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With the commissioning of High Performance Computing System (HPCS) in December 2009, National Centre for Environmental Prediction (NCEP) based Global Forecast System (GFS T574/L64) has been made operation at the H/Q of IMD, incorporating Global Statistical Interpolation (GSI) scheme as the global data assimilation for the forecast up to 7 days.
Currently, it runs twice in a day (00 UTC and 12 UTC). In addition to this, the meso-scale forecast system WRF (ARW) with 3DVAR data assimilation is being operated daily twice, at 27 km, 9 km and 3 km horizontal resolutions for the forecast up to 3 days using initial and boundary conditions from the IMD GFS-574/L64 (horizontal resolution over the tropics ~ 22 km).. At ten other regional centres, very high resolution mesoscale models (WRF at 3 km resolution) are made operational. NWP based objective forecast products are prepared to support cyclone warning service. Doppler weather and mesoscale dynamical model based nowcast system was made operational for the national Capital of Delhi. Polar WRF is implemented to provide day to day short range (48 hours) weather forecast for the Maitri region over Antarctica. District Level Quantitative five days weather forecasts based on Multi-Model Ensemble (MME) system are being generated to support Agro-Meteorological Advisory Service of India, making use of model outputs of state of the art global models from the leading global NWP centres. More....
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