On Sunday morning, storms began firing up west of the Metroplex around 6 a.m.
The NWS issued a Severe Thunderstorm Watch until 8 p.m. Sunday for Delta, Fannin, Henderson, Hopkins, Hunt, Kaufman, Lamar, Navarro, Rains, Rockwall and Van Zandt Counties.
The National Weather Service also issued a Wind Advisory for Tarrant and Denton counties as well as points to the west from 10 a.m. to 7 p.m.
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The Storm Prediction Center in Norman, Okla., said there could be "quite a bit" of severe weather on Sunday afternoon and into the evening.
Central Arkansas, including the Little Rock area, is at the highest risk of severe storms later Sunday, the NWS said.
Forecasters also asked people to be alert Sunday for possible tornadoes in a wide swath of the Midwest and south, stretching from Omaha, Neb., south to Texas and east to northern Louisiana and Mississippi.
"The greatest risk for a few intense tornadoes will exist across much of Arkansas perhaps into western and central Missouri," a weather service advisory said.
Earlier Sunday, severe storms forced organizers to delay the Oklahoma City Marathon just before runners were set to take the course. The National Weather Service issued a severe thunderstorm warning for downtown Oklahoma City, where the 26.2-mile race starts. It warned of wind gusts to 50 mph and quarter-sized hail.
Sunday's race was scheduled to start at 6:30 a.m., but inclement weather that formed west of the city moved into the area around sunrise. Organizers said they would push the race back by at least 90 minutes to let the storm move through. Downtown buildings opened to provide shelter to the runners
Next week, temperatures in North Texas are expected to be considerably cooler, in the 70s.