Heavy rainfall could cause flash flooding Sunday

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Drier days are ahead this week after heavy rain moves out Sunday evening, according to the National Weather Service.

Between 1 and 3 inches of rain are expected through Sunday, NWS meteorologist Yvette Benavides said, but isolated areas could see up to 7 inches.

A flash flood watch was issued for all of South-Central Texas through 1 p.m. Sunday.

“It’s difficult to tell where the showers will actually pop up, and how long they’ll linger in one area, but the potential (for heavier rain) is there for the whole area,” Benavides said.

Rain over the last week has saturated the ground, increasing the likelihood of flooding, she said.

On Sept. 1, San Antonio was more than 7 inches behind its average rainfall totals for the year, but just a week later, it has exceeded that amount.

As of Saturday, the city had measured 21.97 inches of rain in 2018, just over the normal amount of 21.8 inches, Benavides said.

The outlook for the rest of the week is a little sunnier, with a much lower chance of rain through Friday if the cold front moves out as expected Sunday evening.

Showers should taper off Monday, she said. For Sunday night, though, there’s a 40 percent chance of rain.

Residual rain could fall throughout the week, but will likely be “very isolated during the daytime,” she said, with just a 20 percent chance of showers and thunderstorms through Thursday night, climbing to 30 percent on Friday.

The weather service was predicting temperatures with highs in the 80s and lows just above 70 degrees for the rest of the week.

LTeitz@express-news.net | @LizTeitz