The initial tropical depression formed well southwest of Mexico on September 14th. Rapid intensification ensued
on the 16th, with Norbert becoming a hurricane by afternoon. After moving in an anticyclonic path within a weak
steering pattern, an upper level trough developed across western Mexico between the 19th and 22nd, luring Norbert
to the east and northeast. By the 23rd, ridging built in across the southern Plains, turning the storm north-northwest
not too far offshore the Mexican coast. The system weakened as it moved over cooler waters offshore Baja California,
and Norbert made landfall as a weakening tropical storm very early on the 26th. Its remnant circulation aloft and its
related thunderstorm activity sheared northeastward ahead of a trough moving through the Southwestern United
States, moving out of Mexico early in the morning of the 27th. The graphics below show the storm total rainfall for
Norbert. Data was provided by the Comision Nacional del Agua, parent agency of the Mexican national weather
service.
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