From the National Weather Service:
Public Information Statement National Weather Service Austin/San Antonio TX422 PM CDT Sun May 20 2018 NWS DAMAGE SURVEY FOR 05/20/18 TORNADO EVENT... Leander Tornado... Rating: EF1 Estimated Peak Wind: 90 mph Path Length /statute/: 5.14 miles Path Width /maximum/: 50 yards Fatalities: 0 Injuries: 0 Start Date: 05/20/2018 Start Time: 08:22 AM CDT Start Location: 3 NE Leander / Williamson County / TX Start Lat/Lon: 30.5905 / -97.8241 End Date: 05/20/2018 End Time: 08:43 AM CDT End Location: 4 E Liberty Hill / Williamson County / TX End Lat/Lon: 30.6634 / -97.8391 Survey Summary: A National Weather Service storm survey concluded that at approximately 822 AM this morning a weak tornado touched down near Hero Way on the north side of Leander. Roof and tree damage was found just north of this road at several residences. The tornado then tracked north and went parallel to Ronald Reagan Boulevard where tree damage was observed on the west side of the road. The tornado then crossed Highway 29, weakened considerably, and finally dissipated near the entrance of the Santa Rita Ranch subdivision. The final rating of the tornado is EF1 based on the roof and tree damage seen around Hero Way. The remainder of the tornado track saw weak EF0 damage. EF Scale: The Enhanced Fujita Scale classifies tornadoes into the following categories: EF0...Weak......65 to 85 mph EF1...Weak......86 to 110 mph EF2...Strong....111 to 135 mph EF3...Strong....136 to 165 mph EF4...Violent...166 to 200 mph EF5...Violent...>200 mph NOTE:The information in this statement is preliminary and subject to change pending final review of the event and publication in NWSStorm Data.