🇺🇸 N946AK - Boeing 737MAX 9 - Alaska Airlines ASA473/AS473, St Louis Lambert (STL) to Seattle-Tacoma (SEA) - 3.6 mi away @ 13100 ft, heading WNW at 394 mph. Spotted 9x before. [06:41:25 AM CDT] #AD237C #N946AK #B39M #ALASKA #ASA473 #AS473 #TakingOff #Departure #ADSB #ADSBbot