Her son, Julio, said teachers told students to crouch and cover their heads.
What's left behind
A tornado leaves intact the most absurd things sometimes. A cardboard box of tax returns sat on a pile of wood that was once someone's home.
One woman's bathroom was the only room untouched in her house, she said.
Though their home was obliterated, Kristina Daniel and her husband Donovan told a London Telegraph reporter that the only thing untouched in their home appeared to be an empty water bottle.
"You just wanna break down and cry," Steve Wilkerson told CNN, holding a laundry basket that contained the belongings he could find.
"But you know, that's how it goes," Wilkerson said, his voice shaking. "You gotta be strong and keep going."
He's lived in Oklahoma his whole life. He's seen tornadoes before, but nothing like this one.
"I still can't believe this is happening," he said. "You work 20 years, and then it's gone in 15 minutes."
Not far away, another woman was joyous when she got a text from her son, Cody, who started walking down a major street in Moore and saw his grandmother walking dazed along the road with her Yorkie.
"Grandma is fine," her son texted. "She is at my house. Mom, everything is gone. There is nothing left, anywhere. All of the pictures, all grandma's stuff, all my pictures, my letter jacket, my college degree from OU. There's nothing left."
In another part of Moore, Lando Hite was shirtless, his hair and body caked with mud, as he described what happened at a horse and entertainment farm.
"It was just like the movie 'Twister,'" he told CNN affiliate KFOR. "There were horses and stuff flying around everywhere."
The tornado slammed into the Orr Family Farm, which had about 80 horses. It damaged several barns; Hite was worried that most of the animals had been killed.
"I tried to let some of the horses out of their stalls so that they would have a chance," said Hite.
The building he took shelter in moved about 100 feet, he said, when the twister hit.
A woman told CNN that she saw a horse after the twister. The animal was bleeding, but alive.
It's personal for National Guard
Tuesday morning, Lt. Gov. Todd Lamb spoke to CNN affiliate KOKI from a Dick's Sporting Goods parking lot.
"I'm not a pessimist and I have a lot of faith and a lot of hope, but just with the enormity and severity of this storm..." he trailed off.