Many parts of Delhi received moderate rainfall in the past 24 hours. However, the showers were patchy, varying in intensity and spread. Some pockets remained dry, as well. The base observatory at Safdarjung recorded 37mm rainfall and Meteorological Office Lodhi Road registered 20mm. Some other locations like Pragati Maidan and Salwan measured 25-45mm rainfall. Bulandshahr, on the outskirts of Noida, received a deluge of 83mm rainfall. More showers are likely today and tomorrow. The extent and scale of activity may be reduced next week.
The official record observatory for Delhi, Safdarjung has totaled 71mm rainfall in the first six days of the month. It has crossed the halfway mark for the September normal of 123.5mm. Last year, despite the late withdrawal of the monsoon, the monthly rainfall was just 83mm, well short of the September average. Decent showers are expected today and becoming a little subdued tomorrow and reducing to just a patchy sprinkle, on Sunday. Next week, the monsoon activity is expected to be low-key.
There is a cyclonic circulation marked over Northeast Rajasthan and adjoining region. This has triggered the oscillation of the monsoon trough, bringing it a little closer to Delhi. Also, a fair amount of moisture is getting pumped with a strong easterly flow of winds in the lower levels of the atmosphere. The western disturbance is still moving across the northern hills. Put together, conditions are favourable for scattered moderate rain and showers over and around the national capital, today.
The cyclonic circulation over Rajasthan will be shifting to Southeast Rajasthan and neighbouring Madhya Pradesh region, tomorrow. This will pull the monsoon trough southward, above the friction level of 3,000 – 5,000 feet. This level is a better indicator of weather activity associated with the monsoon trough. Due to this shift, the monsoon showers will become light and patchy. Though the clouds will keep the comfort level intact, the rains will become scanty. This position of the monsoon trough will be retained for about 48-72 hours. Later, the western end of the trough will become less marked and may even get pushed, closer to the foothills of Uttarakhand and West Uttar Pradesh. Lean weather activity is likely to prevail over Delhi/NCR, the next week.
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