John Farley
Supporter
This is from the NWS damage survey for the tornado:
"From there the tornado paralleled Interstate 70 through the community of St. Ann, then took aim directly on Lambert St. Louis International Airport. Many of the large windows in the main terminal building were blown out or damaged by flying debris and a large section of roof was peeled from Concourse C. Although the vast majority of people were evacuated to lower levels and to interior rooms before the tornado hit, 5 people were treated and released from area hospitals for injuries due to flying debris. The airport was closed due to the extensive damage.
The tornado exited Lambert St. Louis International Airport crossing near the McDonnell Boulevard/Harmon Lane intersection."
Note that it says "vast majority", not everyone. But as others have noted, in the video showing the debris being blown through Concourse C, the most badly damaged area, there were very few people still there when the tornado hit. Apparently, though, there was some unevenness in the evacuation process, per local news accounts, and there probably were some parts of the airport where people were not evacuated. And of course, also as others have noted, it is possible that not everyone evacuated as instructed.
Regarding the aircraft - as Mike Smith has noted in another thread, there does seem to have been a problem there, as the FAA apparently does not share tornado warnings with pilots or other airport/airline personnel, which does seem to explain why some flight operations were ongoing at least very close to the time when the tornado hit.
"From there the tornado paralleled Interstate 70 through the community of St. Ann, then took aim directly on Lambert St. Louis International Airport. Many of the large windows in the main terminal building were blown out or damaged by flying debris and a large section of roof was peeled from Concourse C. Although the vast majority of people were evacuated to lower levels and to interior rooms before the tornado hit, 5 people were treated and released from area hospitals for injuries due to flying debris. The airport was closed due to the extensive damage.
The tornado exited Lambert St. Louis International Airport crossing near the McDonnell Boulevard/Harmon Lane intersection."
Note that it says "vast majority", not everyone. But as others have noted, in the video showing the debris being blown through Concourse C, the most badly damaged area, there were very few people still there when the tornado hit. Apparently, though, there was some unevenness in the evacuation process, per local news accounts, and there probably were some parts of the airport where people were not evacuated. And of course, also as others have noted, it is possible that not everyone evacuated as instructed.
Regarding the aircraft - as Mike Smith has noted in another thread, there does seem to have been a problem there, as the FAA apparently does not share tornado warnings with pilots or other airport/airline personnel, which does seem to explain why some flight operations were ongoing at least very close to the time when the tornado hit.