Miami - A Hurricane warning has been issued as Carlos is expected to strengthen and increase its forward speed over coming days as it heads toward southwestern Mexico.The US National Hurricane Centre said the hurricane's eye was slowly drifting north on Saturday night and was about 170km south of the tourist resort of Acapulco and that Carlos' winds had increased to 140 kph. The center of the storm is expected to approach the coast of southwestern Mexico late on Monday, forecasters said.Mexico's government has issued a hurricane warning from Lazaro Cardenas to Tecpan de Galeana along Mexico's southwest mainland coast, meaning hurricane conditions were possible within that area within 48 hours.A hurricane watch is in effect for Punta San Telmo to the west of Lazaro Cardenas and a tropical storm warning is in effect for East of Tecpan de Galeana to Punta Maldonado. Carlos is expected to produce 2-4 inches of rain across the southwestern coast of Mexico through on Tuesday. These rains could cause life threatening flash floods and mudslides, forecasters said.Carlos is the third hurricane of the 2015 eastern Pacific season, and forecasters said hurricane-force winds extend outward from the eye about 35km. The centre also cautioned that ocean swells kicked up by Carlos will reach the coast in the warning and watch areas over the next days and could produce life-threatening surf and rip currents.