1. Sky and SpaceSky and Space
Severe WeatherSevere Weather

2. Thunderstorm frequencyThunderstorm frequency

4. LightningLightningphotos: noaaphotos: noaa

5. Thunderstorms near SaoThunderstorms near Sao
Paulo, BrazilPaulo, BrazilPhoto:chabotspace.orgPhoto:chabotspace.org

6. Photo:Photo: blackhillsweather.comblackhillsweather.com

7. Multi-cellMulti-cell
 Photo: NSSLPhoto: NSSL

8. SupercellSupercellphoto: NSSLphoto: NSSL

9. MesocycloneMesocyclone
 2-6 miles across2-6 miles across

10. TornadoesTornadoes

11. TornadoesTornadoesteacher.scholastic.comteacher.scholastic.com

12. Photos: noaa, weathernotebook.orgPhotos: noaa, weathernotebook.org

13. WaterspoutsWaterspouts

14. Mechanicville, NYMechanicville, NY

15. MechanicvilleMechanicville

16. March 12, 2006 - KansasMarch 12, 2006 - Kansas

18. When?When?Photo: nsslPhoto: nssl

19. Tornado frequencyTornado frequency

20. Steps in Formation ofSteps in Formation of
TornadoTornado (nssl:noaa)(nssl:noaa)

24. Fujita ScaleFujita Scaletornadoproject.comtornadoproject.com

26. HurricanesHurricanes

28. NorthernNorthern
vs.vs.
SouthernSouthern
HemisphereHemisphere

30. Hurricane TrackingHurricane Tracking

33. 1 > 74 mph1 > 74 mph
5 > 155 mph5 > 155 mph