The tornado was classified as a land spout tornado, which is a brief spin-up of rising air during the early stages of a developing thundershower. Land spout tornadoes are usually small, brief and ...

A mesocyclone doesn't always produce a tornado ... The team then had to balance those tornado samples with difficult non-tornado samples. If the dataset were too easy, say by comparing tornadoes ...

FARGO — A tornado touched down ... brief and relatively non-violent because they are not associated with the powerful updraft of the mesocyclone of a well-developed, severe thunderstorm.