A surge of tropical moisture that has already caused flooding across parts of Texas will continue heading eastward across the South into Monday, targeting areas from the lower Mississippi Valley into Georgia.
The culprit behind the wet weather this weekend has been tropical moisture associated with what used to be Tropical Storm Olaf in the eastern Pacific. This moisture surged across northern Mexico and into Texas early in the weekend, fueling heavy rain and thunderstorms.
While the rain has been beneficial to the parts of Texas still suffering a long-term drought, it has also been problematic. Some hard-hit drought areas between San Antonio and Austin picked up between 6 and 8 inches of rain by Sunday morning.
San Antonio had already set a new record daily rainfall record for Sunday with nearly 5.5 inches of rain having fallen by 8 a.m. Before this weekend, San Antonio had only received about 50 percent of normal rainfall since Jan. 1, 2008. Rainfall Saturday into Sunday morning has helped to bring that percentage up by at least 7 percent.
Despite the benefits, the rain has caused short-term problems with flooding ensuing across this portion of south-central Texas. Water was sent flowing over roadways, including portions of Interstate 35. High water rescues became necessary in a few areas.
While showers and storms will linger over Texas into Monday, the heaviest rain will continue shifting eastward across the South, spanning from central and northern Mississippi into northern and central Georgia tonight. Rainfall totals will reach 2 to 4 inches across the lower Mississippi Valley.
In addition to slow travel, including along Interstate 20, road closures could result in the hardest-hit areas. Low water crossings will be the most susceptible. People traveling by air can also anticipate some flight delays into early Monday.
Flooding could remain a concern for Southerners throughout the upcoming week as a series of fronts bring more waves of stormy weather to the region.
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