The further advance of southwest monsoon into remaining parts of Rajasthan, west Uttar Pradesh, Haryana, Chandigarh & Delhi and Punjab is likely to be slow as large scale features are not favourable and the forecast wind pattern by the numerical models do not indicate any favourable condition for sustained rainfall over the region during the forecast period, the India Meteorological Department (IMD) said on Monday.
♦ Further advance of SW monsoon into remaining parts of Rajasthan, west UP, Haryana, Chandigarh & Delhi and Punjab to be slow as large scale features and the forecast wind pattern by the NWP do not indicate any favorable condition for rain over the region during the period.
— India Meteorological Department (@Indiametdept) June 21, 2021
Under the influence of strengthening of moist southwesterly winds, fairly widespread to widespread rainfall with isolated heavy rainfall very likely over Assam, Meghalaya, Tripura, Mizoram and West Bengal & Sikkim during next 5 days.
The northern limit of the southwest monsoon (NLM) continues to pass through Lat. 26°N / Long. 70°E, Barmer, Bhilwara, Dholpur, Aligarh, Meerut, Ambala and Amritsar.
Under the influence of a cyclonic circulation over northwest Bihar & adjoining east Uttar Pradesh and a trough from northwest Rajasthan to the northeast Bay of Bengal at mean sea level, fairly widespread rainfall with isolated heavy rainfall very likely over Bihar during the next 48 hours.