EESA09H3 Lecture 5: lecture 5 note
23 Nov 2016
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It is a convective storm (associated with surface heating) Four categories of thunderstorm: ordinary, often develop within large air masses (midlatitude cyclone, not necessarily near a frontal system, can form with little vertical wind shear(gradient/change of horizontal wind speed with height) Similar to ordinary except moderate wind shear (meaning storm tilts) Downdraft not going to cut the updraft that easily so last longer. Gust front of one storm initiates or induces another storm: supercell thunderstorm. Form with strong vertical wind shear (air masses involved) Upper level winds (cp air) from north/northwest. Along cold front of a midlatitude cyclone. Gust front forming along the cold front of midlatitude cycle. Associated with (ct & mp) air causing more rain because it has all the energy form the midlatitude cyclone system. The anvil extend of the cloud can course tornado. Little downburst of wind within a supercell thunderstorm (eg, shower head)
