Civicane49's WunderBlog

Sonia moving inland over Sinaloa; heavy rainfall remains a primary threat

By: Civicane49, 9:33 AM GMT on November 04, 2013

Tropical Depression Sonia has moved inland over the coast of Sinaloa in Mexico and continues to bring a threat for heavy rainfall. As of the latest National Hurricane Center advisory, Sonia has maximum sustained winds of 35 mph and minimum barometric pressure of 1004 mb. It is moving north-northeastward at 9 mph. Satellite and scatterometer data indicate that the center of Sonia has reached the coast of Sinaloa. Now that the system has moved inland, rapid weakening is expected as it interacts with mountainous terrain and high southwesterly shear. I expect the cyclone to dissipate within 24 hours, if not sooner. Torrential rainfall capable of causing mudslides and flash flooding remains a main threat from this system. Potentially heavy rainfall is expected for the next 24 hours or so for portions of Sinaloa and Chihuahua. Sonia may bring an increase in moisture for the southern plains and southwestern United States by the next few days as it interacts with the approaching frontal boundary from the west.

Figure 1. Infrared satellite image of Tropical Depression Sonia. Image credit: NOAA/RAMMB.



Updated: 10:07 AM GMT on November 04, 2013


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