When we talk about weak monsoons, let us first compare this year's figures with some of the other weak monsoon deficit years.
2009 saw the lowest rainfall (all India) in several decades. End of July in 2009 was at an unbelievable deficit of -47 %. It ended up with an end of season deficit of -28%.
For an on date comparison of 2009, see Vagaries' Blog of this date here
On this page, Please move on to 16th July (2009) write up.
Check the rainfall figures for Gujarat on this date...havn't seen such figures in years..
1972 was also a drought year with the season's deficit at -24%. End July was at -31% in 1972.
The worst ever for drought ever in India was in 1877 when the monsoon deficit was at an ashtonishing -29%.
Current Weather:
Last few days, TN, AP and parts of Interior Karnataka got the much needed precipitation. As Venkatesh points out, it has reduced the deficit in the region and provided the much needed moisture in the interiors.
In TN, heavy rainfall was recorded in Alangayam (dist Vellore) 11, Paiyur AWS (dist Krishnagiri) 9 and Vaniaymbadi (dist Vellore) 9, besides many station between 3-9 cms. With some rains, Chennai AP has crossed the 100 mms mark and is at 109 mms.
In AP, Chittoor (dist Chittoor) 13, Rajahmundry (East Godavari dt) 11, Avanigadda (Krishna dt) 10, Palamner (dist Chittoor) 10, Shriramsag.pocha (dist Nizamabad) 7 and several other stations below 7 cms.
Though Karnataka interiors did not recieve such heavy rains, at Bangarpet (Kolar dt) 8, Karwar 7, Manki (Uttara Kannada dt) and Hoskote (Bangalore rural dt) 6 each. A begining has been made with rains between 1-3 cms. Bangalore city got some rains, managing 12 mms, pushing up the season's total to 27 mms.
An off shore trough extends along the Eastern Coast of india, from the "low" over the NE States (the East end of the Monsoon Axis)crossing the coast into Interior TN. The trough encouraged and aided the formation of Thunderclouds in the Interiors of the Southern States due to drop in pressures at various levels.
The susequent rainfall along the trough was not predicted by any model, and formed as a result of the Eastern end of the Monsoon axis getting strong.
For More on the Outlook and City forecast see Vagaries.
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