Julie Leach discovered she had the winning ticket in a McDonald's drive thru. PHOTO: NBC News.

 She was having a bad night at work when Julie Leach found she had won the USA Powerball jackpot.

The 50-year-old shift worker at a fiberglass factory quit her job on the spot.

"I'm still in disbelief," Leach told the Detroit Free Press. "I'm overwhelmed. I was having a really bad night at work, and I thought I better check my numbers."

She didn't sleep for 30 hours after the windfall because of the excitement.

Joanna Bailey, assistant manager of the Three Rivers-West Shell station where Leach bought her winning ticket.

Leach said she was on her third-shift lunch break at 1 a.m. Thursday when she stopped for lunch at McDonald's to check the tickets she had purchased Wednesday (Sept. 30).

Her numbers were 21-39-40-55-59. The Powerball number was 17.

The happy winner spoke at a news conference in Lansing and announced she planned to take a lump sum worth $197 million before taxes.

Julie Leach said she has quit her 'nasty' dirty job' at a Michigan fiberglass factory and now plans to build homes for herself, her partner and their three children.  

She purchased the winning ticket at 6:30 p.m. at the Three Rivers West Shell station in the southwestern Michigan community.

Leach says she'll take care of her three kids and 11 grandchildren with the jackpot. One of her grandchildren who attended the news conference said she wants a "big Barbie house" and an iPhone 6.

"I kept trying to focus my eyes on the numbers and dates," Julie Leach said. "You just don't ever think it's going to happen."

Leach said she hired a financial planner to help manage the large windfall.

"I haven't even thought about how we're doing anything," she said. "My main focus was getting somebody to help me so I can make the right decisions."

Julie talks about her win and how she quit her job. VIDEO

Vaughn Avery, Leach's partner of 36 years, said he was sleeping when Leach realized she won the Powerball.

"I said, 'You're kidding me, get out of here,' " Avery said. "I thought I was dreaming. She goes: 'No, we won it.' I had to look at it. I looked on her phone, grabbed my phone, pulled the website up. I just couldn't believe it. I said, 'I really need to go back to bed to get up for work.' She said, 'You don't ever have to go to work.' "

Avery said he and Leach plan to travel a bit and enjoy life.

"Just being financially set, my kids taken care of, being able to travel and being able to do what we want to do — that's really all we want," Avery said.

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