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Doppler radar glitch affecting accurate weather forecast
Doppler radar glitch affecting accurate weather forecast. The Doppler Weather Radar (DWR) system, which is meant for predicting weather in Telangana State, has been lying defunct due to technical glitch for the last nine months.
Hyderabad: The Doppler Weather Radar (DWR) system, which is meant for predicting weather in Telangana State, has been lying defunct due to technical glitch for the last nine months. The Indian Meteorological Department (IMD), Hyderabad centre, has informed its head office in Delhi but no action has been taken so far to rectify the problem.
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With no alternative, the IMD officials at the Hyderabad centre are relying on inputs from IMD centres in Machilipatnam, Visakhapatnam and Chennai to arrive at forecast in ten district of Telangana. With this technical handicap, it is very difficult to provide thunderstorm warnings and hailstorm warnings.
“Importing radar component from China will take another six months. The IMD is trying to organise the component from the Delhi radar temporarily,” said IMD Director Y K Reddy. Interestingly, the IMD has been waiting for 10 months for a component that would cost about Rs 2 lakh only.
Explaining to The Hans India, Y K Reddy said that the radar system provides information about conditions such as upper air weather in 250 km radius. The radar transmits crucial data like cloud density, amount of rainfall, thunderstorm, windstorm, formation and location of a system, disturbance caused by cloud and rainfall to the ground unit.
The centre would analyse the data before forwarding the processed weather information to the government. The radar system gives cloud formation and rainfall forecast with precision. The Doppler system, which was installed in 2010, has a glitch with its key component “wave guide rotary joint” since November 2104.
After its rectification, “safety circuit receiver” had encountered a problem that was repaired in July this year, said Y K Reddy. As a result of this, the IMD centre was unable to give “now-cast” report to Hyderabad, Medak, Nalgonda, Adilabad, Karimnagar Khammam, Mahbubnagar, Nizamabad, Warangal of Telangana State and Kurnool in Andhra Pradesh.
At present, the IMD is relying on satellite imagery, weather models and upper air measurement to provide the forecast. The IMD can forecast with 60 percent accuracy while with the Doppler radar it could be as accurate as 90 percent, the IMD Director said. “The absence of radar would be a major disadvantage to the newly- formed state,” he said. The IMD can only provide a 24-hour forecast report to all districts in Telangana but not now-cast report,” he said.
