This year’s rainfall in the capital hardly reflects the condition in the rest of the state but weathermen are banking on the tail of the monsoon to cancel out the deficit.
Patna has improved on its deficient rainfall count for June from 27 per cent in 2013 to 16 per cent in 2014, while that for the state has surged from 12 per cent to 32 per cent.
The rainfall deficiency has hit the capital for the third consecutive year though it experienced eight rainy days this monsoon between June 1 and 30 (see graphic), the third highest number of wet days in June in the past seven years.
The cumulative monsoon rainfall figure for the city in June stood at 106mm, which is nearly 20 per cent higher than the rainfall received in the corresponding period in 2013 and four times the rainfall received during June 2012. However, the rainfall deficiency for the entire state in June surged from 12 per cent in 2013 to 32 per cent this year.
Meteorologists have attributed the deficient rainfall across the state to the complete absence of pre-monsoon showers in June this year. Except for trace rainfall (less than 1mm) on June 15 and 16, there was no precipitation in Patna and most parts of the state till the onset of southwest monsoon on June 18. The monsoon arrived in the state at a delay of seven days and the sixth consecutive year it was delayed.
Deliberating on the significance of pre-monsoon rainfall in June, Ashish Sen, director at Patna Meteorological Centre, said: “Pre-monsoon thunderstorms make the major contribution to June rainfall. Its significance can be gauged by looking at the rainfall in June, 2009. Despite the monsoon entering the state on June 29 in 2009, the total rainfall was 90.6mm, which was only because of high pre-monsoon activities. However, the absence of the same this year was the biggest factor that brought down the cumulative rainfall figure for June.”
The deficiency, however, the weathermen claimed, could be covered up in the later stages, as eastern parts of the country receive the tail of southwest monsoon. “The country’s eastern parts have the possibility to make up for deficient rainfall in case monsoon revives in the latter half of the season. Besides, the eastern region has prospects of receiving better rainfall compared to the rest of the country this year,” said Sen.
The weather was very hot and humid in June because of the absence of pre-monsoon showers coupled with the delayed onset of rains. This could be gauged from the fact that the 24-hour highest maximum temperature in June last year stood at 38.4ºC on June 12, while the same was recorded at 42.4ºC on June 13 this year.
Rain till Friday
Patna and many other parts of the state received moderate to heavy rainfall on Monday night and overcast conditions prevailed on Tuesday. The Met office has predicted thunderstorms with rain across the state till Friday.
The monsoon trough line was passing through Rajasthan, Haryana, Delhi, Uttar Pradesh, Bihar and Gangetic Bengal up to the Bay of Bengal on Tuesday. Met chief Sen claimed that such position of trough line is favourable for monsoon rainfall in Bihar.
“Bihar is receiving widespread rainfall during, perhaps the first active monsoon phase in the region, this year. This is primarily because of the cyclonic circulation that formed over the Bay of Bengal last week coupled with the favourable position of the trough line. Most parts of the state, especially the northern districts, would continue to receive moderate to heavy rainfall till Friday,” said Sen.
The Met chief added that this active phase of monsoon would help the cumulative shortfall in rainfall make a swift recovery over the next few days. The cumulative rainfall deficiency in case of Patna came down from 16 per cent as on Monday to 12 per cent on Tuesday. The same for Bihar also dropped by 1 per cent and stood at 31 per cent on Tuesday.