retreating and post monsoon
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. During October-November, with the movement of the Sun towards south monsoon trough low pressure. Trough over Northern Plains becomes weak.
ii. High-pressure system gradually takes over.
iii. South-west monsoon winds become weak and start withdrawing.
iv. By the beginning of October, monsoon withdraws from Northern Plains.
v. October-November is a period of transition from hot rainy season to dry winter conditions.
vi. Monsoon retreat is marked by clear sky and rise in temperature.
a. Day temperatures are high.
b. Nights are cool and pleasant.
c. Land is still moist.
d. Owing to the conditions of high temperature and humidity weather becomes rather oppressive during the day.
e. This is commonly known as 'October heat'.
vii. After October 15, the mercury begins to fall rapidly, particularly, in Northern India.
viii. Low pressure conditions prevailing over North-western India get transferred to Bay of Bengal by early November.
a. This shift is associated with occurrence of cyclonic depressions commonly known as tropical cyclones.
b. They originate over the Andaman Sea.
c. Some of them manage to cross the eastern coasts of India.
d. They cause heavy and widespread rains.
e. They are often very destructive.
1. Thickly populated deltas of the Godavari, the Krishna and the Kaveri are frequently struck by these cyclones.
2. They cause immense damage to life and property.
3. Sometimes, they also arrive at the coasts of Orissa, West Bengal and Bangladesh.
ix. Bulk of the rainfall of the Coromandal coast is derived from depressions and cyclones.
ii. High-pressure system gradually takes over.
iii. South-west monsoon winds become weak and start withdrawing.
iv. By the beginning of October, monsoon withdraws from Northern Plains.
v. October-November is a period of transition from hot rainy season to dry winter conditions.
vi. Monsoon retreat is marked by clear sky and rise in temperature.
a. Day temperatures are high.
b. Nights are cool and pleasant.
c. Land is still moist.
d. Owing to the conditions of high temperature and humidity weather becomes rather oppressive during the day.
e. This is commonly known as 'October heat'.
vii. After October 15, the mercury begins to fall rapidly, particularly, in Northern India.
viii. Low pressure conditions prevailing over North-western India get transferred to Bay of Bengal by early November.
a. This shift is associated with occurrence of cyclonic depressions commonly known as tropical cyclones.
b. They originate over the Andaman Sea.
c. Some of them manage to cross the eastern coasts of India.
d. They cause heavy and widespread rains.
e. They are often very destructive.
1. Thickly populated deltas of the Godavari, the Krishna and the Kaveri are frequently struck by these cyclones.
2. They cause immense damage to life and property.
3. Sometimes, they also arrive at the coasts of Orissa, West Bengal and Bangladesh.
ix. Bulk of the rainfall of the Coromandal coast is derived from depressions and cyclones.
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