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HeKx k k fko k Sl fk je H r ok uINDIA METEOROLOGICAL DEPARTMENT (IMD)(In the Service of Nation Since 1875)

Ministry of Earth Sciences (MoES) Government of India New Delhi

India Meteorological Department (IMD) was established in 1875. It is the National Meteorological Service provider of the country and the principal government agency in all matters relating to meteorology, seismology and allied disciplines and provides weather and climate services to different sectors.

IMD's Recent Initiatives and Achievementsof its infrastructure to deliver value added services, which encompass refurbishing and enhancing its Observational capability, Forecasting techniques and Communication facilities. u Implementation of Global Forecast System (GFS) model at resolution (35 Km) at Delhi on High Performance Computing Systems (HPCS) to generate seven days forecast. u Implementation of high resolution regional model at different centres of IMD. u Operationalisation of Multi-Model Ensemble (MME) extended range forecasts. u Installation of Central Information & Processing System (CIPS) at IMD New Delhi. u Introduction of Climate Data Management System (CLISYS) at IMD Pune and IMD Delhi. u Integrated Agro-meteorological Advisory System at District level. u Introduction of Public Weather Service (PWS). u monitoring and forecasting services with dedicated monsoon page on IMD website. Monsoon u Fog monitoring and forecasting services for Palam Airport in Delhi with live RVR. u weather forecasting services for the Commonwealth Games 2010 over Delhi NCR. Special u Installation of Doppler Weather Radars at Delhi and Hyderabad. u Microzonation study of National Capital Territory, Delhi. Seismic u Introduction of GPS Radiosonde in the upper-air observations.u Modernization


India Meteorological Department

1. Weather Forecasting ServicesThe National Weather Forecasting Centre (NWFC) has been set up at Mausam Bhawan, Delhi to bring all types of forecasting services of IMD under one umbrella. It provides forecast guidance to six Regional Meteorological Centres (RMCs) and State Meteorological Centres (MCs).

Salient Features of NWFC? Real time reception and assimilation of multi

sensor observations.? software tools for various meteorology, Seamless

climatology and public weather service applications. ? An integrated and fully automated forecasting environment ? method is overlaid on numerical models Synoptic supported by modern graphical and GIS applications to produce high quality analyses & forecasts and automated dissemination of forecast and warning. ? support of NWFC at IMD, Pune in the Backup office of DDGM(Weather and Forecasting) National Weather Forecasting Centre (NWFC)

Web based Forecast Services : Weather forecast, meteorological information, warnings, normal etc. are provided through IMD Head Quarters at Delhi and various offices of IMD. v IMD Pune v IMD HQ

Regional Meteorological Centres (RMCs)http:// v IMD Mumbai v IMD Chennai v IMD Kolkata v IMD Guwahati v IMD Nagpur IMD Delhi


In the Service of Nation Since 1875

India Meteorological Department

Forecasting Cell l Monitoring of weather situation over the country l Issuance of short to medium range forecast with a outlook on extended range. l Issuance of forecast for mountain region, sports, tourism and VIP movements etc l Issuance of meteorological sub-division wise weather warnings. l Co-ordination with Regional and State Meteorological Centres for location specific forecasts Aviation Cell l Preparation of significant weather charts for analysis purpose. l Monitoring of aviation weather through 17 Aerodrome Meteorological offices, 51 Aeronautical Meteorological Weather offices and Meteorological Watch offices (MWO).(Fog over northern India as seen in Satellite picture)

Cyclone Warning & Marine Forecasting Cell l Responsible for monitoring and prediction of cyclone disturbances over the north Indian Ocean. l Issuance of warning and advisory to national and international disaster management agencies. l as Regional Specialised Meteorological Acts Centre (RSMC) to issue tropical cyclone advisories to World Meteorological Organisation (WMO) /Economic & Social Co-operation for Asia and Pacific (ESCAP) Panel countries. l acts as Tropical Cyclone Advisory Centre Also (TCAC) to provide advisories for International Civil Aviation Organisation (ICAO).

Climate Cell l Climate cell provides the climatological information processed through CLYSIS system to the forecasters.

Satellite and Radar Support Cellsl To facilitate the interpretation of satellite and radar

products for forecastingl Interpret the radar products and assist the

forecasters in NWFC in issuance of weather advisories and Nowcasting of severe weather. l Satellite application cell monitors and interprets satellite products and functions in the same manner as the radar cell. PWS Cell l Generation and dissemination of customised weather products from the NWFC.

