The finish ties for the second-best in school history.
The Cougar crews will now race at 8 a.m., 8:36 a.m. and 8:48 a.m.
The Cougars' varsity eight and varsity four advanced to the Petite Final.
Washington State's second varsity eight won its heat in the morning session to advance.
The senior has rowed with the varsity team all four years.
Three Cougars are receiving the honor for their second time.
The ninth-ranked Cougars compete at NCAA Championships this week.
Action begins Friday and runs through Sunday.
The No. 7 Cougars earned an at-large bid.
WSU notched its best team finish since 2008.
The championships take place Sunday, May 17 at Lake Natoma.
WSU rowers will participate in the Stamp Out Hunger Food Drive.