Flood Watch issued for San Antonio, Hill Country as heavy rain threat builds

A Flood Watch is in effect for San Antonio, the Texas Hill Country and much of South-Central Texas as forecasters warn that a slow-moving rain setup could bring dangerous flooding from Sunday evening through Tuesday evening.

The National Weather Service said the watch begins at 7 p.m. Sunday, June 14, and runs through 7 p.m. Tuesday, June 16. Local forecasts call for scattered thunderstorms that may move slowly and drop heavy rain in bursts rather than in a steady all-day pattern.

Rainfall totals are expected to vary widely. Most areas in the watch zone could see 1 to 3 inches of rain, but isolated spots may receive as much as 8 inches. At times, rainfall rates could exceed 2 to 3 inches per hour, which forecasters say could trigger flash flooding within minutes.

Where the watch applies

The watch covers the San Antonio metro area, the Hill Country and nearby communities, including Fredericksburg, Kerrville, Llano, New Braunfels, Pleasanton, Pearsall, Uvalde, Seguin, Eagle Pass and Del Rio.

Forecasters said the main threats include flooding in rivers, creeks, streams, low-lying areas, flood-prone roads and low-water crossings. The National Weather Service also warned that life-threatening flooding is possible somewhere in the watch area.

What is driving the threat

Local reporting says the setup is being driven by tropical moisture interacting with a weak summer cold front. That combination is expected to increase rain chances through the first half of the week, with the heaviest rain most likely late Monday into early Tuesday.

San Antonio rain chances were reported around 40% to 60% on Sunday, then near 80% Monday into Tuesday. The strongest storms could also produce wind gusts up to 50 mph and small hail.

What to watch next

Residents should watch for Flood Warnings if storms become more intense or if rain repeats over the same areas.

The most important next updates will come from the National Weather Service if the watch is expanded, shifted or upgraded. The key question through Tuesday evening is where the heaviest rain sets up and whether any flood-prone corridors see repeated downpours.