El Niño and Weak Monsoon Explained: Why Maharashtra Rainfall Has Stalled and What It Means for India

Current event: The southwest monsoon has not progressed uniformly across India. It brought early rain to Kerala, parts of Karnataka, Tamil Nadu, Lakshadweep and the northeastern region, but its western progress slowed over Maharashtra.

Maharashtra concern: The visible newspaper report highlights that the monsoon’s advance has stalled over Maharashtra and that rainfall shortfalls are severe in western and central subdivisions. This is important because Maharashtra is a major agricultural, industrial and urban state.

All-India concern: IMD’s extended forecast shows that India as a whole had a significant early-season rainfall deficit, with Central India facing the sharpest shortfall. This matters because the monsoon core zone contains many rainfed agricultural areas.

UPSC linkage: For GS3, this is a classic climate-agriculture-economy topic involving weather systems, crop planning, inflation and disaster risk management.

Basic meaning: The southwest monsoon is the seasonal wind system that brings moisture-laden winds from the Indian Ocean towards the Indian subcontinent during June-September.

Rainfall importance: It supplies the major share of India’s annual rainfall and supports agriculture, reservoirs, groundwater recharge, hydropower, drinking-water systems and rural demand.

Agricultural role: Kharif crops are sown with the arrival of monsoon rains. Timely rainfall is especially important for paddy, pulses, oilseeds, cotton, soybean and coarse cereals.

Economic role: A weak monsoon can affect farm output, rural wages, food prices, reservoir storage, electricity demand and overall macroeconomic stability.

Kerala onset: IMD states that the southwest monsoon normally sets in over Kerala around 1 June and advances northwards in surges.

Two branches: The monsoon advances through the Arabian Sea branch along the west coast and the Bay of Bengal branch over the east and northeast.

Northern Limit of Monsoon: The Northern Limit of Monsoon is the northernmost boundary up to which the monsoon has advanced on a given day.

Normal spread: The monsoon generally covers the entire country around mid-July, but its path and speed can vary depending on oceanic, atmospheric and regional weather systems.

Weak Arabian Sea support: The Arabian Sea branch needs strong westerly and southwesterly winds to push moisture into the west coast and interior Maharashtra. IMD’s extended forecast noted weaker-than-normal cross-equatorial flow over the Arabian Sea.

Dry wind influence: Stronger northerly or northwesterly winds can act as a barrier against incoming monsoon moisture, reducing rainfall over Maharashtra.

Missing support systems: Low-pressure areas, offshore troughs and cyclonic circulations over the Arabian Sea or Bay of Bengal often help pull the monsoon forward. When these systems are weak or absent, monsoon progress slows.

MJO phase: The Madden-Julian Oscillation can support or suppress rainfall depending on its phase. If it is not in a favourable phase for India, the monsoon may weaken temporarily.

Definition: El Niño is the warm phase of the El Niño-Southern Oscillation, marked by abnormal warming of the central and eastern equatorial Pacific Ocean.

Atmospheric impact: This warming changes pressure patterns, trade winds and tropical convection. These changes can disturb the Walker circulation and weaken rainfall over parts of South Asia.

Indian monsoon link: El Niño years are often associated with below-normal rainfall over India, though the relationship is not automatic. Some El Niño years have not produced severe drought because other systems such as the Indian Ocean Dipole or intra-seasonal rainfall pulses can modify the outcome.

Current relevance: IMD has said that El Niño conditions are present over the equatorial Pacific and are expected to strengthen during the southwest monsoon season.

Not always: The newspaper graphic correctly indicates that India has seen many El Niño episodes since the 1950s, but not every El Niño has produced a severe rainfall deficit.

Modifying factors: Indian monsoon rainfall depends on ENSO, Indian Ocean Dipole, Eurasian snow cover, land-sea temperature contrast, monsoon trough position, MJO, low-pressure systems and local convection.

Positive IOD support: A positive Indian Ocean Dipole can sometimes offset El Niño’s negative impact by warming the western Indian Ocean and supporting rainfall over India.

Distribution problem: Even if all-India rainfall is not extremely low, rainfall may be poorly distributed across time and space. This affects sowing, crop growth and reservoir recharge.

Definition: The Indian Ocean Dipole is an ocean-atmosphere pattern involving temperature differences between the western and eastern Indian Ocean.

Positive IOD: A positive IOD usually means the western Indian Ocean is warmer than the eastern Indian Ocean. This can strengthen convection near India and support monsoon rainfall.

