CAP 13 PRECIPITATION

Question 1

BERGERON FINDEISEN ?(ICE CRYSTALLS)

Answer 1

ICE CRYSTALS GROW AT THE EXPENSE OF LIQUID DROPLETS.FORMS IN CLOUDS COLDER THAN 0 DEGREES CONTAINING ICE CRYSTALS AND SUPERCOOLED WATER DROPLETS.
BASICALLY WATER VAPOUR SUBLIMATES ONTO ICE CRYSTALS AND SCWD WILL ALSO FREEZE ON COLLISION WITH ICE CRYSTALLS

Question 2

COALESCENCE THEORY

Answer 2

Water droplets becomes larger with the collision with other droplets.it occurs in clouds warmer than 0c

Question 3

Drizzle (DZ)

Answer 3

Diameter less than 0.5mm

Falls from stratus

Question 4

Rain (RA)

Answer 4

From 0.5mm to 5.5mm in diameter

Rain possible from any cloud except stratus and cirrus clouds type

Question 5

Snow (SN)

Answer 5

Ice crystals falling from temp warmer than -5 .generally they stick together.mostle falls from any cloud

Question 6

Snow grains (SG)

Answer 6

Small opaque white particles of ice
Diameter less than 1mm
Falls mostly stratus or fog and never in the form of shower

Question 7

Snow pellets ( soft hail )

Answer 7

White and opaque ice particles .
Diameter may be large as 5 mm
Fall from cumulus or cumulunimbus

Question 8

Hail(GR)

Answer 8

Can be transparent or opaque
Diameter from 5-50 mm
Generally in CBs

Question 9

Small hail (GS)

Answer 9

Translucent ice particles
Diameter around 5mm
Is an intermediate stage between snow pallet and hailstone
Occur in cumulunimbus

Question 10

Ice pellets (PL)

Answer 10

Transparent ice particles
Diameter less than 5mm
Falls from nimbostratus or altostrartus
Usully the fall into a subcloud layer of warm air where it melts,then fall into a cold air below 0c where it freeze.
Rain is falling from a layer (below 0c)then it goes through a layer of temp ( above 0C) usually thick 5000/10000ft from ground,then it goes through a layer og cold temp below 0c which freeze to ice pellelts .if there is not this last layer (ore not thick enough) ice rain is formed instead.

Question 11

Diamond dust/ice Crystals (IC)

Answer 11

Precipitation from a clear sky in very small ice crystals.

Forms in temperature less than -10 (rapid cooling)

Question 12

Virga ?

Answer 12

Ice crystals or raindrops which evaporates before reaching the ground.
Usually it brings microburst downdrafts

Question 13

Signs for light,moderate,heavy?

Answer 13

Light&raquo_space;> -
Moderate» nothing
Heavy» +

Question 14

Following abbreviations stand for:

MI,BC,PR,DR,BL,SH,TS,FZ,

Answer 14

MI>>SHALLOW
BC>>PATCHES
PR>>PARTIAL
DR>>DRIFTING
BL>>BLOWING
SH>>SHOWER
TS>>THUNDERSTORM
FZ>>FREEZING

Question 15

FOLLOWING ABBREVIATIONS STANDS FOR:

DZ,RA,SN,SG,PL,GR,GS,BR,FG,FU,VA,DU,SA,HZ,PO,SQ,FC,DS,SS

Answer 15

DZ>>DRIZZLE
RA>>RAIN
SN>>SNOW
SG>>SNOW GRAINS
PL>>ICE PELLETS
GR>>HAIL
GS>>SMALL HAIL OR SNOW PELLET
BR>>MIST
FG>>FOG
VA>>VOLCANIC ASH
DU>>DUST
SA>>SAND
HZ >>HAZE
PO>>DUST/SAND WHIRLS
SQ>>SQUALLS
FC>>FUNNEL CLOUD OR WATER SPOUT
DS>>DUST STORM
SS>>SAND STORM

Question 16

VISIBILITY PRECIPITATION IN :
MODERATE RAIN,
HEAVY RAIN,
DRIZZLE,
MODERATE SNOW
HEAVY SNOW
BLOWING SNOW

Answer 16

MODERATE RAIN>>3-10 KM
HEAVY RAIN >> BELOW 1000m
DRIZZLE>>   500m. To 3000m 
MODERATE SNOW>>1000m
HEAVY SNOW >> BELOW 50 m
BLOWING SNOW>> GREATLY REDUCE down to  1m

Question 17

In which clouds rain is possbile?
Drizzle
Snow
Snow grains
Snow pellets
Diamond dust
Hail large and small
Ice pellets

Answer 17

Rain>>Every cloud except stratus and cirrus
Drizzle>> only stratus
Snow>>every cloud
Snow grains>>stratus or  fog
Snow pellets>> stratocumulus, cumulus ,CBs
Diamond dust>> no clouds  needed
Hail >> CBs
Ice pellets>> altostratus ,nimbostratus