Monsoon advances into Karnataka, may reach Mumbai by June 15

📌 Summary:

• The Southwest Monsoon has advanced up to Karnataka and is expected to reach the Mumbai coastline by June 10-15, with conditions favourable for further advance, per the IMD
• Monsoon had landed in Kerala on June 4; IMD forecasts widespread rainfall over Kerala, Karnataka, Tamil Nadu and Lakshadweep over 2-3 days as moisture-laden winds strengthen
• Heavy to very heavy rainfall forecast for Kerala on June 7; intensification over the west coast and Northeast expected June 9-11
• Central and east India (Delhi, Punjab, Haryana, UP, Rajasthan, MP, Bihar, Jharkhand) to see thunderstorms, lightning and gusty winds of 40-50 kmph, reaching 70 kmph in places
• Favourable conditions for advance over the Arabian Sea, peninsular, central and eastern India in coming days

🎯 UPSC Relevance: GS1 Geography (Indian monsoon mechanism, onset/advance, climatology); links to agriculture and water security

📝 Prelims Facts:

• Monsoon onset over Kerala: June 4, 2026; expected at Mumbai by June 10-15
• IMD = India Meteorological Department (under Ministry of Earth Sciences)
• Southwest (summer) monsoon advances south-to-north along the Arabian Sea and Bay of Bengal branches

🔑 Key Term: Monsoon onset/advance — the progressive northward spread of the Southwest Monsoon across India, officially declared by the IMD based on rainfall, wind and OLR criteria.