MEXICO CITY: Hurricane Sandra, the strongest storm on record this late in the Pacific hurricane season, decreased from Category 4 to 3 Thursday and was expected to weaken further before hitting Mexico this weekend, forecasters said. According to Mexico’s national weather service, SMN, Sandra was “gradually weakening and continues moving northward,” SMN said, with sustained winds of 195 kilometers per hour. Sandra reached Category 4 earlier Thursday. It was expected to continue losing strength before making landfall as a tropical storm on late Friday or early Saturday. The Pacific hurricane season, which runs from May to the end of November, has produced 18 named storms.