1. How KNMI meteorologists work with meteorological information systems
Jos Diepeveen
forecaster
Central Weather room De Bilt
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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
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3. General forecaster Maritime forecaster Aviation forecaster
Central weather room De Bilt
General forecaster Maritime forecaster Aviation forecaster
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4. Forecasts have different scales in time and space
0-18 hrs  NOWCASTING
18-48 hrs  Short term Forecasting
hrs  Long term forecasting
Working methods and added value of forecaster is very dependent of timescale.
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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?
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6. Long term forecasting (48-240 hrs)
Ensemble prediction system
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7. Short term forecasting 18-48 hrs
Use of Local area models (HiRLAM) resolution 11/22 km
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8. Short term forecasting 18-48 hrs
Regional differences can be made
Added value of a forecaster?
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9. Nowcasting (0-18 hrs) High resolution local area models
Radar/Satellite/Ground observations
Added value of a forecaster.
NWP models
Observations
End Production
Workstation
forecaster
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10. Nowcasting (0-18 hr)
Combination of Sat-observations and modelfields to verify the numerical model.
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11. Nowcasting (0-18 hr)
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12. Nowcasting (0-18 hr)
Combination of ground-observations and modelfields to verify the numerical model.
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13. Nowcasting (0-18 hr) Radar (loop)
Marking of important meteorological items. Quite often using of simple linear extrapolation. Finescale structures are usually not ‘caught’ by the numerical model
Radar (loop)
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14. Example of 2 types of forecasts with a link to GIS.
Downscaling
Chemical calamities
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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
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16. Downscaling Model wind (10m) Downscaling wind 29-4-2019
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17. Downscaling Windprofiles for runways on Amsterdam airport
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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
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19.
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20. Short Demonstration of Meteorological Work Station
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