A tropical disturbance first formed southeast of Acapulco on September 20th. The system moved westward,
organizing into a tropical depression on the 21st and tropical storm that evening. The cyclone turned to the northwest
well to the west of Manzanillo, slowing in forward motion as it attained hurricane strength on the 23rd. Recurving
towards and north and northeast, Irah became a strong category 2 hurricane before slowly weakening. It struck
southern Baja California on the 25th as a minor hurricane. Weakening continued, and the tropical storm crossed the
Gulf of California, striking the Mexican mainland northwest of Los Mochis as a weak tropical storm on the 26th.
The graphics below show the storm total rainfall from Irah using data provided by the Comision Nacional del Agua,
parent agency of Mexico's national weather service.
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