8:00 PM CDT | October 21, 2017
Scattered Strong to Severe Thunderstorms are ongoing in Northwest Texas this evening. This activity is expected to form into a squall line over the next couple of hours and track eastward through North Texas. The primary hazard with the line will be Damaging Winds, followed by Large Hail and isolated, brief Tornadoes. Isolated storms are trying to develop ahead of this activity in western North Texas. It is uncertain whether this activity can become rooted at the surface, but any storm that manages to do so ahead of the line could quickly become supercellular. The squall line should approach the I-35/35W corridor between 10:00 and 11:00 PM. As mentioned on the Facebook page earlier today, there is the possibility that we could see a brief uptick in the Damaging Wind/Tornado Threat as the line moves into the I-35 corridor and encounters deeper moisture. If the cap does not fully erode, then the Tornado Risk will be low but non-zero.
A Severe Thunderstorm Watch is in effect for portions of North Texas until 2:00 AM. I urge those in or near the risk areas to have a way to get the latest watch and warning information from the National Weather Service through tonight. Not everyone will see Severe Weather, but the potential exists for many.