Geography

Concepts to cover

1. Conditions for tropical cyclones: warm sea over 27 degrees C, Coriolis, low wind shear, upper divergence, pre-existing low
2. Structure: eye, eye wall, spiral bands; warm core; landfall and decay
3. Regions and names: hurricane, typhoon, willy-willy, cyclone; basins without cyclones (South Atlantic, south-east Pacific)
4. Extra-tropical (temperate) cyclones: frontal origin, size, movement, contrast with tropical
5. Thunderstorms and tornadoes