Snowstorms passed through the area this afternoon and I wondered they appeared in thermal infrared. You can see in the images below that a snowstorm several miles away does not appear in thermal infrared. Therefore, I conclude that the air beneath a cloud is at the same temperature as falling snow. In actuallity, graupel or soft hail fell shortly after these images were taken. So it is probably more graupel rather than snow in these images.
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| Visible image of a snowstorm several miles away |
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| The same storm at nearly the same time. The falling snow is indistinguishable from the air below the clouds. |
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