A weak tropical wave crossed the coast of Africa on the 7th of August and trekked
westward across the Atlantic and Caribbean.  Associated thunderstorm activity increased
as it entered the eastern Pacific ocean on the 16th.  A tropical depression formed 240 n mi
south of Manzanillo, Mexico on the evening of the 19th. Moving northwest, the depression
 strengthened  into a tropical storm on the 20th and a hurricane on the 22nd while rounding the
 western periphery of the subtropical ridge towards a trough situated on the West coast of the
 United  States.

The hurricane first made landfall in Baja California on the 23rd, striking mainland Mexico
 late that day.  Accelerating northeast, Lester entered Arizona as a tropical storm and New
 Mexico  as a tropical depression before ejecting out into the Plains.  Its mid-level center kept
 on a northeast coast while the surface low moved along a frontal bounday, leading to double
 rainfall maxima, which is seen on the rainfall graphic below. Its track is below, produced
 by the National Hurricane Center.

The graphics below show the storm total rainfall for Lester.  Data for the United States was provided by the
 National Climatic Data Center in Asheville, NC.  Data for Mexico was obtained from the Servicio Nacional
del Agua, the parent agency of Mexico's national weather service.