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

🇺🇸 N37367 - Boeing 737MAX 8 - United Airlines UAL1545/UA1545, Cleveland-Hopkins (CLE) to George Bush Intcntl/Houston (IAH) - 4.5 mi away @ 37025 ft, heading SSW at 509 mph. Spotted for first time! [03:06:45 PM CDT] #A4423A #N37367 #B38M #UNITED #UAL1545 #UA1545 #ADSB #ADSBbot