1. Cloud Development

2. Clouds are made of water droplet or ice crystals or both
How do water droplets/ice crystal form and grow?
How do various types of clouds form?
How can clouds lead to precipitation?

6. Step 1:
Condensation
And
Freezing
Nuclei

7. Salt particles attract water….they produce hygroscopic nuclei

8. Step 2; Rising Motion Producing Cooling and Saturation

9. The Warm Rain Process

12. Cold Cloud Process

14. Supercooled Water

17. Freezing Rain

19. Freezing Rain in the NW: The Passes and The Columbia Gorge

20. Freezing Rain in the Gorge

21. Sleet

24. Cloud Seeding

31. Contrails:

45. Contrails and Climate: Net Warming