CLOUDS

Clouds may have thousands of Shapes

But They have only a limited number of Forms

Clouds are consistently rising/falling Throughout the atmosphere Within Minutes

5 Words to Remember Cirrus Meaning Hair (remember – Siraa – Highest)

Cumulus Meaning Pile/Heap (remember – Cumulate – Dheri lagaana) Stratus Meaning Layer/Sheet (remember – Strata – Layer) Alto Meaning Height (remember – Altitude – Height but middle height not Siraa/Cirrus because “Alto” is a middle-income family’s car) Nimbo Meaning Rain (remember – Nimboo – big heavy “Nimboo” like rain drops)

Everything else is just their permutation/combination

DEFINITION OF CLOUDS A visible aggregation of minute water droplets or ice particles in the air

above the ground levels is called

as the cloud

Clouds are listed according to their heights

Into 3 groups (High Middle Low) Into 10 main cloud families (3 3 4)

Recall those 5 Words

Cirrus || Cumulus || Stratus || Alto || Nimbo

HIGH CLOUDS

All high clouds are called as ‘cirro’ (remember Siraa) clouds They are present at elevation of 5 to 13 kms Composed of ice crystals Produce phenomenon called ‘halo’ Does not give rainfall/precipitations

They are of Three types

Type - 1

Cirrus Feathery Detached clouds

Sometimes in the form of white patches

Type - 2

Cirro Cumulus Small flakes or globules White patchy layers of clouds without shading Form a ‘mackerel sky’

Type – 3

Cirro Stratus Transparent whitish clouds

Fibrous veil Smooth appearance

MIDDLE CLOUDS

All middle clouds are called as the

alto clouds

(remember Alto – Middle-income family’s car, middle height) They are present in the height ranging from 2 to 7 Kms.

They of three types

Type - 1

Alto Cumulus White or grey patchy layer of cloud Dark shading on their under surfaces Sometimes wavy or parallel bonds Often they are composed of super cooled liquid droplets They may or may not give rainfall

Type - 2

Alto stratus Greyish or bluish cloud layers Fibrous appearance covering most of the sky The sun is vaguely revealed in the form of spot But the ground shadows are not cast They give out fine drizzle of snow

Type – 3 Nimbo Stratus Grey cloud layer Often very dark Thick enough to block the Sun The rain or snow falling from this cloud does not reach the ground and called as virga.

LOW CLOUDS

These are the clouds present below 2 kms of elevation

4 types of cloud families

Type – 1

Stratus Grey cloud layer Sun is visible and its outline is clearly distinguishable Also in the form of patches

Type – 2

Cumulus Dense detached clouds Sharp outline developing vertically Mount or tower like cauliflower The sunlit part is brighter and the base is dark Represent transition to the cumulo-nimbus clouds Present only during day time

Type - 3

Strato Cumulus It is a low cloud layer Dull grey in colour Consisting of Large lumpy masses with brighter intersects

Type - 4

Cumulo-Nimbus Heavy & dense cloud Anvil head Towering clouds

from the ground level to intermediate heights Heavy rainfall, thunders, lighting

High Cirrus || Cirro-Cumulus || Cirro-Stratus Middle Alto-Cumulus || Alto-Stratus || Nimbo-Stratus Low Stratus || Cumulus || Strato-Cumulus || Cumulo-Nimbus

Clouds - New.pdf

Page 5 of 27. 5 Words to Remember. Cirrus. Meaning Hair. (remember – Siraa – Highest). Cumulus. Meaning Pile/Heap. (remember – Cumulate – Dheri lagaana). Stratus. Meaning Layer/Sheet. (remember – Strata – Layer). Alto. Meaning Height. (remember – Altitude – Height but middle height not Siraa/Cirrus because ...

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