PATNA: Following widespread rainfall during the last fortnight, especially in the northern parts of the state, the southwest monsoon has become weak over Bihar and is likely to remain so throughout this week.
According to weathermen, Bihar is unlikely to witness any widespread rainfall activity this week. However, light rain may occur in an isolated manner in the state. The daily afternoon weather bulletin issued by the Patna Meteorological Centre on Monday stated that southwest monsoon was weak over Bihar.
Meanwhile, Patna and several other places in north Bihar witnessed light showers on Monday. For instance, Bahadurganj in Katihar, Chakia in West Champaran and Sheohar received 40mm rainfall each, Bairgania in Sitamarhi and Kamtual in Darbhanga received 30mm rain each, Madhopur in Siwan, Madhepura and Basua in Muzaffarpur and Hathwa in Gopalganj received 20mm rainfall each.
Earlier, many places, especially those close to Nepal border, witnessed heavy rainfall over the past couple of days as monsoon trough line was positioned in the region. However, weathermen on Monday claimed that the trough line had shifted close to the foothills of the Himalayas.
The trough line is an elongated low-pressure area which stretches from west to east and monsoon rainfall normally hinges along it.
Deliberating on the expected weather conditions this week, Patna Meteorological Centre director S Sengupta told TOI, “The monsoon trough line has shifted close to the foothills of the Himalayas. Accordingly, we expect only light rainfall in the state, that too in an isolated manner over the next five days.”
The Met office has also not issued any warning for any of the six meteorological regions in the state — northwest (West Champaran, Siwan, Saran, East Champaran, Gopalganj, Chhapra), north-central (Sitamarhi, Madhubani, Muzaffarpur, Darbhanga, Vaishali, Shivhar, Samastipur), northeast (Supaul, Araria, Madhepura, Kishanganj, Saharsa, Purnia), southwest (Buxar, Bhojpur, Rohtas, Bhabhua, Aurangabad, Jehanabad), south-central (Patna, Gaya, Nalanda, Sheikhpura, Begusarai, Lakhisarai, Nawada) and southeast (Katihar, Bhagalpur, Banka, Munger, Khagaria, Jamui).
At present, the overall monsoon rainfall scenario in Bihar stands at 2% surplus. As per figures available on the official website of the IMD, five of the 38 districts received excess rainfall as on September 3 and 28 districts received normal rain.
Rainfall status in districts
District Actual (mm) Normal (mm) Departure (%)
West Champaran 1562.4 1053.6 48
Darbhanga 991.2 758.1 31
Kishanganj 1824.6 1446.3 26
Rohtas 804.6 668.3 20
Bhojpur 454.0 740.2 -39
Siwan 516.2 778.4 -34
Munger 526.0 765.4 -31
Patna 587.3 739.4 -21
BIHAR 841.0 824.6 2
(Figures for period between June 1 and Sept 3)