The first 2012 Saint Louis snowfall and its radioactive; thanks Fukushima.
By the time the snow was measured, the majority of it had been on the ground since the previous evening. The snow continued lightly for most of the day today, and ended around 3-4pm. The readings were taken at approximately 6:30pm this evening.
Typically it is difficult to measure the radioactivity of snow because its water content tends to attenuate the measurements;. However, one interesting effect we have noticed is that during active snowfalls indoor atmospheric radioactive readings tend to elevate above 2x background radiation.