A low-pressure area formed over the southwest Bay of Bengal off the Tamil Nadu coast at 5.30 a.m. on Wednesday, the India Meteorological Department (IMD) said.
Tirupati district received heavy rain in the 24 hours ending 8.30 a.m. on Wednesday. The Meteorological Centre in Amaravati recorded 109.8 mm at Tada, 85.4 mm at Satyavedu and 76.4 mm at Tirupati Aero.
The district’s average rainfall for the period was 49.5 mm, more than eight times the normal for the day.
The Amaravati centre released the figures for Tirupati district as the rain continued in the region.
A fresh low-pressure area is likely to form over the southeast and adjoining east-central Bay of Bengal on October 23, raising the possibility of heavy rainfall in parts of north-coastal Andhra Pradesh and neighbouring Odisha in the coming days.
Residents in Tirupati and surrounding areas were affected by the downpour as several stations logged high totals in a single day.
The IMD had announced the formation of the current system off the Tamil Nadu coast earlier on Wednesday.
Tada led the district tally with nearly 110 mm in the 24-hour window, while Satyavedu and Tirupati Aero also crossed 75 mm, the Amaravati Meteorological Centre said in its station-wise breakdown.
The spike in Tirupati’s district average compared with the day’s normal figure reflected how concentrated the rain was across the southern parts of the district during the same period.
Officials at the Amaravati centre issued the rainfall data after compiling readings from multiple observation points in Tirupati district through the morning of Wednesday.
The system that formed at 5.30 a.m. sat over the southwest Bay of Bengal, close to the Tamil Nadu shoreline, before the heavy totals began showing up at ground stations in Andhra Pradesh.
Forecasters pointed to October 23 as the next date to watch, when a new low-pressure area could take shape over the southeast and east-central Bay of Bengal and influence weather along the north Andhra coast and into Odisha.
