SLIPPERY ROCK — A woman is accused of driving drunk twice in the same day — eight-and-a-half hours apart.

Elisa C. Watson, 21, of Slippery Rock is due in court next month to face hearings in the separate cases of driving under the influence on May 3.

Slippery Rock police said they came upon Watson around 2:25 a.m. driving a GMC Terrain on Elm Street. While following the vehicle, officer Derek Dickey heard the sound of metal studs hitting the road.

He pulled over the defendant, and found that she was driving with studded tires out of season.

Watson admitted that she had downed four drinks about “an hour ago,” according to Dickey's affidavit.

She also acknowledged that there was vodka and orange juice in a water bottle with a flip-up straw, police said, that the officer noticed in the center console. An alleged bad showing during field sobriety testing landed her a trip to the Slippery Rock University police station for a breath test. The test indicated her blood-alcohol level was 0.235 percent, documents said, nearly three times the state's 0.08 percent legal limit.

She is charged with DUI, driving with an open container of alcohol, and the studded tire violation.

Watson was processed at the SRU station and allowed to call a friend for a ride home. University police let her borrow a charger for her cell phone to make the call, authorities said.

Apparently, she took the phone charger with her, but around 10:40 a.m. drove back to the SRU police station to return it, according to charging documents. She drove there in a Toyota Highlander.

She appeared intoxicated and smelled of alcohol, police Specialist Tyler Gray said in his affidavit. She allegedly admitted that she was drinking “last night.”

The defendant was again asked to give a breath sample. This time, police said, her blood-alcohol reading was 0.140 percent. SRU police charged her with another DUI.

Just before noon, she was again released to a friend.

Preliminary hearings for Watson in both cases are scheduled for June 12 at the office of District Judge Bill O'Donnell in Slippery Rock.

Online court records did not indicate if she has an attorney, and she could not be reached for comment.

An SRU spokesman said Watson graduated from the university earlier this spring.