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'Extremely dangerous' mile-wide tornado spotted in Texas

'Extremely dangerous' mile-wide tornado spotted in Texas (Image 1) (Copyright by WSLS - All rights reserved)

(NBC NEWS) - A slow-moving and "extremely dangerous" tornado was confirmed Sunday night in north-central Texas, much of which was under tornado watches and flash flood warnings as a storm system swept through with large hail and damaging wind gusts, the National Weather Service said.

After moving through the town of Rio Vista, the tornado moved east into rural parts of Johnson County, Emergency Management Director Jamie Moore told NBC News. The tornado was about a mile wide when it was first spotted, he said.

The twister was spotted about 10:44 p.m. near Covington and near Cleburne State Park, about 25 miles south of Fort Worth, according to the weather service. "This is a particularly dangerous situation," it said.

The weather service warned that flying debris could be deadly and that mobile homes were likely to be destroyed. Considerable damage to homes, businesses and vehicles is likely, and complete destruction is possible," it said.

Tennis ball-size hail was reported near Glen Rose and Dinosaur Valley State Park, while softball-size hail damaged several vehicles near Stephenville, 

The Weather Channel reported

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Roads were impassable across much of southern Johnson County and damage, including missing roofs, was reported in Rio Vista, but the full extent was not yet clear. Johnson County Sheriff Deputy Casey Torrey said that deputies were out checking on damage reports. There were no immediate reports of injuries.