The storm caused minimal inconvenience and damage when it came ashore just south of the U.S.-Mexico border.
But it later spawned flash flooding and a string of tornadoes that produced damage and forced evacuations northward to Oklahoma.
A total of six twisters touched down in metropolitan Dallas-Forth Worth late Wednesday, causing extensive damage in some locations.
One of the tornadoes skirted downtown Dallas, but the city spared any injuries or fatalities due to the freak spinup.
Tropical Storm Hermine Track
Satellite Loop Data: CIMSS