1. By: Klaus Austin Fuentes Jan Michael G. Gaite

2. WEATHER DISTURBANCE  a general term that describes any pulse of energy moving through the atmosphere.  they can act as focusing mechanisms for storm formation, or even to intensify low pressure systems

3. TYPES OF WEATHER DISTURBANCES  Typhoon/Hurricane  Tropical Cyclones  Tornado

4. Typhoon/Hurricane - A large heat engine, where great amounts of heat are being produced from the process of latent heat of condensation. - occurs as water vapor is being evaporated from the ocean surface and condensed into cloud droplets.

5. Causes of typhoon/hurricane:  Pre-existing disturbance  Warm ocean water  Low atmospheric stability  Sufficient Coriolis force  Low vertical wind shear  Upper atmosphere divergence * Coriolis force - an apparent force that as a result of the earth’s rotation deflects moving objects to the right in the northern hemisphere and to the left in the southern hemisphere.

6. Tropical Cyclones - a storm system characterized by a low- pressure center and numerous thundersto rms that produce strong winds and heavy rain.

7. Causes of tropical cyclones:  Water temperatures of at least 26.5 °C (79.7 °F)  Rapid cooling with height  High humidity  Low amounts of wind shear  A need to form more than 555 km (345 mi) or 5 degrees of latitude away from the equator  pre-existing system of disturbed weather

8. Tornado - rotating columns of air usually produced by severe thunderstorms.

9. Multi vortex tornadoes – mini tornadoes circulating around a larger one. WATERSPOUT - tornadoes form over water. LANDSPOUT - tornadoes form over land.

10. How tornadoes are formed? - most tornadoes actually form from the ground up. It is simply highly saturated air dropping from the thunderstorm which gives the appearance of a tornado “touching down”.

11. How fast do tornadoes move? - a tornado on average moves at speeds of 30mph, but can range stationary to about 70mph.