Hurricane Stan was a relatively weak but deadly tropical cyclone that affected areas of Central America in early October 2005. The eighteenth named storm and eleventh hurricane of the 2005 Atlantic hurricane season, Stan formed from a tropical wave on October 1 after it had moved into the western Caribbean Sea. The depression slowly intensified, and reached tropical storm intensity the following day, before subsequently making its first landfall on the Yucatán Peninsula. Traversing the peninsula, the tropical storm weakened, but was able to re-intensify once it entered the Bay of Campeche. Under favorable conditions for tropical development, Stan attained hurricane strength on October 4, and later reached peak intensity with winds of 80 mph (130 km/h) and a minimum barometric pressure of 977 mbar (hPa; 28.85 inHg). The hurricane maintained this intensity until landfall near Punta Roca Partida, Mexico later the same day. Once over the mountainous terrain of Mexico, however, Stan quickly weakened, and dissipated on October 5.