GEOG 272 Lecture Notes - Lecture 15: Funnel Cloud, Mesocyclone, Supercell
20 Nov 2017
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Lecture 15: tornados occur in all season. But most frequent in spring and summer: cold polar air masses expand equatorward. Cold polar air and warm tropical air juxtaposition: a(cid:374)d also duri(cid:374)g the day, they"ll (cid:271)e (cid:373)ost likely to o(cid:272)(cid:272)ur later i(cid:374) the after(cid:374)oo(cid:374), early e(cid:448)e(cid:374)i(cid:374)g. When u have intense heating during the day: most frequent in u. s. in valley of mississipi river, u got cold air and warm air. Saturation specific humidity of air decreases as temperature decreases: cumulonimbus clouds in which air is rapidly cooling. Water droplets in the air: canada ranks second in frequency of tornadoes. Primarily in prairies, southern ontario and southern quebec: outside of north america, between 30 and 50 degrees latitude. Parts of south america: supercell tornadoes, and those that are not associated with supercell tornadoes, so the tornadoes associated with supercells are the most common. Often the most intense and most destructive: the super(cid:272)ell is the a(cid:272)tual stor(cid:373).
