Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Warm- Up 1. What are the 4 types of fronts? 2. Which type of air mass moves faster? 3. Which direction do the westerlies move across the U.S.? 4. Is energy released or absorbed during condensation? TOC: 177. Severe Weather 178. Hurricane WS 179. Hurricane Story Keywords: • Cyclone • Thunderstorms • Tornadoes • Hurricanes Mid- Latitude Cyclone • Most weather in US comes from low pressure systems • Air moves counterclockwise and into center • Most have cold front and warm front from the center Cyclone formation • Front develops first • Front resembles a wave • Warm air moves toward poles • Cold air moves toward equator • Cold fronts move faster • Occlusion forms and storm strengthens Airflow Aloft • Air in upper atmosphere helps form air circulation • Movement of air above helps maintain low pressure • Systems usually last about a week Thunderstorms • Storm with winds, thunder, and lightning • Usually caused by vertical movement of warm air • Generates cumulonimbus clouds Thunderstorms • 2000 at any given time on Earth • 45,000 per day • 16 million annually • 100,000 per year in the US Thunderstorms • Warm humid air rises in unstable environment • Cumulus stage updrafts begin • Precipitation begins during mature stage • Storm lightens during dissipation stage Tornadoes • Violent windstorm with rotating column of air • Vortex extends down from cumulonimbus cloud • 770 per year in US Tornadoes • Most from severe thunderstorms • Mesocyclone must develop • Mesocyclone is vertically moving, rotating air • 50% of mesocyclones generate tornadoes Tornadoes • Center of tornadoes is very low pressure • Strength based on wind speed • Labeled as F0- F5 with F0 as weakest Hurricanes • Whirling tropical cyclones with high wind speeds • Generate huge waves at sea and large storm surges on the coast • Pose great flood risks Hurricanes • Classified as hurricane at 119km wind speed • Need heat and moisture to form • Energy comes from rapid water condensation Hurricanes • Category 1- 5 with 1 the lowest • Warm moist air rushes in on surface • Air turns up at eye • Eye is also warm Assignment • Complete the hurricane worksheet • Then use the blank map to write a story about a hurricane forming and moving onto the US • Include a chart with coordinates that are plotted on the map • Also include details about the hurricanes development