This year monsoon covered almost 80% area of the country well before time. The low-pressure area which formed over the north Bay of Bengal was instrumental in pushing the monsoon currents up to East Uttar Pradesh. Similarly, the monsoon surge over the west coast of the country also became active due to the pull of this low-pressure area. And monsoon reached South Gujarat before time.
As of June 25th, most of the eastern states in the country are a large rain surplus. East Uttar Pradesh is surplus by 167%, Bihar is surplus by 136%, Jharkhand 73%, and West Bengal is surplus why 29%. Odisha recorded a very heavy downpour in the third week of June but since then rainfall has decreased over the state and it is surplus by just 1%.
A low-pressure area or cyclonic circulation is persisting over Eastern parts of the country for the last 10 to 15 days. Moreover, the mean sea level trough is also passing through east Uttar Pradesh, Bihar, Jharkhand and West Bengal. Moderate showers with few heavy spells are expected to continue over east Uttar Pradesh, Bihar, and West Bengal as well as parts of Jharkhand and Odisha during the remaining days of June. However, the overall rain surplus of the country will keep on decreasing until the first week of July. But east India will remain one of the rainiest metrological divisions until then.
We do not expect the monsoon to progress further until July 6 or 7. Therefore, north-West India including Delhi which will continue with hot and humid weather.
