Tropical Storm Norma was the 15th named storm of the 2005 Pacific hurricane season. It formed from a large low-pressure region located southwest of Manzanillo, Colima, Mexico; the disturbance strengthened into a tropical depression on September 22, and reached tropical storm status four hours later. Convection increased as the storm developed some banding features and its reached peak intensity on September 24. Norma became more scattered as eastern wind shear caused it to become disorganized. The storm's intensity continued to reduce on September 25, and weakened to tropical depression level later the next day. The depression dissipated to a remnant low on September 27, continuing to drift northwestward. It traveled weakly in a circle, finally diminishing on October 1.