A Severe Thunderstorm Watch is currently in effect for areas in the western third of San Antonio and along I-35 from Bexar County until 11:00 PM. This weather alert comes as an upper-level disturbance approaches the region, leading to scattered showers and thunderstorms. The first wave of rain has already moved through Bexar County, with further rain expected throughout the evening.
Severe weather conditions, characterized by high parameters of instability and shear, means that there is a slight chance of isolated strong to severe storms, particularly around Bexar County until 9 PM. However, the likelihood of warnings being issued seems to favor areas further west or south in the next few hours.
The primary hazards associated with this watch include large hail and damaging wind gusts, along with a low risk of isolated tornadoes closer to the Rio Grande, as indicated by the Storm Prediction Center’s forecasts.
Rainfall amounts in Bexar County are projected to range between .01″ to over .50″, with pockets of heavier rainfall possible, particularly in the western parts of the region, where isolated areas may exceed .50 inches. The heaviest rainfall is expected to occur between 5 PM and 9 PM.
As the storms move out overnight, only light sprinkles or showers are anticipated until around 4 AM. Looking ahead to Friday, the weather is expected to improve with a partly sunny sky. However, due to the upper-level system still being nearby, there is a 20% chance of isolated showers or weak thunderstorms popping up.
This situation serves as a reminder of the unpredictability of spring weather, but staying informed and prepared can help mitigate risks associated with severe storms.