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

🇺🇸 N8583Z - Boeing 737NG 800/W - Southwest Airlines SWA2732/WN2732, Baltimore/Washington Thurgood Marshall (BWI) to Phoenix Sky Harbor (PHX) - 4.5 mi away @ 35675 ft, heading W at 474 mph. Spotted 48x before! [10:15:16 PM CDT] #ABC7E9 #N8583Z #B738 #SOUTHWEST #SWA2732 #WN2732 #ADSB #ADSBbot