Geography📖 3 min read

IMD Predicts 'Below Normal' Monsoon for August-September

The India Meteorological Department (IMD) has issued a forecast indicating a 'below normal' monsoon for the latter half of the season.

Source: GNews India Climate
Summary of News

The India Meteorological Department (IMD) recently announced its updated forecast for the 2024 Southwest Monsoon season. The IMD predicts that rainfall during August and September is likely to be 'below normal'. Specifically, the rainfall for these two months is expected to be 94% of the Long Period Average (LPA), with a model error margin of 8%. This forecast follows an earlier prediction of a normal monsoon for the entire season. The IMD highlighted that the El Ni o conditions, which typically lead to reduced rainfall in India, are expected to strengthen during this period. This updated outlook from the IMD is crucial for agriculture and water management across the country.

Why It Matters

This IMD monsoon forecast is vital for competitive exams, especially for topics related to Indian Geography, Agriculture, and Economy in UPSC GS Paper I and III, and SSC General Awareness. Aspirants should understand the impact of monsoon variations on India's agrarian economy, food security, and water resources. Knowledge of meteorological terms like LPA and El Ni o is also frequently tested.

Key Points for Exam
  • IMD predicts 'below normal' monsoon for August-September 2024.
  • Rainfall for Aug-Sept is expected to be 94% of the Long Period Average (LPA).
  • The forecast has a model error margin of 8%.
  • El Ni o conditions are expected to strengthen during this period.
  • The Southwest Monsoon season in India typically runs from June to September.
  • IMD is the primary agency for meteorological observations and forecasts in India.
Important Keywords Explained
India Meteorological Department (IMD)organization

The IMD is an agency of the Ministry of Earth Sciences of the Government of India. It is the principal agency responsible for meteorological observations, weather forecasting, and seismology in India. It was established in 1875 and has its headquarters in New Delhi. IMD provides crucial weather information for various sectors, including agriculture, aviation, and disaster management.

Long Period Average (LPA)concept

LPA refers to the average rainfall recorded over a specific region for a long period, typically 50 years. For the entire country, the LPA of monsoon rainfall (June to September) is 87 cm. IMD uses LPA as a benchmark to classify monsoon rainfall as normal, above normal, or below normal, helping to assess the monsoon's performance.

El Ni oconcept

El Ni o is a climate pattern that describes the unusual warming of surface waters in the eastern tropical Pacific Ocean. It is part of a larger phenomenon called the El Ni o-Southern Oscillation (ENSO). El Ni o can significantly impact global weather patterns, often leading to reduced monsoon rainfall in India and increased drought conditions in some regions.

Additional Facts & Context
1A monsoon is considered 'below normal' if rainfall is between 90% and 96% of the LPA.
2The IMD uses a multi-model ensemble (MME) forecasting system for its predictions.
3India receives about 70% of its annual rainfall during the Southwest Monsoon season.
4The monsoon typically hits the Kerala coast around June 1st each year.
Examiner's Tip

UPSC often asks about the factors influencing the Indian monsoon, such as El Ni o and La Ni a, and their socio-economic impacts. SSC exams frequently test basic facts about IMD, monsoon seasons, and related geographical terms.

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Memory Trick

Remember 'IMD' for 'India Monsoon Data' and 'El Ni o' as 'No Rain' for India.

Frequently Asked Questions

What is the significance of IMD's 'below normal' monsoon forecast for India?

IMD's 'below normal' monsoon forecast is significant because it indicates potential challenges for India's agriculture sector, which heavily relies on monsoon rains. It could lead to lower crop yields, increased food prices, and water scarcity in various regions, impacting the overall economy and rural livelihoods.

How does El Ni o affect the Indian monsoon?

El Ni o typically affects the Indian monsoon by causing a reduction in rainfall. The warming of Pacific Ocean waters during El Ni o alters atmospheric circulation patterns, weakening the monsoon winds that bring rain to India. This often results in drought-like conditions and below-average precipitation across the subcontinent.

What is the Long Period Average (LPA) for India's monsoon rainfall?

The Long Period Average (LPA) for India's monsoon rainfall (June to September) is 87 cm. This figure is the average rainfall recorded over a 50-year period and serves as a baseline for IMD to categorize the monsoon's performance each year.

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