1. Weather and Climate Events Frequency, duration and impact

2. North Atlantic Depressions (Mid-latitude weather systems) More frequentlyDailyWeeklyMonthlyYearly 1/ decade decade 1/ hundred years 1/ thousand years 1/ 100, 000 years Less frequently Frequency

3. North Atlantic Depressions (Mid-latitude weather systems) Duration LessMinutesHoursDaysWeeksMonthsYearsDecades 100 years 1000 years longer

4. North Atlantic Depressions (Mid-latitude weather systems) Impact No damage Minor damage to small plants and objects A few properties/ trees suffer heavy damage Extensive damage to houses and ecosystems local devastation National scale devastation Planetary scale devastation

5. UK Tornadoes More frequentlyDailyWeeklyMonthlyYearly 1/ decade decade 1/ hundred years 1/ thousand years 1/ 100, 000 years Less frequently Frequency

6. UK Tornadoes Duration LessMinutesHoursDaysWeeksMonthsYearsDecades 100 years 1000 years longer

7. UK Tornadoes Impact No damage Minor damage to small plants and objects A few properties/ trees suffer heavy damage Extensive damage to houses and ecosystems local devastation National scale devastation Planetary scale devastation

8. UK Thunderstorm More frequentlyDailyWeeklyMonthlyYearly 1/ decade decade 1/ hundred years 1/ thousand years 1/ 100, 000 years Less frequently Frequency

9. UK Thunderstorm Duration LessMinutesHoursDaysWeeksMonthsYearsDecades 100 years 1000 years longer

10. UK Thunderstorm Impact No damage Minor damage to small plants and objects A few properties/ trees suffer heavy damage Extensive damage to houses and ecosystems local devastation National scale devastation Planetary scale devastation

11. North Atlantic Hurricanes More frequentlyDailyWeeklyMonthlyYearly 1/ decade decade 1/ hundred years 1/ thousand years 1/ 100, 000 years Less frequently Frequency

12. North Atlantic Hurricanes Duration LessMinutesHoursDaysWeeksMonthsYearsDecades 100 years 1000 years longer

13. North Atlantic Hurricanes Impact No damage Minor damage to small plants and objects A few properties/ trees suffer heavy damage Extensive damage to houses and ecosystems local devastation National scale devastation Planetary scale devastation

14. Tornadoes in the USA More frequentlyDailyWeeklyMonthlyYearly 1/ decade decade 1/ hundred years 1/ thousand years 1/ 100, 000 years Less frequently Frequency

15. Tornadoes in the USA Duration LessMinutesHoursDaysWeeksMonthsYearsDecades 100 years 1000 years longer

16. Tornadoes in the USA Impact No damage Minor damage to small plants and objects A few properties/ trees suffer heavy damage Extensive damage to houses and ecosystems local devastation National scale devastation Planetary scale devastation

17. Indian Summer Monsoon More frequentlyDailyWeeklyMonthlyYearly 1/ decade decade 1/ hundred years 1/ thousand years 1/ 100, 000 years Less frequently Frequency

18. Indian Summer Monsoon Duration LessMinutesHoursDaysWeeksMonthsYearsDecades 100 years 1000 years longer

19. Indian Summer Monsoon Impact No damage Minor damage to small plants and objects A few properties/ trees suffer heavy damage Extensive damage to houses and ecosystems local devastation National scale devastation Planetary scale devastation

20. Volcanic Eruption (effect on weather) More frequentlyDailyWeeklyMonthlyYearly 1/ decade decade 1/ hundred years 1/ thousand years 1/ 100, 000 years Less frequently Frequency

21. Volcanic Eruption (effect on weather) Duration LessMinutesHoursDaysWeeksMonthsYearsDecades 100 years 1000 years longer

22. Volcanic Eruption (effect on weather) Impact No damage Minor damage to small plants and objects A few properties/ trees suffer heavy damage Extensive damage to houses and ecosystems local devastation National scale devastation Planetary scale devastation

23. Supervolcano (effect on weather) More frequentlyDailyWeeklyMonthlyYearly 1/ decade decade 1/ hundred years 1/ thousand years 1/ 100, 000 years Less frequently Frequency

24. Supervolcano (effect on weather) Duration LessMinutesHoursDaysWeeksMonthsYearsDecades 100 years 1000 years longer

25. Supervolcano Impact of the changes to the weather/ climate No damage Minor damage to small plants and objects A few properties/ trees suffer heavy damage Extensive damage to houses and ecosystems local devastation National scale devastation Planetary scale devastation

26. Solar Cycle (effect on weather) More frequentlyDailyWeeklyMonthlyYearly 1/ decade decade 1/ hundred years 1/ thousand years 1/ 100, 000 years Less frequently Frequency

27. Solar Cycle (effect on climate) Duration LessMinutesHoursDaysWeeksMonthsYearsDecades 100 years 1000 years longer

28. Solar Cycle (effect on climate) Impact No damage Minor damage to small plants and objects A few properties/ trees suffer heavy damage Extensive damage to houses and ecosystems local devastation National scale devastation Planetary scale devastation

29. Ice Age More frequentlyDailyWeeklyMonthlyYearly 1/ decade decade 1/ hundred years 1/ thousand years 1/ 100, 000 years Less frequently Frequency

30. Ice Age Duration LessMinutesHoursDaysWeeksMonthsYearsDecades 100 years 1000 years longer

31. Ice Age Impact No damage Minor damage to small plants and objects A few properties/ trees suffer heavy damage Extensive damage to houses and ecosystems local devastation National scale devastation Planetary scale devastation

32. El Niño More frequentlyDailyWeeklyMonthlyYearly 1/ decade decade 1/ hundred years 1/ thousand years 1/ 100, 000 years Less frequently Frequency

33. Duration LessMinutesHoursDaysWeeksMonthsYearsDecades 100 years 1000 years longer El Niño

34. Impact No damage Minor damage to small plants and objects A few properties/ trees suffer heavy damage Extensive damage to houses and ecosystems local devastation National scale devastation Planetary scale devastation El Niño