1. Cloud
Types
18.3
Brain Pop:
Clouds

2. 18.3 Types of Clouds
Clouds are classified based on how they formed and their height
3 basic forms…

3. Cirrus: (= a curl of hair) Thin, white, wispy, feathery
Made from ice crystals at high altitudes
Seen in fair weather, but can mean
rain or snow is coming

4. Cumulus: (= a pile) Rounded, thick, puffy masses
Formed by vertically rising air currents
Usually mean fair weather

5. Layered, gray, and smooth
Stratus: (= a layer)
Layered, gray, and smooth
Form in sheets at low altitudes
Block out sunlight - associated with rain

6. 3 levels of height  can have seasonal and latitudinal variation

7. Cirrostratus halo around the sun
Cirrus
cirrocumulus
High Clouds: (above 6000 meters)
Cirrostratus halo around the sun
cirrostratus

8. altocumulus
Middle Clouds: ( meters)
altostratus

9. Low Clouds: (below 2000 meters)
Stratus
stratocumulus
Low Clouds: (below 2000 meters)
nimbostratus

10. Clouds of vertical development: (start at 2000 meters – mid/high)
cumulonimbus
Clouds of vertical development:
(start at 2000 meters – mid/high)

11. Fog: A cloud with its base at or very near the ground
The only difference between clouds and fog is their method and place of formation.

12. Fogs caused by cooling Ex: coastal California
Fog forms when warm oceanic air moves over a cold water current, then wind blows it over land
Ex: coastal California

13. OR fog forms over land as air temperature near the ground drops overnight and reaches the dew point in the early morning

14. Fogs caused by evaporation
Fog forms over water when water temperatures are still warm, but air temperatures have fallen rapidly
Fall and early winter