during june 19, an eastward propagation of the madden-julian oscillation over the maritime continent, lead to the season's first area of low pressure developing over coastal parts of bangladesh. this helped the monsoon set in over india's north-eastern states and advance in to central india. during the final week of june the monsoon weakened, which led to the emergence of heatwave conditions over eastern parts of coastal india. the monsoon subsequently started to revive as it interacted with the mid-latitude westerlies and it advanced into parts of the himalayas and northwest india by july 1. during the first week of july an area of low pressure and several upper air cyclonic circulations caused the monsoon to advance further, where it covered the whole of haryana, madhya pradesh, punjab and uttar pradesh by july 7. over the next two weeks a trough of low pressure and a cyclonic circulation, helped advance the monsoon into remaining parts of the arabian sea, central and north-western india. the india meteorological department (imd) subsequently declared that the monsoon covered the whole of india on july 17, which was about two days later that normal.