1. Severe Weather Foldable

2. Design

3. Thunderstorms Form from warm temperatures, moisture, and rising air
Three-stage life cycle
1. Cumulus Stage – dominated by cloud formation and updrafts
2. Mature Stage – heavy winds, rain, and lightning
3. Dissipation Stage – updrafts stop, winds die down, lightning ceases, and precipitation weakens

6. Tornadoes A violent, whirling column of air in contact with the ground
Formation – thunderstorm updrafts begin to rotate
Classification – Fujita Scale – F0 to F5

9. Hurricanes An intense tropical storm with winds exceeding 119 km/hr
Formation
1. Warm moist air rises, Water vapor condenses, Clouds form
2. As air continues to rise, a tropical depression forms – 37 to 62 km/hr
3. Air continues to rise, Storm builds, Tropical storm forms – 62 to 119 km/hr
4. When winds exceed 119 km/hr, the storm becomes a hurricane

12. Blizzard
A violent winter storm characterized by freezing temperatures, strong winds, and blowing snow
Usually form when an air mass of cold, dry, Canadian air moves south and interacts with a warm, moist air mass moving north from the Gulf of Mexico