The southwest monsoon is seen decreasing in south India over the next seven days, the India Meteorological Department (IMD) said on Friday. Having hit the Kerala coast two days before the scheduled date on 30 May, the monsoon has been lashing the southern region since then causing two major landslides in Kerala’s Wayanad on 30 July.
So far, the region has recorded 24% surplus precipitation since the beginning of the four-month (June-September) monsoon season. Similarly, central India received 18% above normal rain during the same period. However, east & northeast and north-west regions witnessed deficiencies of 11% and 5%, respectively. Overall, the country recorded 7% higher rainfall than normal since 1 June.
“Subdued rainfall activity likely over most parts of Peninsular India during next 7 days,” IMD said. “Widespread light to moderate rainfall over Tamil Nadu, Puducherry & Karaikal, Kerala & Mahe, Lakshadweep, Karnataka and isolated to scattered rainfall over Coastal Andhra Pradesh & Yanam, Telangana and Rayalaseema during the week is likely,” it elaborated.
Meanwhile, Delhi for a change has been breathing its cleanest air this year. Between 1 January and 8 August, Delhi experienced its cleanest air quality in six years, according to the Centre’s Commission for Air Quality Management (CAQM).
In a post on X, CAQM said that AQI (air quality index) of 53, recorded at 4 pm as per the Central Pollution Control Board, marks the cleanest air quality for any day from January 1 to August 8 over the period from 2018 to 2024.
As per the Central Pollution Control Board, the AQI in the national capital as of 4 pm on Friday was 60, which is categorised as satisfactory. The improvement in air quality coincides with recent heavy rainfall in Delhi during this monsoon season, especially this month.
AQI readings are classified as follows: 0-50 is good, 51-100 is satisfactory, 101-200 is moderate, 201-300 is poor, 301-400 is very poor, and 401-500 is severe.
On the rain forecast in northwest India including Delhi, it said that light or moderate rainfall is likely over Himachal Pradesh, Uttarakhand & East Rajasthan; scattered to widespread rainfall over Jammu, Kashmir, Uttar Pradesh, Punjab, Haryana, Chandigarh, Delhi and West Rajasthan during the next seven days.
This is due to active monsoon and as two cyclonic circulations lie over northeast Rajasthan & neighbourhood and southeast Uttar Pradesh & neighbourhood.
The Southwest monsoon has been wreaking havoc in most of the country since it regained momentum towards the end of June, resulting in Delhi's highest single-day June rainfall in 88 years. Mumbai witnessed similar conditions. Wayanad in Kerala had two major landslides, pushing its death toll to more than 400.
In August, monsoon rains are expected to be normal at 94-106% of the long-period average, IMD said earlier this month.
This is due to the El Niño–Southern Oscillation (ENSO) having returned to neutral, and the cooler phase, known as La Niña, is expected to form in the second half of the monsoon season (August-September).
La Niña is characterized by the cooling of sea surface temperatures, and occurs every 3-5 years, occasionally in consecutive years, leading to increased rainfall and distinct weather patterns, which can result in floods.
