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How KNMI meteorologists work with meteorological information systems

How KNMI meteorologists work with meteorological information systems. Jos Diepeveen forecaster Central Weather room De Bilt. Overview. Weather room Different types of forecasts/forecasters Example of 2 types of forecasts with a link to GIS.

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How KNMI meteorologists work with meteorological information systems

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  1. How KNMI meteorologists work with meteorological information systems Jos Diepeveen forecaster Central Weather room De Bilt ADAGUC PRESENTATION

  2. Overview • Weather room • Different types of forecasts/forecasters • Example of 2 types of forecasts with a link to GIS. • Short demonstration of Meteorological Workstation ADAGUC PRESENTATION

  3. Central weather room De Bilt General forecaster Maritime forecasterAviation forecaster ADAGUC PRESENTATION

  4. Forecasts have different scales in time and space • 0-18 hrs  NOWCASTING • 18-48 hrs  Short term Forecasting • 48-240 hrs  Long term forecasting Working methods and added value of forecaster is very dependent of timescale. ADAGUC PRESENTATION

  5. Long term forecasting (48-240 hrs) • Looking at large scale flow patterns • Forecast to ten days at 40 km resolution (high-resolution model) • Added value of a forecaster? ADAGUC PRESENTATION

  6. Long term forecasting (48-240 hrs) • Ensemble prediction system ADAGUC PRESENTATION

  7. Short term forecasting 18-48 hrs • Use of Local area models (HiRLAM) resolution 11/22 km ADAGUC PRESENTATION

  8. Short term forecasting 18-48 hrs • Regional differences can be made • Added value of a forecaster? ADAGUC PRESENTATION

  9. Nowcasting (0-18 hrs) • High resolution local area models • Radar/Satellite/Ground observations • Added value of a forecaster. NWP models Observations End Production forecaster Workstation ADAGUC PRESENTATION

  10. Nowcasting (0-18 hr) • Combination of Sat-observations and modelfields to verify the numerical model. ADAGUC PRESENTATION

  11. Nowcasting (0-18 hr) ADAGUC PRESENTATION

  12. Nowcasting (0-18 hr) • Combination of ground-observations and modelfields to verify the numerical model. ADAGUC PRESENTATION

  13. Nowcasting (0-18 hr) • Marking of important meteorological items. Quite often using of simple linear extrapolation. Finescale structures are usually not ‘caught’ by the numerical model Radar (loop) ADAGUC PRESENTATION

  14. Example of 2 types of forecasts with a link to GIS. • Downscaling • Chemical calamities ADAGUC PRESENTATION

  15. Downscaling • Highest resolution of Hirlam model 11 km • Flightplanning on e.g. Airports (sometimes) needs finer scale • Downscaling is bases on simple model of the Planet Boundary layer and on the use of high resolution topographical information of surface roughness derived from GIS datasets ADAGUC PRESENTATION

  16. Downscaling Model wind (10m) Downscaling wind ADAGUC PRESENTATION

  17. Windprofiles for runways on Amsterdam airport Downscaling http://oper.knmi.nl/downscaling ADAGUC PRESENTATION

  18. Chemical calamities vs GIS • In case of a chemical calamity KNMI provides meteorological information on a interactive internet portal of the responsible ministry of environment. • Calculation of dispersion is made and combined with an advanced GIS functionality ADAGUC PRESENTATION

  19. ADAGUC PRESENTATION

  20. Short Demonstration of Meteorological Work Station ADAGUC PRESENTATION

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