The El Niño isn’t ‘Super’ yet. But will ‘The Little Boy’ cast a long shadow over India?

The India Meteorological Department (IMD) has forecast the 2026 southwest monsoon at 90% of the Long Period Average (LPA), signalling a "below-normal" season...

What Happened

The India Meteorological Department (IMD) has forecast the 2026 southwest monsoon at 90% of the Long Period Average (LPA), signalling a "below-normal" season — a downward revision from an earlier 92% forecast.
El Niño conditions have developed in the equatorial Pacific Ocean, with all four Niño-region indices remaining above 0°C since late April 2026 and the Niño 3.4 anomaly at +0.4°C.
The southwest monsoon arrived over Kerala on June 4, 2026 — three days later than the normal onset date of June 1.
IMD assigns a 60% probability of a deficient season; central India, northwest India, and south peninsular India are projected to receive below-normal rainfall.
Experts note India is better prepared today through buffer food stocks, MSP-based procurement, and expanded irrigation infrastructure, but approximately 60% of farmers still depend on monsoon rainfall for the kharif season.

Static Topic Bridges

El Niño–Southern Oscillation (ENSO)

ENSO is an irregular oscillation of ocean surface temperatures and atmospheric pressure across the tropical Pacific Ocean. During the El Niño (warm) phase, trade winds weaken or reverse, allowing warm water to accumulate in the central and eastern Pacific. This disrupts the Walker Circulation — the east-west atmospheric convection cell driven by pressure differences across the equatorial Pacific — suppressing convective rainfall over the Indian subcontinent.

The Walker Circulation, described by Gilbert Walker in the early 20th century, drives normal monsoon conditions; its weakening during El Niño reduces moisture influx into India.
ENSO is monitored using five indices (Niño 1+2, Niño 3, Niño 3.4, Niño 4, ONI); the Oceanic Niño Index (ONI) — a 3-month running mean of SST anomaly in the Niño 3.4 region — is the standard metric; +0.5°C or above for five consecutive overlapping 3-month periods = El Niño.
Historical correlation: Of the 27 El Niño years between 1951 and 2023, approximately 60% coincided with below-normal Indian monsoon rainfall.
La Niña (cool phase) is associated with above-normal monsoon rainfall in India.

Connection to this news: The developing El Niño — with Niño 3.4 anomaly already positive — is the primary driver behind IMD's downward revision of the 2026 monsoon forecast to 90% of LPA.

Indian Ocean Dipole (IOD) — Partial Countervailing Force

The Indian Ocean Dipole (IOD) is an ocean-atmosphere phenomenon defined by the gradient in sea surface temperatures (SST) between the western Indian Ocean (near the Arabian Sea) and the eastern Indian Ocean (near the Indonesian coast). A positive IOD means the western Indian Ocean is anomalously warmer than the east. This drives stronger onshore moisture flow and enhanced monsoon rainfall over India, particularly central and western regions.

First described by Saji et al. (1999) in the journal Nature.
IOD is measured by the Dipole Mode Index (DMI) — the difference in SST anomalies between the western (50–70°E, 10°S–10°N) and eastern (90–110°E, 10°S–0°N) Indian Ocean.
Positive IOD years (e.g., 1983, 1994, 1997) saw normal or excess monsoon rainfall despite concurrent El Niño events — demonstrating its partial countervailing capacity.
A positive IOD is forecast to emerge by late July–August 2026; however, IMD currently forecasts neutral IOD during the core monsoon months of June–September.
Negative IOD compounds El Niño's drying effect on India.

Connection to this news: A moderate-to-strong positive IOD, if it develops in time, could partially offset El Niño's suppressive effect on the 2026 monsoon — the crucial unknown for the season's final outcome.

Monsoon and Food Security Framework

India's southwest monsoon (June–September) delivers approximately 70–80% of the country's annual rainfall and irrigates about 52% of net sown area. The kharif crop cycle — covering rice, cotton, sugarcane, pulses, coarse cereals — is directly dependent on monsoon timing and distribution. Below-normal monsoon years historically trigger: (i) reduced kharif output; (ii) inflationary pressure on food prices; (iii) reduced groundwater recharge affecting rabi crops.

India's LPA for southwest monsoon rainfall: 868.6 mm (computed over 1971–2020 by IMD; previously 880 mm over 1951–2000).
"Normal" monsoon: 96–104% of LPA; "Below normal": 90–95% LPA; "Deficient": below 90% LPA.
Buffer stock norms (Food Corporation of India): wheat + rice stock held quarterly; released via NFSA (National Food Security Act, 2013) PDS and OMSS (Open Market Sale Scheme) to stabilise prices.
National Food Security Act, 2013 covers approximately 81.35 crore beneficiaries (67% of population) under targeted PDS.
Prime Minister Fasal Bima Yojana (PMFBY, 2016) provides crop insurance; premium capped at 2% for kharif crops, 1.5% for rabi, 5% for commercial/horticultural crops.

Connection to this news: A 10% shortfall from LPA places the monsoon at the lower end of the "below-normal" band, sufficient to stress kharif sowing and require activation of government price stabilisation and buffer-stock mechanisms.

Key Facts & Data

2026 IMD monsoon forecast: 90% of LPA (revised down from 92%)
India's LPA for southwest monsoon: 868.6 mm (base period 1971–2020)
Southwest monsoon onset over Kerala: June 4, 2026 (normal: June 1)
ENSO threshold: Niño 3.4 SST anomaly ≥ +0.5°C for 5 consecutive overlapping 3-month periods
Share of Indian agriculture dependent on monsoon: ~52% of net sown area is rainfed
Kharif crops at risk: rice, pulses, cotton, coarse cereals, sugarcane
PMFBY kharif crop premium cap: 2% of sum insured (farmer share)
Positive IOD historically offset El Niño effects in 1983, 1994, and 1997