20th June...Not a Usual Scenario 

Monsoon Trough (Dynamic Low) gets established for the first time this monsoon season: 

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The Monsoon Trough or the Dynamic low is getting established for the first time this monsoon season over the Indo Gangetic Plains. The mechanism is an indication of the arrival of moist monsoonal air mass and related physical processes over the northern boundary of the Indian subcontinent. With this, the advancing phase of summer monsoon rains is nearing completion. The latest update from IMD indicates that the monsoon isochrone has covered most parts of Uttar Pradesh and parts of north western Himalayas in the past 24 hours. Satellite observations indicate formation of persistent low to mid level cloud layers on a large scale to the south of the Monsoon Trough axis. Rainfall observations over the core monsoon zone show that the region has been experiencing huge positive rainfall anomalies in the past 4-5 days with area averaged rainfall being close to + 2 standard deviations. Meanwhile, NWP model forecasts continue to indicate an early advance of Monsoon over the north western regions of the Sub Continent. 

Analysis and Report of Latest Scenario by Vagarian Gokul.