IMD ने केरल में 26 मई, 2026 को शुरुआती दक्षिण-पश्चिम मानसून की शुरुआत का पूर्वानुमान किया – ENSO प्रभाव

<p>The <span class="key-term" data-definition="India Meteorological Department (IMD) — India's national weather agency responsible for forecasting, monitoring and issuing warnings on weather phenomena; crucial for disaster management and agricultural planning (GS3: Environment)">IMD</span> has projected that the <span class="key-term" data-definition="Southwest Monsoon — the primary rain‑bearing system for India that originates over the Indian Ocean and moves north‑eastward, supplying about 70 % of the country's annual rainfall (GS3: Environment)">Southwest Monsoon</span> will set in over Kerala on <strong>May 26, 2026</strong> with a model error of ± 4 days. This early onset follows last year’s May 24 onset and precedes the usual June 1 arrival.</p> <h3>Key Developments</h3> <ul> <li>Monsoon onset over Kerala expected on <strong>May 26, 2026</strong> (± 4 days).</li> <li>Favourable conditions for the monsoon to advance over the South Bay of Bengal, Andaman Sea and Andaman &amp; Nicobar Islands within the next 24 hours.</li> <li>IMD projects an overall below‑normal rainfall for the 2026 season, estimating <strong>80 cm</strong> against a long‑period average of <strong>87 cm</strong>.</li> <li>Emergence of <span class="key-term" data-definition="El Niño — a warm phase of the El Niño‑Southern Oscillation that suppresses rainfall over India, often leading to drought‑like conditions; a key climate variable for UPSC (GS3: Environment)">El Niño</span> conditions is cited as the main reason for the anticipated deficit.</li> </ul> <h3>Important Facts</h3> <p>The monsoon season (June‑September) contributes nearly 70 % of India’s annual rainfall, making it vital for agriculture, reservoir replenishment and groundwater recharge. A below‑normal monsoon can strain crop yields, affect food‑grain prices and pressure the fiscal deficit. The forecast also notes a transition from the hot, dry pre‑monsoon period to a cooler, rain‑laden climate, providing relief from scorching summer temperatures across the sub‑continent.</n<p>In its May 1 monthly outlook, the IMD warned that the <span class="key-term" data-definition="ENSO (El Niño‑Southern Oscillation) — a coupled ocean‑atmosphere phenomenon in the equatorial Pacific that oscillates between El Niño (warm) and La Niña (cool) phases, influencing global weather patterns; essential for UPSC (GS3: Environment)">ENSO</span>‑neutral conditions were shifting toward an El Niño phase, a development that typically curtails Indian monsoon rainfall.</p> <h3>UPSC Relevance</h3> <p>Understanding the monsoon’s timing and variability is critical for several UPSC topics: climate‑change impacts on agriculture (GS3), disaster management and early warning systems (GS3), and the economic implications of rainfall deficits on food security and fiscal health (GS3). The role of the <span class="key-term" data-definition="India Meteorological Department (IMD) — see definition above (GS3: Environment)">IMD</span> exemplifies inter‑agency coo