Precipitation

Question 1

The ice crystals (Bergeron) process is ?

At what temp & what does it contain?

Answer 1

Precipitation forms in clouds colder than 0⚫️C. Contains ice crystals & SCWD

Water vapour turns to ice crystals. These grow to snowflakes. When large enough, start to fall. Melting into rain when freezing level above surface.

Question 2

Coalescence theory

At what temp?

Answer 2

Precipitation forms in clouds, warmer than 0⚫️C

As tiny w droplets ascend in the cloud, they collide with each other, meaning they grow.

Question 3

Drizzle DZ size.

Which cloud?

Answer 3

0.5mm.

Stratiform

Question 4

Rain RA clouds?

Answer 4

Stratus or cumulus

Question 5

Snow SN
Temperature
Cloud

Answer 5

4⚫️C to -5⚫️C

Cumulus

Question 6

Snow grains SG

Cloud

Answer 6

Stratiform

Question 7

Small hail (GS) 
Cloud

Answer 7

Cumulonimbus

Question 8

Hail GR
Size
Cloud

Answer 8

5-50mm

Cumulonimbus

Question 9

Freezing rain FZRA

Cause by?

Answer 9

Frontal inversions

Question 10

(Continuity of precipitation)

Continuous

Answer 10

60 mins, no breaks

Question 11

(Continuity of precipitation)

Intermittent

Answer 11

Continuous with breaks

Question 12

(Continuity of precipitation)

Showers

Answer 12

Cumuliform clouds

Question 13

(Intensity of precipitation)

Light

Answer 13

Less than 0.5mm/hr

Question 14

(Intensity of precipitation)

Moderate

Answer 14

0.5mm to 4mm /hr

Question 15

(Intensity of precipitation)

Heavy

Answer 15

Greater than 5mm / hr