Flash flood watch
The National Weather Service Austin-San Antonio has issued a flash flood watch for the following counties: Atascosa, Bastrop, Bexar, Blanco, Burnet, Caldwell, Comal, De Witt, Fayette, Gonzales, Guadalupe, Hays, Karnes, Kendall, Lavaca, Lee, Travis, Williamson, and Wilson. The watch will be in effect through 7 a.m. Thursday, June 18. A flash flood watch means flash flooding is possible in or near the watch area.
There are two periods of concern for flash flooding across central and eastern portions of South Central Texas through the next 72 hours. The first period will be mid-morning today, June 15, through midnight, and the second and much more impactful period late Tuesday through early Thursday.
For June 15, ongoing tropical showers moving over the region with additional coverage and intensity are expected this afternoon. Localized 1-3 inch pockets with isolated 4 inches could be possible through midnight tonight.
The more impactful period of heavy rainfall leading to flash and river flooding will be from mid-day Tuesday, June 16, through Thursday morning, June 18, as a tropical wave shifts across the region. Widespread additional rainfall amounts of 2-4 inches with localized 6-8 inches will be possible.
High flash flooding and river flooding impacts could be possible mid-day Tuesday into Thursday morning from a landfalling tropical disturbance. Area rivers and creeks will not be able to take much run-off before becoming bank-full and over topping.
If rainfall amounts of 6-8 inches or higher occur, lingering river flooding impacts will remain through the next week or longer. Use extra care on low-water crossings or if residence is near a creek or river.