From the National Weather Service:
…Strong to Severe Storms Possible Saturday Night…
Area of Concern:
Hill Country and along and east of the I-35 corridor.
Threats & Impacts:
Winds: Damaging straight-line winds in excess of 60 mph possible.
Hail: Hail 1-2″ in diameter possible.
Rainfall: 1/4 to 1 inch with isolated pockets up to 2 inches
Timing and Overview:
Not too many changes in the models since yesterday. An upper level system and associated surface cold front will bring a chance of storms to portions of South Central Texas Saturday evening and overnight. A few isolated storms could be possible near and east of I-35 as early as Saturday afternoon. However the best chance of storms will come between 8 PM and Midnight Saturday evening across the Hill Country and I-35 corridor and 10 PM to 2 AM east of I-35. Some storms will be capable of producing large hail and damaging straight-line winds. The Storm Prediction Center continues to place portions of the area in a Slight to Enhanced risk for severe storms for mainly Saturday night (see attached graphic).
In addition, frequent cloud to ground lightning will be possible. Due to the progressive nature of this storm system the threat for widespread heavy rainfall and flooding is minimal. Rainfall amounts will average 1/4 to 1 inch. A few pockets of 1-2 inches of rainfall will be possible east of I-35 and north of I-10. Much lesser amounts of rainfall will occur out near the Rio Grande.