Gulf Disturbance Awaits Texas on Friday: Where Rain Chances Loom Large

A weak atmospheric disturbance in the Gulf of Mexico, as seen from the GOES-19 weather satellite on Thursday, will send some moisture into South Texas on Friday. This system is the result of a complex interplay between high and low-pressure systems, with the former dominating the region. As a result, the past couple of days have brought some of the hottest temperatures of the year to San Antonio, with the city hitting 100 degrees on Wednesday and topping out at 102 degrees on Thursday. But slight changes are expected to the weather, courtesy of a disturbance moving into the area from the Gulf of Mexico. This disturbance is extremely weak, but it still could bring a slight chance of rain to parts of South and Southeast Texas, as well as increasing cloudiness and slightly lower temperatures.

While the disturbance is expected to bring some much-needed rain to the region, it's worth noting that the rain chances will be greatest along the Texas coast, particularly in Rockport, Victoria, and Houston. Rain chances will be around 20% to 30% in these areas, with scattered showers and storms expected to develop Friday afternoon over the Gulf of Mexico. Some of this activity could move inland into Texas, but the rain chances will be slim, with only around 10% to 20% expected in San Antonio. The best chance of rain, albeit slim, is expected between 3 p.m. and 6 p.m., with a few isolated storms possible, capable of producing brief downpours and lightning.

High atmospheric pressure is expected to strengthen over Texas during the weekend, leading to more hot and dry weather. San Antonio is likely to experience peak daytime temperatures of 99 degrees on Saturday, potentially rising to the 100-degree mark on Sunday. Humidity-driven heat index values of up to 106 degrees are also possible each afternoon. It's worth noting that this heat is not unusual for the time of year, but it's still a reminder to take necessary precautions to stay cool and hydrated.

Few changes are anticipated through much of next week, with temperatures continuing to hover in the upper 90s to near 100 degrees each day, while morning temperatures will continue to hover in the upper 70s. Expect little to no chance of rain across the south half of the state through the entire work week. However, some changes in the forecast may finally become possible by next weekend, specifically around Aug. 22-25, as high air pressure finally weakens more significantly, leading to increasing rain chances and cooler temperatures.

The Gulf disturbance will bring some much-needed moisture into the region, but it's not expected to have a significant impact on the drought situation. According to the US Drought Monitor, the majority of Texas is still experiencing some level of drought, with the worst conditions found in the western part of the state. While the rain will be a welcome relief to many, it's worth noting that it will only be a temporary reprieve, and the drought conditions are expected to persist through the summer.

As we look ahead to the rest of the summer, it's clear that the weather will be a major topic of discussion. With the El Niño-South Oscillation expected to continue strengthening, we can expect a more active weather pattern for the region. This could lead to a busier storm season, with more showers and thunderstorms developing. But that's a story for another time.