also goes until November 30.