Visakhapatnam: A low pressure area was formed over north-west and adjoining west-central Bay of Bengal off south Odisha-north AP coasts on Tuesday.
The system is an associated cyclonic circulation extending upto 7.6 km above mean sea level tilting south-westwards with height. It is likely to move nearly westwards across south Odisha and south Chhattisgarh during the next 24 hours, the weather office said.
“The western end of Monsoon trough runs along the foothills of the Himalayas and its eastern end now passes through Najibabad, Lucknow, Satna, Raipur and thence south-eastwards to the centre of low pressure area over north-west and adjoining west-central Bay of Bengal off south Odisha-north AP coasts.”
“A trough from the cyclonic circulation associated with the low pressure area to Telangana across north coastal AP between 1.5 km and 3.1 km above mean sea level has become less marked.”
Under the influence of low pressure in the Bay of Bengal, the cyclone warning centre at Visakhapatnam forecast heavy to very heavy rainfall in AP for three days from Tuesday.
IMD issued an Orange alert for Nandyal, YSR Kadapa, Kurnool, Anantapur, Sathya Sai and Annamayya districts in Rayalaseema.
In Coastal Andhra, several districts including Srikakulam, Parvathipuram Manyam, Vizianagaram, Visakhapatnam, Alluri Sitaramaraju, Anakapalli, Kakinada, East Godavari, Eluru, Konaseema, West Godavari, NTR, Guntur, Krishna, Palnadu, Bapatla and Prakasam have been put under an Orange alert.
A Yellow alert was issued for Tirupati and Nellore districts.
The Visakha cyclone warning centre has warned of a possibility of thunderstorms in some places in the coastal Rayalaseema districts.
Thunderstorms accompanied by lightning are likely in isolated places. Strong winds with speeds reaching 30-40 kmph are likely on Wednesday and Thursday. Gusty winds of 45 to 55 km per hour were expected along the south coast.
Fishermen were advised not to venture into the sea for the next four days following the surface circulation in the Bay of Bengal. In some places, possibility of thunder and lightning rain is predicted. Since Monday, Vizianagaram has recorded the highest rainfall of 9 cm.
