Has a tornado ever formed in a snow storm?

UPDATE 11/8/2017: I would have thought such a thing was not possible, but this article from 'Ask Tom' from the Chicago Tribune says otherwise: > Dr. Harold Brooks, a tornado expert at the National Severe Storms Laboratory in Norman, Okla. read more

Dr. Harold Brooks, a tornado expert at the National Severe Storms Laboratory in Norman, Okla., says that though extremely rare, there are one or two reliable reports of tornadoes that occurred with temperatures near freezing, though not necessarily during a snowstorm. read more

In theory, a tornado can happen during a snowstorm, but it is not likely as they require warm and humid air colliding with a cold front. Tornadoes can and do, however, occur immediately following a snow storm or when snow is still on the ground. read more

A dark wedge of cloud reaching the ground. I saw it only for a millisecond, but the memory has lasted a lifetime. So, yes tornadoes can form at night and they are scary as hell. Update: We just had another night tornado.. 3 to be exact. This storm was double rare in that it hit at night and in August. read more