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Chengalpattu district in Tamil Nadu received the heaviest of rainfall during the 24 hours ending on Sunday morning even as rain and thunderstorms targeted Chennai and adjoining Coastal Andhra Pradesh on Sunday with the North-East monsoon entering an aggressive new phase over the South Peninsula.
The Regional Meteorological Centre in Chennai said that rainfall occurred at a few places over Tamil Nadu while it was isolated over Kerala, Coastal Andhra Pradesh, Rayalaseema and Telangana during this period. Light rain occurred over Puducherry while it was dry over Lakshadweep and Karnataka.
Second easterly trough
The heaviest rainfall in Tamil Nadu (above 5 cm) was reported from Kelambakkam-9 followed by Hindustan University (both in Chengalpattu) -7 each; Sethiyathope and Parangipettai (Cuddalore) and Chengalpattu-5 each. In Andhra Pradesh, Thottambedu and Srikalahasti (Chittoor) recorded the highest at 4 cm each.
India Meteorological Department (IMD), Delhi, attributed the rainfall to a second easterly trough on the trot extending from the Comorin area to South-West Bay and adjoining West-Central Bay of Bengal off the Tamil Nadu and South Andhra Pradesh coast in the form of an inverted ‘U.’
Heavy rain forecast
This would trigger scattered to fairly widespread rainfall, thunderstorms, lightning and isolated heavy falls over Tamil Nadu and Puducherry until Wednesday; over Coastal Andhra Pradesh for a second day on Monday; and Kerala on Tuesday and Wednesday, the IMD said.
The IFS-HRES model from the European Centre for Medium-Term Weather Forecasts indicates the likelihood of heavy rain from Kavali (Coastal Andhra Pradesh) to Chennai during the next 10 days. A limb of the heavy rain regime may also extend to Tirupati and Chittoor in Andhra Pradesh and Sira in Karnataka.
Satellite pictures on Sunday afternoon rain clouds hanging heavily over Kavali, Nellore, Chennai, Cuddalore, Tiruvannamalai, Kolar Gold Fields, Ramanagara, Punganuru, Bengaluru, Salem, Dindigul and Nagercoil across Coastal Andhra Pradesh, Tamil Nadu, and Karnataka.
Western disturbance on way in
To the North-West of the country, an active western disturbance brought isolated heavy rain/snow over the Kashmir division on Saturday. On Sunday, it was located as a cyclonic circulation over Afghanistan with an offspring circulation over South Pakistan, which elevated it to an ‘active’ category.
Fairly widespread to widespread rainfall accompanied with thunderstorm, hailstorm and lightning were forecast for the hills and isolated heavy falls were forecast on for Jammu & Kashmir and Himachal Pradesh. These would decrease significantly by Monday.
Scattered to fairly widespread precipitation accompanied with thunderstorm, hailstorm and lightning were the forecast for the plains in Punjab, Haryana, Chandigarh, Delhi, West Uttar Pradesh, North Rajasthan, North-West Madhya Pradesh.
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