1. Turn in HW .
2. Discussion & interaction on topics from last week (bring your clicker).
3. Keynote slides & discussion of tornadoes & lightning.
4. Videos of tornadoes.
5. Videos of lightning :  YouTube Day1-01 thru Day1-22, and
6. Videos of hail:  Day4-25 thru Day4-35.
   

Topic: Tornadoes
   Textbook section 15.4.
Learning Goals
At the end of this section, you should be able to:

1. Visually recognize and identify tornadoes and associated wall clouds.
   
2. Visually determine the life-cycle stage of a tornado and anticipate its subsequent evolution.
   
3. Classify the different types of tornadoes.
   
4. Propose how to safely chase and photograph tornadoes.
   
5. Classify tornado strength using the Enhanced-Fujita scale.

Topic: Lightning & Thunder - Part 1
   Textbook section 15.3 (but skip 15.3.1 & 15.3.6.1). .
Learning Goals
At the end of this section, you should be able to:

1. Contrast theories for how thunderstorms  become electrified.
   
2. Describe the evolution of a lightning stroke.
   
3. List the different types of lightning, and judge which are most hazardous.
   
4. Explain how lightning creates thunder.
   
5. Criticize the hypothesis that you can't hear thunder beyond a certain distance.

Topic: Lightning & Thunder - Part 2.
.
Learning Goals
At the end of this section, you should be able to:

1. Summarize key aspects of the distribution of lightning around the world.
   
2. Relate lightning hazards to lightning characteristics.
   
3. Recommend actions you can take to make yourself safe near a thunderstorm.
   

• S.Ch3. Sections 3.0 - 3.4., but not any "HIGHER MATH" boxes

1. Contrast the nature of different types of lapse rate.
2. Contrast adiabatic vs. diabatic processes.
   
3. Forecast the temperature change of an adiabatically rising or sinking air parcel.
   
4. Plot dry adiabats on a thermo diagram, and demonstrate how to use a thermo diagram to easily forecast temperature change of rising or sinking air parcels without doing calculations.
   
5. Interpret the meaning of the potential temperature and virtual potential temperature, calculate them, and relate them to plotted adiabats.
   

1. Turn in HW by today, if Monday was a holiday.
2. Discussion & interaction on topics from readings (bring your clicker).
3. Demo using thermo diagram.

Readings for the Friday class:

• S.Ch3. Sections 3.5 - 3.6.

1. Distinguish between the Eulerian and Lagrangian heat budgets, and to recommend when to use each type.
   
2. Explain what each term in the Eulerian heat budget represents physically.
   
3. Forecast air temperature if you know the values of the Eulerian heat-budget terms.
   
4. Describe the terms in the surface heat budget, and explain how that budget relates to the surface radiation budget. 

1. Discussion & interaction on topics from readings (bring your clicker).

1. Apply topics covered earlier this week to compute number answers & infer their significance.