Hurricane Irah - September 23-27, 1973
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
rainfall from Irah using data provided by the Comision Nacional del
parent agency of Mexico's national weather service.