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Rules of precipitation • Rain will occur on the cold front. • Rain will occur in front of the warm front Happy high cool and dry. Safety • • • • • Have a plan Water Emergency kit First aid kit Flash light • Weather Forecasting • Major Storms – Thunderstorms • Conditions – Uplift of air – Cumulonimbus clouds http://www.youtube.com/watch?v=kuY4c dwqo_Q&feature=related • Stages – Cumulus » Air is lifted and cools adiabatically to the dew point and a cumulus cloud develops. » Heat of vaporization is released and accelerates the uplift. – Mature » When the moisture that is produced reaches the surface of the Earth » This series of updrafts, downdrafts, and precipitation release electrical charges which become the lightening associated with the storm – Final » All of the updrafts are cut off and only downdrafts exist. • Lightening • Thunder • hail • These hailstones fell from a thunderstorm in Iowa, damaging automobiles, structures, and crops. You Tube Hail storm – Tornados • Most violent, focused storm on Earth • Speeds in excess of 300 km/hr (200 mi/hr) – Hurricanes • A hurricane is a violent storm that is produced over the warm tropical ocean near the equator. • Tropical Cyclone • Fueled by warm water • This is a satellite photo of hurricane John, showing the eye and counterclockwise motion. • Cross section of a hurricane. Defined as a violently rotating column of air extending from a thunderstorm to the ground. • Occur in many parts of the world • Found most frequently in the United States east of the Rocky Mountains • Most frequent during the spring and summer months. •Capable of tremendous destruction with wind speeds of 250 mph or more. • Damage paths can be in excess of one mile wide and 50 miles long. Tornado Formation Tornado Formation cont.d... The End