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

🇺🇸 N436WN - Boeing 737NG 7H4/W - Southwest Airlines SWA513/WN513 (LAS-DEN-RIC-BWI) - 6.0 mi away @ 40350 ft, heading E at 577 mph. Spotted 69x before! [02:00:14 PM CDT] #A53B69 #N436WN #B737 #SOUTHWEST #SWA513 #WN513 #ADSB #ADSBbot