Thursday was the hottest day of the year so far, as much of South Texas saw heat index values, or humidity-driven “feels like” temperatures, rise to more than 110 degrees. Heading into the weekend on Friday, a weak summer cold front will push closer toward South-Central Texas. But the front will likely stall before truly moving through San Antonio, dropping city temperatures only by a few degrees.
While temps will hardly be affected, the weak atmospheric boundary will interact with the humid air in place, bringing an increase in storm chances over the next 24 to 36 hours. Some storms could produce isolated flooding. Here’s a close look at what you can expect.
Friday’s forecast
Early Friday, a few morning showers and thunderstorms might be ongoing across the Texas Hill Country, as rainfall continues to develop along the weak cold front moving in. Rain chances will be greatest (near 40%) in areas such as Kerrville, Fredericksburg, Junction and Rocksprings. San Antonio rain chances will be less than 20% in the morning.
Heading into the early afternoon, San Antonio rain chances will increase slightly, but storms are expected to stay isolated across the region, leaving many areas dry. Temperatures are expected to rise as high as 93 degrees, with heat index values expected to peak between 105 and 110 degrees.
Storm chances will increase by late Friday afternoon and into the evening, with about a 40% chance of storms expected in the San Antonio metro area. Then by late Friday night, storm chances will continue, as another potential cluster of storms forms to the west and progresses slowly eastward. Scattered storms might continue into the early morning on Saturday…