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

🇺🇸 N8949Q - BOEING 737 MAX 8 - SOUTHWEST AIRLINES CO SWA3517/WN3517, San Diego (SAN) to Baltimore/Washington Thurgood Marshall (BWI) - 4.7 mi away @ 37275 ft, heading ENE at 618 mph. Spotted 33x before. [12:03:36 PM CDT] #AC57D2 #N8949Q #B38M #SWA3517 #WN3517 #ADSB #ADSBbot