Flash Flood Warning: Avoid Travel in San Antonio on Early Wednesday

4:40 a.m. Update: A A flash flood alert has been announced. For much of Bexar County, along with sections of Kendall and Comal counties, many areas within the San Antonio metropolitan region fall under this advisory until 7:30 a.m. Wednesday, according to an announcement from the National Weather Service.

The National Weather Service has stated that the forecasted precipitation for the warning zone could add another 1 to 3 inches of rain. This increase is expected to result in flash floods affecting creeks, streams, urban zones, major roads, city streets, and highway underpasses.

Journeying through the warned region is strongly discouraged. However, should you have to go, exercise utmost care. In case of flooded roads, make sure to turn back and choose another path. Driving during nighttime is particularly risky since it becomes more difficult to discern when floodwaters inundate the streets.

Here is the day-by-day prediction for Wednesday, May 28.

Mother Nature has ultimately reversed the situation. For most of May, Extreme drought plagued South Texas. , along with unprecedentedly high temperatures. Over the last several days, the weather pattern shifted, leading to this result. intense rainfall accompanied by somewhat lower temperatures.

The current spell of rain might persist. In the coming days, the San Antonio region can expect intermittent showers and thunderstorms. Although the precipitation could be less extensive than what we experienced earlier this week, a handful of intense to extreme thunderstorms are expected to form over Central and South Texas. Here’s what you should anticipate.

Wednesday’s forecast

It wouldn’t be unwise to take an umbrella with you when you head out Thursday morning. Lingering overnight rain and thunderstorms might continue during your Thursday rush hour commute, so allow some additional time for your journey to work. In case you come across wet pavements or flooded streets, use caution and take it slow.

Morning storm chances will be around 50% in the San Antonio metro area, so not everyone will see rain. Some storms could produce gusty winds and small hail, but widespread severe weather is not expected.

There should be a pause in the rain by late morning and into the early afternoon, with San Antonio potentially catching glimpses of sunlight. The temperatures will gradually rise, reaching highs between the middle to upper 80s during the later part of the day.

More storm opportunities are anticipated in the late afternoon and evening for San Antonio and nearby regions. However, these storms will be spotty, covering roughly 40% of South Central Texas.

San Antonio faces a Level 1 risk out of 5 for severe weather conditions. Even though this represents the least concerning category as designated by the Storm Prediction Center, it indicates that some scattered regions might experience hail as large as quarters along with winds reaching up to 60 miles per hour.

Later this week

Thursday Rain probabilities will slightly diminish over the area, yet we'll continue to experience around a 30% likelihood of isolated showers and thunderstorms during the latter part of Thursday afternoon and into the evening.

The temperatures will be pleasant without being excessively high. The early morning lows around 70 degrees will rise to about 85 to 86 degrees by the later part of the day, which aligns closely with what’s typical for late May. Humidity levels will be quite elevated, causing heat index readings to climb up to between 93 and 97 degrees.

Friday: A mild cold front is anticipated to pass through South Texas throughout the morning hours. Although this front will bring down temperatures slightly, highs in San Antonio should still remain well within the mid-80s range. There’s also a possibility of some scattered showers and thunderstorms accompanying the front; however, the likelihood of rainfall stands at approximately 20%.

This weekend: Friday’s front may send low temperatures into the upper 60s early Saturday morning. The cool weather will be short-lived though. High temperatures are likely to reach the upper 80s on Saturday, before rising back into the 90s for Sunday and into early next week.