Nowcasting Cell l Responsible for monitoring and prediction of severe weather over the country in 3-6 hour range. l Issuance of alert to the concerned RMCs/MCs regarding the impending severe weather through video conferencing. Agromet and Hydromet Applications Cells l cells are in direct co-ordination with These forecasting cell and generate Agromet and Hydromet products on All India basis.


In the Service of Nation Since 1875

India Meteorological Department

2. Numerical Weather Prediction (NWP) CentreGlobal Forecast System (GFS) at T382L64 ( 35 km) resolution has been implemented at IMD Delhi on IBM based High Performance Computing Systems (HPCS). The new GFS is running 2 times a day (00 and 12 UTC) with global data assimilation and forecast for 7 days. This new higher resolution global forecast model and the corresponding assimilation system are adopted from NCEP, USA.

Weather Research & Forecast (WRF-Var) System : The regional mesoscale analysis system (WRF-Var) is installed on HPCS at IMD, Delhi with its all components i.e. pre-processing programs, observation assimilation program (WRF-Var), boundary condition updation and forecasting model. The model runs with 2 domains (27 km and 9 km) at 00 and 12 UTC and forecasts for 3 days.

WRF Non-hydrostatic Mesoscale Model (WRFNMM) for tropical cyclone forecast. Run at the time of tropical cyclone over the Indian Seas.

Polar WRF for predicting weather conditions over Antarctica (Maitri), implemented in IMD in October 2010. Forecast of 10m winds and 2m Temperature for 24 hours over Maitri region.

Extreme Temperature Forecasting : IMD from beginning of 2010 has implemented extreme temperature (Maximum & Minimum) deterministic forecast for two weeks and the monthly probability forecast of extreme temperatures using the ensemble members of coupled model outputs.Forecast maximum temperature (0C) anomaly Based on 08 Apr 2010, valid for 12-18 Apr 2010 Forecast minimum temperature (0C) anomaly Based on 30 Dec 2010, valid for 3-9 Jan 2011 Porbability (%) of Below Normal Maximum Temp Valid for December 2010 (Based on Nov. 2010) Porbability (%) of Below Normal Minimum Temp Valid for December 2010 (Based on Nov. 2010)


In the Service of Nation Since 1875

India Meteorological Department

3. NowcastingNowcasting falls under the category of weather forecasting valid for very short duration (say upto 6 hours). The venue specific forecasts based on meso-scale model with the assimilation of Delhi Doppler Weather Radar Observation was implemented to support weather forecast system for Delhi Commonwealth Games 2010. Different nowcast products are given here :

NOWCAST SYSTEM - SWIRLS (Based on Delhi Radar Data)

Location Specific Meteograms (WRF-VAR at 3 KM Resolution)

NOWCAST SYSTEM -WDSSII (Based on Delhi Radar Data)

MESOSCALE MODEL ARPS (with DWR assimilation)

4. Meteorological TelecommunicationTelecommunication Division of IMD provides the support function needed for meteorological data and processed products to the users, both on national and international level. Since its inception in 1969, IMD maintains an extensive telecommunication network for speedy collection of meteorological information, both basic data and processed products, all over the globe. The main telecommunication hub of the IMD's telecommunication network is located at New Delhi. It is now termed the National Meteorological Telecommunication Centre (NMTC).

? New Delhi is a Regional Telecommunication Hub (RTH) on the Main Telecommunication Network (MTN)? The National

connecting the two World Meteorological Centres, Moscow directly and Washington via Tokyo. Meteorological Telecommunication Network (NMTN) is designed to collect observational data and to receive and distribute meteorological information on a national level through 19 collection centers (which are either Meteorological Centers at the State Capitals or Regional Meteorological Centres).


In the Service of Nation Since 1875

India Meteorological Department

5. Integrated Data Processing and Communication SystemsThis is focused on core (critical) information systems and integration of all new components into a comprehensive single system, which includes following major components : TRANSMET, Central Information & Processing System (CIPS), CLISYS, SYNERGIE and Public Weather System (PWS). TRANSMET -Is the new central node of IMD national & international telecommunications. ? Information & Pr