In its official press note, the weather department said the expected rain activity is being triggered by a lower atmospheric circulation prevailing over southern India.
As a result, it oscillated under the opposing wind patterns, making it nearly stationary, according to B. Amudha, Director, Regional Meteorological Centre (RMC), Chennai.
Under its influence, the Tirupati and Nellore districts would receive heavy rains accompanied by squally winds up to 60 kmph, before the deep depression is likely to fizzle out gradually on Tuesday.
