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

🇺🇸 N428WN - Boeing 737NG 7H4/W - Southwest Airlines SWA2498/WN2498, Baltimore/Washington Thurgood Marshall (BWI) to Phoenix Sky Harbor (PHX) - 4.1 mi away @ 35175 ft, heading W at 428 mph. Spotted 54x before! [09:37:17 AM CST] #A51B58 #N428WN #B737 #SOUTHWEST #SWA2498 #WN2498 #ADSB #ADSBbot