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on instruments. At this time a special United States Weather Bureau observation taken at St. Louis at 3:55 a.m. was transmitted to the flight by the TWA radio operator on duty at St. Louis and an acknowledgment was received from First Officer DioGuardi. The weather as broadcast was as follows: "Special — sky overcast, lower broken, ceiling 500 feet, variable, visibility one and one-half miles, light drizzle, light fog, 1023.7 millibars, temperature 32 degrees, dew point 31, wind NNE 5 m.p.h., barometer 30.20, scattered clouds at 200 feet." Immediately afterwards the St. Louis TWA altimeter setting of 30.20 was given to the flight and was acknowledged by DioGuardi. Upon receipt of this information, he advised Captain Scott accordingly and they set the barometric scales on both of the altimeters to read 30.20.
After passing over the range station on the initial approach Captain Scott executed a standard instrument let-down-through procedure. The final approach to the airport was in a westerly direction with the intention of landing on the east-west No. 1 runway. At 4:10 a.m. while Captain Scott was making his final approach and was still on instruments, the Civil Aeronautics Communications operator on duty at St. Louis broadcast over the simultaneous St. Louis radio range a 4:09 a.m. special weather report as reported by the United States Weather Bureau at that station. This report indicated a ceiling
