Published: Sep 16, 2010 4:44 PM EDT
Updated: Sep 16, 2010 1:44 PM EDT

MIAMI (AP) - Karl has become a hurricane in the Gulf of Mexico after dumping heavy rains on the Yucatan Peninsula as a tropical storm.

A hurricane warning was issued Thursday for Mexico's coast from Palma Sola to Cabo Rojo. Also, a tropical storm warning has been issued for the coast for north of Cabo Rojo to La Cruz and for the area south of Palma Sola to Veracruz.

Karl's maximum sustained winds are near 75 mph (120 kph). The National Hurricane Center in Miami says additional strengthening is possible and Karl could approach major hurricane strength before reaching Mexico's coast.

Karl is located about 310 miles (500 kilometers) east-southeast of Tuxpan, Mexico, and is moving west near 12 mph (19 kph).