Katherine Thayer received a sweet surprise this Valentine’s Day.It wasn’t roses or chocolates or stuffed teddy bears.It was the birth of baby Noah. One week early. On the side of Interstate 205.“It gets funnier and funnier every time we tell it,” said Alina Palmer, Katherine’s midwife.Katherine awoke to contractions at 3:30 a.m. on Valentine’s Day. Her husband, Jeff, helped keep Katherine calm as she worked through the contractions for the next few hours. Since she wasn’t showing any other signs of labor, they didn’t head to the hospital.At about 8:30 a.m., the contractions got more frequent but were still eight to 10 minutes apart. After 30 minutes of contractions, Palmer suggested the couple head to the hospital for an evaluation.So the Gresham, Ore., couple loaded their daughter and nephew, both 2 years old, into the backseat of their 2006 Toyota Corolla and headed to PeaceHealth Southwest Medical Center, where Jeff works as an imaging assistant.By the time they reached the Troutdale exit on Interstate 84, Katherine’s water broke.A few miles later, Katherine told her husband she couldn’t wait any longer.“She said she feels like she has to push,” Jeff said. “Panic sets in.”Throughout the morning, Jeff was on his cellphone updating Palmer, who was headed to the hospital from her home in Clackamas, and his mother, Judy Thayer, who was en route from the St. Johns neighborhood.When Katherine started pushing, Palmer told Jeff it was time to pull the car over to the side of the road. The couple met their midwife and Judy alongside I-205, near the Sandy Boulevard exit.