Unit 2: Hurricane Formation
Summary
Learning Goals
- Explain basic characteristics of tropical storms.
- Apply an uncertainty forecast cone to make recommendations for a ship in the potential path of a hurricane at sea.
This unit is related to:
- The ocean is a major influence on weather and climate (Ocean Literacy Principle 3).
- The oceans and humans are inextricably linked (Ocean Literacy Principle 6).
- Earth scientists use repeatable observations and testable ideas to understand and explain our planet (Earth Science Literacy Big Idea 1).
- Natural hazards pose risks to humans (Earth Science Literacy Big Idea 8).
Context for Use
Description and Teaching Materials
Present slides (PowerPoint 2007 (.pptx) 7.3MB Sep25 14) on hurricane characteristics. (25 min)
Hand out Student Activity Sheet. (Microsoft Word 2007 (.docx) 742kB Aug25 14) as an in-class activity or homework. (15 min)
Explain the scenario: It is Friday morning and your container ship in Miami is planning to sail for Galveston, Texas. It is normally a three-day trip, but a hurricane is predicted to be near Miami by Sunday night. What do you do? Explain the relative risks of staying in port or heading to Galveston on schedule.
Students read background on the sheet and work in pairs or alone for 5–7 minutes.
Summarize: forecasters use evidence from past hurricane tracks and produce a hurricane forecast cone to help governments, businesses, and individuals make decisions. A five-day forecast cone will not be as accurate as a three-day forecast cone, but both are based on data. There is uncertainty in making these difficult (and costly) decisions, but as the hurricane approaches, uncertainty decreases.
Assessment
Learning Goal 1: Explain basic characteristics of tropical storms.
- Quiz question: What four conditions are necessary for hurricane formation?
Learning Goal 2: Apply an uncertainty forecast cone to make recommendations for a ship in the potential path of a hurricane at sea.
- The Student Activity Sheet (Microsoft Word 2007 (.docx) 742kB Aug25 14) can be used as an in-class activity (15 min) or homework. Explain the scenario: It is Friday morning and your container ship in Miami is planning to sail for Galveston, Texas. It is normally a three-day trip, but a hurricane is predicted to be near Miami by Sunday night. What do you do? Explain the relative risks of staying in port or heading to Galveston on schedule.
Answer Key to Unit Assessment Questions
- See the for an example of a correct student response to the two assessments above.
References and Resources
Review the conditions needed for hurricane formation with the Create-a-Cane game . Make sure you follow all the steps until you create a Category 5 Hurricane.
A more in-depth description of hurricane formation can be found at NASA: http://earthobservatory.nasa.gov/Features/Hurricanes/ or NOAA: https://www.weather.gov/jetstream/tc.
Slate.com article about widespread misconceptions about forecast cones: "In Hurricane Forecasts, 'Cone of Uncertainty' Is Surrounded by Haze of Confusion"
Additional information about NOAA's forecast cones: http://www.nhc.noaa.gov/aboutcone.shtml
More about uncertainty forecast cones: http://www.aoml.noaa.gov/hrd/Powell/accuracy.pdf
SERC collection of hurricane visualizations
Daily updates of Hurricane Irene August 22-30, 2011 from NASA