Daniël van Dijke MSc.

The use of a high resolution model in a private environment

Daniël van Dijke (MeteoGroup)

Wim van den Berg, Gerald van de Grijn, Marlous Jonker, Dirk Malda

• Introduction

• MeteoGroup enhancements

• Example case

• Use within MeteoGroup

Outline

IntroductionWeather Research and Forecasting Model (WRF®1)• National Center for Atmospheric Research (NCAR)• National Oceanic and Atmospheric Administration (NOAA)• National Centers for Environmental Prediction (NCEP)• Forecast Systems Laboratory (FSL)• Air Force Weather Agency (AFWA)• Naval Research Laboratory• Oklahoma University • Federal Aviation Administration (FAA)• Many users….

 1 WRF® is a registered trademark of the University Corporation for Atmospheric Research (UCAR)

MG enhancements

•ECMWF model level data instead of pressure level data•High resolution land use and roughness data•3DVAR observation nudging

MG enhancements

Skin surface temperature near coast

ECMWF landmask

ECMWF skin surface temperature at 0 UTC

Case: 21-07-2009

21-07-2009 12 UTC 22-07-2009 12 UTC

Maximum 2m temperature 21-07-2009

VIS 16 UTC 21-07-2009

Observations

13:00 – 23:55 UTC 21-07-2009

Case: 21-07-2009

Observations

Maximum wind gustspast 24h (knots)0 UTC 22-07-2009

Case: 21-07-2009

WRF – setup

WRF v3.1.1

9km main domain (269x242x43)

3km nest(598x598x43)

ECMWF model level input

Initialisation time: 00:00 UTC 21-07-2009

Case: 21-07-2009

WRF – radar reflectivity

15 UTC

comparison

17 UTC

Case: 21-07-2009

WRF – wind speed / direction

Maximum wind gust WRF (knots) 21-07-2009

Maximum wind gust observed (knots) 21-07-2009

gusts

Case: 21-07-2009

ECMWF

MSLP and Precipitation past 3 hours 12 UTC 21-07-2009 MSLP and Precipitation past 3 hours 15 UTC 21-07-2009 MSLP and Precipitation past 3 hours 18 UTC 21-07-2009 MSLP and Precipitation past 3 hours 21 UTC 21-07-2009

mm

Use within MeteoGroup

Use within MeteoGroup Daniël van Dijke MSc.

•Wind forecasting at hub height in complex terrain•Detection of and warning for severe weather•High resolution downscaling•Regional climate modelling•Tailor made parameters•Air quality applications•Hindcast studies