Northern Limit of Monsoon (NLM) South to North Journey of Kalavarsham

Northern Limit of Monsoon (NLM) South to North Journey of Kalavarsham

The Southwest Monsoon or rainy season begins its journey in the month of June and continues till September. This season is marked by the onset and progression of the monsoon, when winds blow inland from the Arabian Sea and the Bay of Bengal. These winds bring moisture with them. When these winds hit or descend the mountain walls, rainfall begins. Autumn occurs between October and November.

southwest monsoon arrived at Maharashtra
southwest monsoon clouds

This period is called the return of monsoon. During this autumn, winds blow from the mainland to the Bay of Bengal. South India, especially Tamil Nadu and Andhra Pradesh receives rain during this season. The formation of low pressure over the Tibetan Plateau due to high temperatures during summer causes this southwesterly wind. Permanently high temperature in the southern part of the Indian Ocean (east northeast of Madagascar in summer). Strong winds bring heavy rains to many parts of the country.

Kerala Onset location of Monsoon

The monsoon usually reaches the southern part of the peninsula in the first week of June. After hitting the south side. The branch is divided into two parts: the Arabian Sea branch and the Bay of Bengal branch. Both legs move at a fast pace. The Arabian Sea branch moves north along the Western Ghats, reaching Mumbai around June 10 and covering soon after Saurashtra-Kutch and most of the central Deccan plateau.

The Bay of Bengal branch reaches Assam in the first week of June and heads west through the Theos Mountain range. It gives rain to the plains of the Ganges. Both branches reunite in the northwestern part of the Ganges plain. It usually rains in Delhi until the end of June. From the Bay of Bengal branch. In the first week of July, monsoon rains will cover the states of Uttar Pradesh, Punjab, Haryana and eastern states.

Northern Limit of South West Monsoon

The Northern Limit of Monsoon is the northernmost boundary of India that receives monsoon rains on a given day. It is directly related to the onset and progression of monsoons. The term appears from the beginning to the withdrawal of the monsoon. The southwest monsoon usually arrives over Kerala around June 1.

It usually moves northward in waves and covers the entire country by July 15. The western arm of the monsoon generally moves rapidly in the initial phase. After the launch, it will pass through Mumbai and reach Dahan by June 10. At this time, the eastern arm covers only northeast India. The slowest progress is in western Rajasthan. Normally, the monsoon reaches western Rajasthan about 12 days after it starts over Delhi on June 29.

Withdrawal of monsoon

The retreat or retreat of the monsoon is a more gradual process. In early September it will begin in the northwestern states. Up to half October completely abandons the northern half of the peninsula. The exit is from the southern half of the peninsula. Relatively fast. By early December, monsoon retreated from other parts of the country.

Effect of Monsoon on Indian Economy

Monsoon is one of the most important natural phenomena for India and the world. It brings life-giving rains that nourish crops, replenish water sources, and bring relief from drought. This water would normally be transported by ocean evaporation; however, during the monsoon season, winds carry moisture across the land producing heavy rains that provide much-needed water to areas that would otherwise struggle to support crops or vegetation.

The monsoon season has a great importance in the Indian economy, not only through agriculture, but also through other sectors such as industry and services. It is estimated that India’s GDP could grow by 3% in a good monomonth year due to increased agricultural production.

Conversely, if below-average weather or drought conditions prevail, agricultural production may decline significantly, leading to economic slowdown for the entire country. In addition to the direct contribution to GDP growth and agricultural production, monsoons affect other sectors of the economy, such as energy production, transportation, manufacturing and tourism.

Lack of rainfall can lead to reduced availability of hydroelectric power and disruption of transportation networks due to damage to infrastructure caused by floods or landslides. Monsoon is vital to agriculture in India as it provides the moisture necessary for crop growth. Without this rain, farmers had to rely heavily on irrigation and manually moving water from reservoirs or other water sources. That’s a lot of therapy and time.

Rainfall is also needed for monsoon power generation, as India relies heavily on hydroelectricity. Heavy rains during the monsoon season increase water levels in rivers and reservoirs, leading to increased electricity production by hydroelectric power plants. This is especially true in countries that do not have abundant other resources, such as coal or natural gas.

Monsoon in Kerala

The monsoon season in Kerala is from June to September, characterized by rains and cool temperatures. The state experiences 2 monsoon seasons – south west monsoon (Edavappathi) from June to August and north east monsoon (Thulavarsham) from October to November. These abundant rains refresh the earth, turning it into a most beautiful paradise. During the monsoons, Kerala shows its full splendor, offering a feast for the senses.

The rain-drenched Western Ghats, with their mist-shrouded peaks and chasms, offer an awe-inspiring experience. The lush tea plants, paddy fields and dense forests come alive with vivid colors, making it an ideal time for nature enthusiasts and photographers to capture the rugged beauty of Kerala. Monsoon tourism has gained immense popularity in Kerala as visitors are mesmerized by the unique experiences it offers.

The tranquil backwaters of Alleppey and Kumarakom are a must visit this season. Peaceful houseboat cruises allow you to immerse yourself in the rhythm of the rain as you sail through emerald waters surrounded by lush greenery. Kumarakom, a serene village situated on the banks of Vembanad Lake, is the real gem of Kerala.

During the monsoon, Kumarakom reveals its pristine beauty, with rain-soaked landscapes and blooming water lilies. Explore the Kumarakom Bird Sanctuary, home to many migratory and resident birds, and witness their fascinating activities amidst the lush greenery.

monsoon brings wet weather

At the end of winter, warm and moist air from the southwest Indian Ocean blows into countries like India, Sri Lanka, Bangladesh and Myanmar. The summer monsoon brings wet weather and torrential rains to these regions. India and Southeast Asia depend on the summer monsoon. India and Southeast Asia experience the summer monsoon. For example, agriculture relies on annual rainfall.

Many areas of these countries do not have large irrigation systems surrounding lakes, rivers, or areas where snow melts. Aquifers, or sources of groundwater, are shallow. The summer monsoon fills wells and aquifers for the rest of the year. Rice and tea are some of the crops whose cultivation depends on the summer monsoon. Dairy farms, which make India the world’s largest milk producer, also depend on monsoon rains to keep cows healthy and well-fed.

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Editorial Desk at, This is Team of Meteorologists and Senior Weather Journalist and Experts. Metbeat Weather The Only Pvt. Weather Firm In Kerala Since 2020

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