Le Mars (6-2, 4-1 Class 3A District 2) took the lead in the first quarter on a pair of touchdown passes from quarterback Levi Te Brink to Gabe Rahn.
Te Brink found Rahn for the first score on a 28-yard pass play. The second touchdown was a 24-yard pass play. Le Mars led 14-0 with two extra point kicks by Conner Delfs.
The Bulldogs extended the lead in the second quarter on a 3-yard touchdown run by Travis Kinney. Le Mars led 20-0 over Storm Lake (3-5, 2-4) at halftime.
Kinney tallied again in the third quarter on a 1-yard touchdown run. Te Brink ran in for a 2-yard touchdown later in the quarter. Le Mars led 33-0 after a PAT by Delfs.
Juan Hernandez scored the Bulldogs' final points of the game on a 3-yard touchdown run in the fourth quarter.
The Tornadoes took some consolation points late in the contest on a 4-yard touchdown run by Chase Lange. Jorge Sanchez set the final score with a PAT.
Le Mars was 7-for-12 on third downs and 3-for-3 on fourth downs while holding Storm Lake to 4-for-10 on third down and 0-for-3 on fourth down.
The Tornadoes lost two fumbles and one interception, while Le Mars lost just one interception. The Bulldogs gained 317 yards of total offense, but committed 10 penalties for 92 yards.
Te Brink finished 7-for-11 passing for 128 yards, two touchdowns and no interceptions. Rahn threw the team's only interception.
Te Brink was the Bulldogs' leading rusher with 61 yards on nine rushing attempts. Kinney ran for 29 yards on 11 carries.
Reid Gearke ran for 40 yards on six carries. Hernandez scored once and gained 25 yards on four rushing attempts.
Rahn caught five passes against Storm Lake for two touchdowns and 101 yards. Rahn returned two punts for 32 and 28 yards. Brennan Buss and Matt Strub each caught one pass for 15 and 12 yards, respectively.
Rahn made five solo tackles and assisted on another. Daniel Ahlers and Chris Hiserote each made four solo tackles and seven total tackles. Joey Husk caught the defense's only interception.
Le Mars' final game of the regular season will be at Carroll (3-5, 3-2) on Friday. Carroll lost just 17-14 to No. 2 Bishop Heelan Catholic (8-0, 4-0), the Crusaders' closest game of the season, in Week 7 in Carroll.