Schenn, who also had an assist, now has four career hat tricks, while Buchnevich, who had two short-handed goals, has three career hat tricks.
Torey Krug had a goal and an assist, Alexey Toropchenko also scored and Robert Thomas added four assists for the Blues.
Guhle also added an assist as the Habs scored two goals in a rapid-fire span in the third period.
Brad Marchand logged a goal and an assist to lead the Bruins, who had a two-game winning streak snapped.
Cole Perfetti and Brenden Dillon scored goals for the Jets, who saw their three-game winning streak come to an end.
Persons:
Louis, Robert Thomas, Ron Chenoy, Schenn, Pavel Buchnevich, Buchnevich, Torey Krug, Alexey Toropchenko, Jordan Binnington, Mikko Rantanen, Jack Johnson, Alexandar Georgiev, Ivan Prosvetov, Kaiden Guhle's, Nick Suzuki, Brendan Gallagher, Guhle, Sam Montembeault, Brad Marchand, Charlie McAvoy, Jeremy Swayman, Zach Hyman, Dylan Holloway, Stuart Skinner, Jaden Schwartz, Philipp Grubauer, Joey Daccord, Daniel Sprong, Lucas Raymond, Alex DeBrincat, Robby Fabbri, Jake Walman, Ville Husso, Columbus, Patrik Laine, Alexandre Texier, Adam Fantilli, Sean Kuraly, Spencer Martin, Wyatt Johnston, Thomas Harley, Matt Duchene, Scott Wedgewood, Cole Perfetti, Brenden Dillon, Connor Hellebuyck, Drake Batherson, Mathieu Joseph, Rourke Chartier, Travis Hamonic, Tim Stutzle, Joonas Korpisalo, Blake Coleman, Calgary's, Dustin Wolf, Jacob Markstrom, Pyotr Kochetkov, Sebastian Aho, Brent Burns, Kochetkov, Jonas Johansson, Noah Gregor, Matthew Knies, William Nylander, Nicholas Robertson, David Kampf, Tyler Bertuzzi, Max Domi, Bobby McMann, J.T . Miller, Pius Suter, Nic Dowd, Aliaksei, Alex Ovechkin, Wayne Gretzky, Ovechkin, Gretzky, Dowd, hadn't, Protas, Alexander Romanov, Erik Karlsson, Tristan Jarry, Ukko, Pekka Luukkonen, Michael Carcone, Sean Durzi, Troy Stecher, Alex Kerfoot, Clayton Keller, Connor Ingram, Filip Forsberg, Kiefer Sherwood, Dante Fabbro, Ryan O'Reilly, Morgan Frost, Cal Petersen, Owen Tippett, Cam Atkinson, Sean Walker, Adrian Kempe, Carl Grundstrom, Cam Talbot
Organizations:
Louis Blues, Colorado Avalanche, Ball, Blues, St, Avalanche, Canadiens, Bruins, Boston, NHL, Oilers, Seattle, San Jose, Wings, Blue Jackets, Detroit, Red Wings, Jets, Dallas, Winnipeg, Stars, Central Division, Senators, Flames, Ottawa, Calgary, AHL, Hurricanes, Tampa, Maple Leafs, Canucks, Toronto, Vancouver, Capitals, Islanders, New, Penguins, Sabres, Pittsburgh, Buffalo, Coyotes, Predators, Nashville, Flyers, Philadelphia, Anaheim, Los, Thomson
Locations:
Denver , Colorado, USA, Denver, Montreal, Edmonton, Columbus, Carolina, Tampa Bay, Washington, New York, Elmont, Arizona, Los Angeles, Southern California, Philadelphia