SAN ANTONIO – Editor’s note: The National Weather Service determined that an EF1 tornado with up to 100 mph winds was likely.
On Sunday night, both severe thunderstorm warnings and tornado warnings were ongoing around San Antonio after 7 p.m., when a squall line moved through the KSAT12 viewing area.
A “squall" is a line of storms that usually produces damaging wind gusts along the leading edge of the storms. Occasionally, quick spin-up tornadoes are embedded along the line. Therefore, it can be difficult to determine whether any storm damage is technically from a tornado or straight-line wind gusts -- especially when squall lines occur at night.
With radar indicated wind velocities of up to 80 to 90 mph Sunday night, damage was reported across northern Bexar County. This was especially true in the Wildhorse subdivision on the city’s northwest side.
Traveling through the neighborhood in the Storm Chaser, Meteorologist Justin Horne observed a roof ripped off of a house, windows shattered, and bits of trees and a fence post lodged in the siding of a garage.
Usually, the National Weather Service will send meteorologists to observe the damage patterns after an event to determine whether or not a tornado occurred. Our local Austin/San Antonio Weather Service office is currently in the process of determining when and if they will conduct a survey. We’ll be sure to keep you informed!
Memorial Day Forecast
- Map: Emergency road closures at low water crossings in San Antonio, Bexar County
- MAP: Current power outages in Bexar County
We’re not done with the chance for severe storms, yet. In fact, another squall line is expected late Monday with a risk for damaging gusts and flooding. Here’s what you need to know about Memorial Day’s forecast:
- After a round of scattered storms in the early morning, it will be generally quiet for most of Monday.
- A few isolated, pop-up storms will be possible during the day
- However, a line of storms will move through the KSAT 12 viewing area mainly after dinner
- This squall line will pose a threat for damaging wind gusts of more than 60 mph
- Flooding will also be an issue with any heavy downpours that occur because the ground is saturated from the more than 2 to 3 inches of recent rainfall
- Overnight, storms will move east of San Antonio with the severe threat coming to an end
WATCH the latest forecast from your KSAT Weather Authority Team:
Check out the latest satellite imaging tracking storms in the San Antonio area here:
- Click HERE for KSAT's interactive radar
- Click HERE for more from KSAT's Weather team, Your Weather Authority
Continued Weather Coverage
Stick with KSAT 12 News, your Weather Authority for the latest weather updates.
- Read more: CPS Energy offers power outage tips
Keep up with the latest alerts from the KSAT Meteorologists with their Twitter stream below: