During the earlier days of August, the entire eastern India was heavily rain-deficient. Moreover, the state of Bihar saw the deficiency mounting to a whopping 47 percent as on August 1.
However, as Weak Monsoon conditions started to appear, these conditions took the trough to the foothills benefitting the state. Courtesy of this position, Bihar has recovered quite a bit and as of August 27, the deficiency has reduced from 47 to 24 percent.
Rains have been heavy around the foothills. Forbesganj sees normal rains of 339.9 mm in the month of August. But the region saw three digit rains for six straight days taking the rain total for those days to 823 mm in 6 days. The total rains until now exceeded 1000 mm which is three times normal rains.
Similar rains have been seen along foothills including Supaul, Motihari etc. In fact, the plains also saw good rains.
However, in the last 24 hours, there have hardly been any rains. Cyclonic circulation is to appear in the Bay of Bengal, due to which wind pattern has changed. Not much rain is expected now. However, the northward position of the trough cannot be ruled out which is why light to moderate showers are likely.