Monsoon 2018 made an early onset over India on May 28, resulting in some good rains during the first half of June. The country saw moderate to heavy rains, with countrywide cumulative rainfall being surplus by 19% on June 13.
During this time, Monsoon advanced at a steady pace. In fact, Monsoon covered several places before time, even reaching Mumbai a day earlier on June 9.
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However, Monsoon current became week, resulting in significant drop in rainfall across the country. As a result, the surplus rains dropped and became deficit by the third week of June. As on June 25, countrywide cumulative rainfall was deficit by 12%.
During this, progress of Monsoon was really sluggish and there was hardly any movement for about 10 days. Though waxing and waning of Monsoon rains is normal procedure but time the break was little longer.
Nonetheless, Monsoon surge again picked up pace by June 23, wherein several parts of the country, particularly Mumbai saw moderate to heavy rainfall. Few, extremely heavy rainfall spells were also recorded. As a result, Arabian Sea branch of Monsoon progressed further into Gujarat, while the Bay of Bengal branch of Monsoon entered Bihar and Uttar Pradesh. It was delayed arrival over all these areas almost by 10 days.
Since then, Monsoon has been making rapid progress. In fact, we can say that this is the biggest leap the Monsoon has taken this season. Monsoon has been progressed further consecutively for the four days from June 24 to June 28.
Monsoon 2018 has now covered the entire country way ahead of its official date of July 15.
According to Skymet Weather, there are certain that need to be fulfilled before the advancement of monsoon is declared. Following are the few criteria:
- Rain bearing clouds should be there, giving at least light rain over the specific area
- Significant drop in temperature
- Wind pattern should also change, and existing winds should be replaced with easterlies
- Moisture laden winds should reach the given area which would lead to significant jump in levels of humidity
For the last few days, all these criteria were being witnessed over most parts of northwestern plains. This change in weather conditions can be attributed to the cyclonic circulation which was responsible for bringing Monsoon over Uttar Pradesh. The system is now seen over south-east Rajasthan and adjoining West Madhya Pradesh. In fact, it later on shifted further towards central and southern part of Rajasthan.
Besides this, there is a western disturbance over Jammu and Kashmir which will keep the circulation more marked, leading to further enhancement over rain activity.
Both the systems have already given widespread rain and thundershowers across Punjab, Haryana, Delhi-NCR, Rajasthan, and Uttarakhand. Progressing at the similar pace, Monsoon has covered the remaining parts of the country on June 29.
In fact, weather conditions are conducive for Monsoon rainfall of varying intensity across most parts of the country during the next 48 hours.
Image Credit:en.wikipedia.org
Any information taken from here should be credited to skymetweather.com
