June 1 (Bloomberg) -- Petroleos Mexicanos, the third- largest supplier of crude to the U.S., closed two oil export terminals in the Gulf of Mexico as Tropical Depression Arthur brought heavy winds and rain.

The terminals at the ports of Dos Bocas and Cayo Arcas are closed today, according to a statement on the Web site of Mexico's Merchant Marine.

Arthur, the first tropical cyclone of the year in the Caribbean, had winds of 56 kilometers an hour (35 miles an hour) and was moving to the west-southwest at 9 kilometers an hour as of 5:30 p.m. local time, the Merchant Marine said in a separate statement. It was centered over land 128 kilometers southeast of Isla del Carmen.

The storm will lose its status as a tropical depression as higher terrain breaks up its rotation, with winds dropping to 46 kilometers an hour before dawn, the U.S. National Hurricane Center said in a statement at 5 p.m. Miami time.

The storm dumped rain on southern Mexico as well as Guatemala and Belize. Heavy rains are predicted to continue in the area for two days, the Hurricane Center said.

By remaining over land, Arthur missed the Bay of Campeche and its Cantarell oilfield, where Petroleos Mexicanos produces 1.07 million barrels a day of oil. Early forecasts showed the storm could strengthen over the Bay of Campeche.

Arthur formed from the remains of Tropical Storm Alma, which took shape in the Pacific and flooded Managua, Nicaragua on its way to the Caribbean. The storm regained strength before its center crossed onto land again in Belize.

Tropical storms have winds of at least 63 kilometers an hour. Tropical depressions are tropical cyclones with weaker wind. Hurricanes have winds of at least 119 kilometers an hour.

To contact the reporter on this story: Andres R. Martinez in Mexico City at amartinez28@bloomberg.net; Steven Bodzin in Caracas at sbodzin@bloomberg.net.

Last Updated: June 1, 2008 19:43 EDT