India has seen rather heavy rainfall in October and November 2021, with October All India Rainfall being 33% above normal and November rainfall being record breaking 86% above normal. The combined Oct + Nov Rainfall was 48% above normal, and by Dec 7, as we write this, it is already 53% above normal for the period from Oct 1 to Dec 7, 2021.
While lingering South West Monsoon brought large part of the excess rainfall in first half of October, the unusually active North East Monsoon with continuous supply of moisture from Bay of Bengal has been the main reason for the high rainfall since late October. The onset of La Nina has also contributed to this and with La Nina forecast to remain in place till March 2022, we are in for continued wet spell in South India, it seems. IMD has already forecast above normal rainfall in South Karnataka during Dec 2021 to Feb 2022.
Continue reading “Heavy Rainfall in India in Oct-Nov 2021”
In a development described as unprecedented, by 1030 hours on Friday, Oct 29, 2021, the waters of Kameng River in Arunachal Pradesh in North East India suddenly became dark with large amount of silt and debris and thousands of dead fish floating on the surface. A video on twitter by 1300 hours[i] showed the dark Kameng waters. (The Feature image above is from twitter post by The Arunachal Pradesh on Oct 31, 2021)
Continue reading “Muddy Kameng River waters & mass fish death in Oct 2021”
Uttarakhand has seen unusual rainfall episode in the month of October 2021. The extreme rains during October 17 to 19 across the state and particularly at several places in districts under Kumaon division have been termed as highest rainfall in the recorded history as per Meteorological Circle (MC), Dehradun. This account is an attempt to document the historical rainfall events caused by combination of low pressure and western disturbance (WD) weather phenomena.
Continue reading “Unprecedented October 2021 Rainfall in Uttarakhand”
The October 2021 flood disasters in two ends of India, in Kerala and Uttarakhand have a lot common. Both happened after the end of normal dates of South West Monsoon 2021. In both cases it is repeat of earlier such disasters in respective states. In both cases, there were reports by expert reports warning about the disasters. In both cases the rainfall events were broadly along the lines warned by the climate scientists, but in both cases the state was ill prepared to cope with it. In both cases, inappropriate human interventions have worsened the disasters in major ways. And in both cases disaster management seems to be absent from ground. In both cases, more precise forecasts about the rainfall quantum and location would have helped. (Feature Image above is from The Hindustan Times, Oct 23, 2021)
Continue reading “Kerala and Uttarakhand floods in Oct 2021: Did the forewarnings help?”