Meteorological conditions of the last week (13 to 19 August)
• The axis of the monsoon trough at mean sea level (m.s.l.) ran close to its normal position till 17 August and moved northward thereafter.
• An upper air cyclonic circulation lay over east Uttar Pradesh and neighbourhood on 13 & 14 August, over west Uttar Pradesh during 15-19 August and became less marked thereafter.
• Another upper air cyclonic circulation developed over north Orissa and neighbourhood on 14 August, lay over north Chhattisgarh and neighbourhood on 15 and 16 August and became less marked on 17 August.
• A cyclonic circulation was seen off north Tamil Nadu and south Andhra Pradesh coast extending upto mid-tropospheric level on 14 August. It moved gradually westwards and lay over north Kerala and adjoining Arabian Sea on 19 August.
• The off-shore trough along the west coast was either absent or very weak throughout the week. Rainfall during the week (13 to 19 August)
• Under the above scenario, there has been significant improvement in monsoon activity compared to last week over northwest, south Peninsula and northeast India.
• There was Excess rainfall over Gangetic plains, foothills of the Himalayas, Assam. Meghalaya, Arunachal Pradesh and south peninsula excluding west coast.
• Subdued rainfall activity continued over central India. The rainfall was even scanty over Maharashtra, Gujarat and West Rajasthan.
• The weekly rainfall summary during past two weeks is given in Table 1 for comparison. The sub-divisionwise cumulative seasonal rainfall distribution as on 19 August
2009 is shown in Fig.2. Out of 36 meteorological sub-divisions, the cumulative
seasonal rainfall was excess in 1, normal in 09, deficient in 25 and scanty in 1
(Haryana, Chandigarh & Delhi) sub-divisions. Considering district-wise rainfall during
the period of 1 June to 19 August 2009, the rainfall was excess in 8%, normal in
27%, deficient in 52% and scanty in 13% of total districts of the country.
Meteorological conditions for the next week