Texas has the two types of tornadoes that can happen everywhere else: supercell tornadoes and landspouts. See the related link for details on this.
In terms of intensity Texas has had tornadoes of all levels from F0 to F5.
There appear to be two candidates for the worst tornado to hit Texas in 2011.
The first was an EF1 in the town of Robston on January 9 that caused about $5 million in damage.
The other was an EF2 on April 26 that formed in Panola County, but the worst of the damage appears to have been in Louisiana.
A more definitive answer can be provided when the annual SPC tornado report for 2011 is released in early March.
every category of tornadoes hit Texas
Yes. In fact northeastern Texas is in Tornado Alley.
A number of Texas towns were hit by tornadoes in 1964. The town of Wichita Falls was hit by an F5 tornado.
The tornado that hit Waco, Texas struck in 1953.
The last tornado to hit Killeen, Texas was an EF1 on May 25, 2007.
Tornadoes hit Texas in almost every month of every year.
As of May 13, 2015 the last tornado to hit Texas this month was the second of two EF0 tornadoes near Jefferson on the night of May 10. It was at least four tornadoes to hit Texas on that day. This will likely not be the last tornado to hit Texas in May 2015.
The last tornado to hit Kileen was an EF1 on May 25, 2007.
Yes. McAllen, Texas has been hit by a few weak tornadoes.
In terms of actual type, the tornado that hit near Taylor was probably a supercell tornado. In terms of strength, it was rated F2.
Yes. Eagle Pass, Texas was hit by an EF3 tornado on April 24, 2007 that killed 7 people.
The last F5 tornado to hit Texas struck the town of Jarrell on May 27, 1997.
Yes. Duncanville, Texas was hit by an F2 tornado on April 20, 1977.