Negative IOD: A negative IOD can reduce rainfall support for India and may worsen weak monsoon conditions.

Current situation: IMD has reported neutral IOD conditions. This means the IOD is not yet acting as a strong positive support against El Niño’s drying tendency.

Definition: The Madden-Julian Oscillation is an eastward-moving band of clouds, rainfall, winds and pressure anomalies that travels around the tropics.

Rainfall link: When the MJO is in a favourable phase over the Indian Ocean, it can increase cloud formation, low-pressure systems and rainfall over India.

Current issue: The newspaper report mentions that the MJO has not been favourable enough to support strong monsoon rainfall over India at this stage.

UPSC relevance: MJO is important for Prelims because it is a technical climate term, and for Mains because it explains intra-seasonal monsoon variability.

Agricultural exposure: Maharashtra has large rainfed areas, especially in Marathwada and Vidarbha. Delayed monsoon affects cotton, soybean, pulses and coarse cereals.

Regional diversity: Konkan receives heavy coastal rainfall in normal years, while Vidarbha and Marathwada are more drought-prone and depend on timely seasonal rainfall.

Urban water risk: Mumbai and other cities depend on monsoon-fed reservoirs. Weak early rain can create short-term water stress before reservoir recharge improves.

Rural distress: Delayed sowing can increase input costs, force re-sowing, reduce crop choice flexibility and affect farm incomes.

Crop supply channel: Lower or delayed rainfall can reduce sowing area, germination, crop yield and market arrivals.

Perishable items: Vegetables, fruits and milk supply chains are sensitive to heat and water stress. Price spikes often begin in perishables before affecting broader food inflation.

Pulses and oilseeds: Rainfed pulses and oilseeds are vulnerable to poor rainfall. India already imports some pulses and edible oils, so domestic shortfall can raise import dependence.

RBI concern: Weather-related uncertainty is a major inflation risk because food has a large weight in India’s consumer price index.

Forecasting: IMD provides long-range forecasts, extended-range forecasts, district rainfall monitoring and weather warnings.

Agricultural advisories: The agriculture ministry, ICAR institutions, state agriculture departments and Krishi Vigyan Kendras issue crop advisories on sowing windows, seed choice, irrigation and contingency cropping.

Drought management: States monitor rainfall, crop condition, reservoir storage and soil moisture. Relief measures may be considered under disaster management norms if drought-like conditions emerge.

Food security buffers: India’s foodgrain stocks, procurement system, public distribution system and import policy tools help manage supply shocks.

Increased variability: Climate change does not simply mean less rain everywhere. It can increase extreme rainfall events, longer dry spells and uneven distribution.

Warmer atmosphere: A warmer atmosphere can hold more moisture, increasing the risk of intense rainfall in short bursts, even in years with seasonal deficits.

Agricultural challenge: Farmers need not only total rainfall but timely and evenly distributed rainfall. Extreme dry-wet cycles can damage crops more than a simple seasonal average suggests.

Policy implication: India needs climate-resilient agriculture, better drainage, drought-proofing, water harvesting and real-time advisories.

GS1 link: Indian monsoon, climate patterns, physical geography and rainfall distribution.

GS3 link: Agriculture, food security, inflation, disaster management, climate change, water resources and environmental governance.

Prelims link: ENSO, El Niño, IOD, MJO, LPA, NLM, IMD, rainfall categories and monsoon branches.

Mains link: The topic can be used in answers on climate adaptation, agricultural resilience, disaster preparedness, water governance and inflation management.

Strengthen district-level contingency crop planning so that farmers receive timely advice on delayed sowing, alternative crops, seed varieties and re-sowing risk.

Expand real-time agro-meteorological advisories through IMD, ICAR, Krishi Vigyan Kendras, state agriculture departments and mobile platforms.

Improve rainwater harvesting, farm ponds, watershed development and micro-irrigation in rainfed regions such as Marathwada and Vidarbha.

Use reservoir-based water budgeting for urban centres and irrigation commands before the monsoon deficit becomes a drinking-water crisis.

Strengthen food inflation management through buffer stocks, anti-hoarding enforcement, calibrated imports and better market intelligence.

Promote climate-resilient crops such as millets, pulses and short-duration varieties in regions vulnerable to delayed rainfall.

Improve monsoon research by integrating IMD forecasts, ocean observations, satellite data, AI-based modelling and local rainfall monitoring.

Build long-term resilience through climate-resilient agriculture, crop insurance, drought-proofing and decentralised water governance.