India, July 14 -- Despite almost a fortnight elapsing since the onset of monsoon in Delhi, two of the Capital's three Doppler weather radars (DWRs), used to track clouds and predict rain, are not functional, officials aware of the matter said.

Delhi has three DWRs, at Palam, Lodhi Road, and Ayanagar, which have ranges of 400km, 250km, and 100km, respectively. The DWRs at Lodhi Road and Ayanagar have both been out of operation for over a month now, making forecasts reliant on the remaining radar at Palam.

The India Meteorological Department (IMD) attributed this to routine maintenance, but added that the Doppler at Ayanagar is likely to be made operational soon.

A DWR sends radio waves from its antenna, which hit clouds and bounce back,...