Precipitation Flashcards
What happens to an engine when the engine engulfs too much water?
Engine flame out.
What is the average diameter of a raindrop?
2000 um
What are the two processes of small droplets growing to precipitation?
Ice crystal process - coalescence process
What is the Bergeron - findeisen ?
Bloody freezing ! Ice crystal process.
How to water droplets grow in size in the coalescence theory?
Collisions.
Whats a hydrometor?
Moving water particles.
Whats a suspended particle example?
Cloud - fog - mist
Whats a falling particle example?
Drizzle - rain - snow - hail
What is the diameter of drizzle?
0.5mm
What type of cloud does drizzle fall from?
Stratus.
What may happen to supercooled rain when it imapcts a surface?
Freezes.
What are snow grains?
Small white particles of ice.
Whats another word for snow pellets is blank hail.
Soft hail
What do snow pellets fall from?
Cumulus or cb
What letters are used for hail?
GR
What are the letters for snow pellets?
GS
What is the intermediate stage between the snow pellet and the hailstone?
Small hail.
Whats the diameter of ice pellets?
Less that 5mm
How are ice pellets formed?
Snowflakes melt then re freeze.
What is diamond dust?
Falls from a clear sky as ice crystals.
What is virga?
When ice or rain evaporates before it hits the ground.
What is the visibility in drizzle?
Less than 500m
Whats the visibility in heavy snow?
50m
Whats the visibility in heavy snow?
50m
Whats the visibility for blowing snow?
1m
What does FU sound for?
Smoke.
What does VA stand for?
Volcanic ash.
What does PR stand for?
Partial.
What does BC stand for?
Patches.
What does BLSN mean?
Blowing
