Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇨🇦 C-GZWS - Boeing 737NG 8CT/W - WestJet WJA2137/WS2137, Licenciado Gustavo Diaz Ordaz (PVR) to Toronto Pearson (YYZ) - 4.5 mi away @ 34925 ft, heading NE at 566 mph. Spotted for first time! [06:42:53 PM CST] #C088FB #C_GZWS #B738 #WESTJET #WJA2137 #WS2137 #ADSB #ADSBbot