The pre monsoon rainfall received in the State from 1st March 2013 to 31st May 2013 was normal with a departure of -42 per cent from the normal. The actual rainfall received during the period was 218.9 mm. All the Districts except Kottayam and Wayanad recorded deficient rainfall. The percentage departure from normal was highest in Palakkad (-56per cent), Malappuram( -56 per cent) and Thrissur ( -56 per cent ) Districts.
South West monsoon current advanced over the Andaman Sea 3 days earlier than its normal date of 20th May and set in over Kerala on its normal date of 1st June. The South West monsoon covered the entire country by 16th June, about 1 month earlier than its normal date of 15th July. Out of the total 36 meteorological subdivisions, 14 subdivisions constituting 48 per cent of the total area of the country received excess season rainfall, 16 subdivisions (38 per cent of the total area of the country) received normal season rainfall and the remaining 6 subdivisions (14 per cent of the total area of the country) received deficient season rainfall.Out of the total of 641 districts, 100 were affected by moderate meteorological drought (seasonal rainfall deficiency of 26 per cent to 50 per cent), while 39 were affected by severe meteorological drought (seasonal rainfall deficiency of 51 per cent to 99 per cent).
The actual rainfall received in Kerala during the South West Monsoon season (1st June to 30th September 2013) was 2570.3 mm as against the normal rainfall of 2039.6 mm which was 26 per cent excess. During the previous SW monsoon (2012) Kerala had received an actual rainfall of 1551.3 mm which was -24 per cent deficient. During 2013 SW monsoon season, 10 districts in the State received excess rainfall and 4 districts viz. Wayanad, Thrissur, Pathanamthitta and Kasaragod had normal rainfall. Excess rainfall was maximum in Idukki District with 47 per cent departure from normal.
Source: Economic Review 2013
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