Collision and Coalescence
What is the temperature for a warm cloud?
Warmer than 32°F
No melting has occurred after falling.
*Hint: This was on the chart in Dr.Preston's video on 10/30*
What is the temperature for a cold cloud?
Colder than 32°F
What does a raindrop actually look like?
A hamburger bun
What forms in warm clouds?
Only water droplets
Snow melts and refreezes before reaching the surface.
*Hint: This was on the chart in Dr.Preston's video on 10/30*
sleet
What temperature is supercooled water common between?
(-20°C)- 0°C
___" of snow = ___" of water
10" snow = 1" water
When do you typically see the larger raindrops in a rain shower?
Typically occur near the beginning of a rain shower.
Snow melts and does not refreeze.
*Hint: This was on the chart in Dr.Preston's video on 10/30*
Rain
Height in cloud where there is mixed ice and water?
Height in cloud where there is ice only?
1000m
5500m
7600m
What do the return echos of Doppler radars do?
Determine how much rain there is
Do larger or smaller drops fall faster and how many bigger is a raindrop compared to a cloud droplet?
Larger
50x
Snow melts and refreezes on contact with the surface.
*Hint: This was on the chart in Dr.Preston's video on 10/30*
Freezing rain
1)________ is when falling ice crystals may freeze supercooled droplets on contact, producing larger ice particles.
2) _______ is when falling ice crystals may collide and stick to other ice crystals producing snowflakes.
3) _______ is when falling ice particles may collide and fracture into many tiny ice particles.
1) Accretion
2) Aggregation
3) Fracturing
Why is a raindrop shaped the way it is?
Pressure on the bottom flattens it out.