I've used SNOTEL (40.67MHz) in the past, but moved away from it due to high Es in the summer time, and the fact that NAVSPASUR (216 MHz) gave me better signal with a much smaller antenna.
Now NAVSPASUR is long gone along with the analog TV stations and it may be time to revisit SNOTEL. For your location in Missouri, you can get signal from SNOTEL and SCAN, which is located in your neck of the woods; for SNOTEL you need to point to Utah/Idaho.
I used a MOXON antenna for SNOTEL,which is a folded two element Yagi, with good success. Google SNOTEL/SCAN for more info and see this website as well: http://www.roswellme...gi__snotel.html
SNOTEL meteor scatter is a funky staccato sound due to the PSK modulation scheme.