On the expected lines, the capital city has been observing patchy and light rainfall for the last 2-3 days. Yesterday, the base observatory recorded 4 mm rainfall and the airport observatory Palam remained dry. Some pockets in the NCR also observed fleeting showers for short duration. A similar trend will continue during the weekend. Hefty rains of long durations are unlikely.
The monsoon trough is running north of Delhi at the surface level. For weather activity, what matters most is the position of the trough above the friction level of 3,000 feet. The trough is likely to oscillate during the next 24-36 hours and thereafter, shift south of Delhi. The swing of the trough will lead to patchy rainfall across Delhi/NCR.
There is a feeble westerly system moving across the northern mountains. This feature has helped the trough, tracking slightly north of Delhi. The low-level winds have remained westerly. These relatively dry winds have raised the day temperature and the record observatory at Safdarjung measured day temperature in excess of 36°C, for the second consecutive day. While the oscillation of the trough will trigger passing intense showers, the change in the wind pattern will drop the mercury levels. The day and night temperatures are likely to hover around 33-34°C and 25-26°C, respectively.
Image Courtesy: WION