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Meteo > Precipitation > Flashcards

Precipitation Flashcards

1
Q

Wegerer Bergeron findeison theory

What it is

A

Accretion,

Super cooled water droplets attach themselves on ice crystals and fall due to gravity

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2
Q

Coalescence

What it is

A

All precipitation starts as water droplets above freezing

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3
Q

Cloud droplet

Size and speed

A
  1. 02mm

0. 012m/s

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4
Q

DZ

what it is
Size
Speed
Cloud

A

Drizzle
0.5mm
4m/s
Stratus

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5
Q

Rain

6 clouds
Size
Speed

A

RA
0.5-5.5mm
9m/s
Stratus, stratocumulus, altocumulus, Nimbostratus, Cb, CU.

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6
Q

Ice crystals

Abbreviation
What it is
Cloud

A

IC
Unbranched crystals
Stratocumulus

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7
Q

Snow

Code
6 clouds
What it is
Temperature
Clouds
A

SN
Branched crystals
+4C -5C
Stratus, stratocumulus, altocumulus,nimbostratus, CB, CU

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8
Q

SG

What
Size

A

Snow grains

1mm pinheads, opaque

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9
Q

Snow pellet

Size
Cloud

A

2-5mm

Stratocumulus, CB

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10
Q

PL

What it is
Size
Cloud

A

Ice pellets
5mm
Altostratus, nimbostratus

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11
Q

GR

What
Size
Speed
Cloud

A

Hail
5mm-50mmm1kg max
CB, TS

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12
Q

GS

What
Size
Cloud

A

Small hail
Less than 5mm
CB

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13
Q

FZ

What
Where

A

Freezing rain
Under nimbostratus, warm front.
Danger triangle

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14
Q

Continuous precipitation

Time
Cloud

A

60mins+

Altostratus, Nimbostratus

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15
Q

Intermittent

Time
Cloud

A

Continuous with breaks

Altostratus, stratocumulus

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16
Q

Shower

Cloud

A

Cumuliform clouds

CB CU

17
Q

Visibility with precipitation

Drizzle
Heavy rain
Moderate rain

Heavy snow
Moderate snow
Blowing snow

A

500m
1000m
3-10km

Below 50m
1000m
Go for the lowest

18
Q

Gust

Definition

A

10kt plus compared to average wind speed

Meteo (14 decks)

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